package decimal
import (
"database/sql/driver"
"encoding/json"
"encoding/xml"
"math"
"math/big"
"reflect"
"sort"
"strconv"
"strings"
"testing"
"time"
)
type testEnt struct {
float float64
short string
exact string
inexact string
}
var testTable = []*testEnt{
{3.141592653589793, "3.141592653589793", "", "3.14159265358979300000000000000000000000000000000000004"},
{3, "3", "", "3.0000000000000000000000002"},
{1234567890123456, "1234567890123456", "", "1234567890123456.00000000000000002"},
{1234567890123456000, "1234567890123456000", "", "1234567890123456000.0000000000000008"},
{1234.567890123456, "1234.567890123456", "", "1234.5678901234560000000000000009"},
{.1234567890123456, "0.1234567890123456", "", "0.12345678901234560000000000006"},
{0, "0", "", "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"},
{.1111111111111110, "0.111111111111111", "", "0.111111111111111000000000000000009"},
{.1111111111111111, "0.1111111111111111", "", "0.111111111111111100000000000000000000023423545644534234"},
{.1111111111111119, "0.1111111111111119", "", "0.111111111111111900000000000000000000000000000000000134123984192834"},
{.000000000000000001, "0.000000000000000001", "", "0.00000000000000000100000000000000000000000000000000012341234"},
{.000000000000000002, "0.000000000000000002", "", "0.0000000000000000020000000000000000000012341234123"},
{.000000000000000003, "0.000000000000000003", "", "0.00000000000000000299999999999999999999999900000000000123412341234"},
{.000000000000000005, "0.000000000000000005", "", "0.00000000000000000500000000000000000023412341234"},
{.000000000000000008, "0.000000000000000008", "", "0.0000000000000000080000000000000000001241234432"},
{.1000000000000001, "0.1000000000000001", "", "0.10000000000000010000000000000012341234"},
{.1000000000000002, "0.1000000000000002", "", "0.10000000000000020000000000001234123412"},
{.1000000000000003, "0.1000000000000003", "", "0.1000000000000003000000000000001234123412"},
{.1000000000000005, "0.1000000000000005", "", "0.1000000000000005000000000000000006441234"},
{.1000000000000008, "0.1000000000000008", "", "0.100000000000000800000000000000000009999999999999999999999999999"},
{1e25, "10000000000000000000000000", "", "10000000000000000000000000.00000000000000000098798978"},
{math.MaxInt64, strconv.FormatInt(math.MaxInt64, 10), "", strconv.FormatInt(math.MaxInt64, 10)},
{1.29067116156722e-309, "0", "", "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001290671161567218558822290567835270536800098852722416870074139002112543896676308448335063375297788379444685193974290737962187240854947838776604607190387984577130572928111657710645015086812756013489109884753559084166516937690932698276436869274093950997935137476803610007959500457935217950764794724766740819156974617155861568214427828145972181876775307023388139991104942469299524961281641158436752347582767153796914843896176260096039358494077706152272661453132497761307744086665088096215425146090058519888494342944692629602847826300550628670375451325582843627504604013541465361435761965354140678551369499812124085312128659002910905639984075064968459581691226705666561364681985266583563078466180095375402399087817404368974165082030458595596655868575908243656158447265625000000000000000000000000000000000000004440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
}
var testTableScientificNotation = map[string]string{
"1e9": "1000000000",
"2.41E-3": "0.00241",
"24.2E-4": "0.00242",
"243E-5": "0.00243",
"1e-5": "0.00001",
"245E3": "245000",
"1.2345E-1": "0.12345",
"0e5": "0",
"0e-5": "0",
"123.456e0": "123.456",
"123.456e2": "12345.6",
"123.456e10": "1234560000000",
}
func init() {
for _, s := range testTable {
s.exact = strconv.FormatFloat(s.float, 'f', 1500, 64)
if strings.ContainsRune(s.exact, '.') {
s.exact = strings.TrimRight(s.exact, "0")
s.exact = strings.TrimRight(s.exact, ".")
}
}
// add negatives
withNeg := testTable[:]
for _, s := range testTable {
if s.float > 0 && s.short != "0" && s.exact != "0" {
withNeg = append(withNeg, &testEnt{-s.float, "-" + s.short, "-" + s.exact, "-" + s.inexact})
}
}
testTable = withNeg
for e, s := range testTableScientificNotation {
if string(e[0]) != "-" && s != "0" {
testTableScientificNotation["-"+e] = "-" + s
}
}
}
func TestNewFromFloat(t *testing.T) {
for _, x := range testTable {
s := x.exact
d := NewFromFloat(x.float)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
shouldPanicOn := []float64{
math.NaN(),
math.Inf(1),
math.Inf(-1),
}
for _, n := range shouldPanicOn {
var d Decimal
if !didPanic(func() { d = NewFromFloat(n) }) {
t.Fatalf("Expected panic when creating a Decimal from %v, got %v instead", n, d.String())
}
}
}
func TestNewFromString(t *testing.T) {
for _, x := range testTable {
s := x.short
d, err := NewFromString(s)
if err != nil {
t.Errorf("error while parsing %s", s)
} else if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
for _, x := range testTable {
s := x.exact
d, err := NewFromString(s)
if err != nil {
t.Errorf("error while parsing %s", s)
} else if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
for e, s := range testTableScientificNotation {
d, err := NewFromString(e)
if err != nil {
t.Errorf("error while parsing %s", e)
} else if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
}
func TestFloat64(t *testing.T) {
for _, x := range testTable {
s := x.exact
d, err := NewFromString(s)
if err != nil {
t.Errorf("error while parsing %s", s)
} else if f, exact := d.Float64(); !exact || f != x.float {
t.Errorf("cannot represent exactly %s", s)
}
s = x.inexact
d, err = NewFromString(s)
if err != nil {
t.Errorf("error while parsing %s", s)
} else if f, exact := d.Float64(); exact || f != x.float {
t.Errorf("%s should be represented inexactly", s)
}
}
}
func TestNewFromStringErrs(t *testing.T) {
tests := []string{
"",
"qwert",
"-",
".",
"-.",
".-",
"234-.56",
"234-56",
"2-",
"..",
"2..",
"..2",
".5.2",
"8..2",
"8.1.",
"1e",
"1-e",
"1e9e",
"1ee9",
"1ee",
"1eE",
"1e-",
"1e-.",
"1e1.2",
"123.456e1.3",
"1e-1.2",
"123.456e-1.3",
"123.456Easdf",
"123.456e" + strconv.FormatInt(math.MinInt64, 10),
"123.456e" + strconv.FormatInt(math.MinInt32, 10),
}
for _, s := range tests {
_, err := NewFromString(s)
if err == nil {
t.Errorf("error expected when parsing %s", s)
}
}
}
func TestNewFromStringDeepEquals(t *testing.T) {
type StrCmp struct {
str1 string
str2 string
expected bool
}
tests := []StrCmp{
{"1", "1", true},
{"10", "10.0", true},
{"1.1", "1.10", true},
{"1.001", "1.01", false},
}
for _, cmp := range tests {
d1, err1 := NewFromString(cmp.str1)
d2, err2 := NewFromString(cmp.str2)
if err1 != nil || err2 != nil {
t.Errorf("error parsing strings to decimals")
}
if reflect.DeepEqual(d1, d2) != cmp.expected {
t.Errorf("comparison result is different from expected results for %s and %s",
cmp.str1, cmp.str2)
}
}
}
func TestRequireFromString(t *testing.T) {
s := "1.23"
defer func() {
err := recover()
if err != nil {
t.Errorf("error while parsing %s", s)
}
}()
d := RequireFromString(s)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
func TestRequireFromStringErrs(t *testing.T) {
s := "qwert"
var d Decimal
var err interface{}
func(d Decimal) {
defer func() {
err = recover()
}()
d = RequireFromString(s)
}(d)
if err == nil {
t.Errorf("panic expected when parsing %s", s)
}
}
func TestNewFromFloatWithExponent(t *testing.T) {
type Inp struct {
float float64
exp int32
}
// some tests are taken from here https://www.cockroachlabs.com/blog/rounding-implementations-in-go/
tests := map[Inp]string{
Inp{123.4, -3}: "123.4",
Inp{123.4, -1}: "123.4",
Inp{123.412345, 1}: "120",
Inp{123.412345, 0}: "123",
Inp{123.412345, -5}: "123.41235",
Inp{123.412345, -6}: "123.412345",
Inp{123.412345, -7}: "123.412345",
Inp{123.412345, -28}: "123.4123450000000019599610823207",
Inp{1230000000, 3}: "1230000000",
Inp{123.9999999999999999, -7}: "124",
Inp{123.8989898999999999, -7}: "123.8989899",
Inp{0.49999999999999994, 0}: "0",
Inp{0.5, 0}: "1",
Inp{0., -1000}: "0",
Inp{0.5000000000000001, 0}: "1",
Inp{1.390671161567e-309, 0}: "0",
Inp{4.503599627370497e+15, 0}: "4503599627370497",
Inp{4.503599627370497e+60, 0}: "4503599627370497110902645731364739935039854989106233267453952",
Inp{4.503599627370497e+60, 1}: "4503599627370497110902645731364739935039854989106233267453950",
Inp{4.503599627370497e+60, -1}: "4503599627370497110902645731364739935039854989106233267453952",
Inp{50, 2}: "100",
Inp{49, 2}: "0",
Inp{50, 3}: "0",
// subnormals
Inp{1.390671161567e-309, -2000}: "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001390671161567000864431395448332752540137009987788957394095829635554502771758698872408926974382819387852542087331897381878220271350970912568035007740861074263206736245957501456549756342151614772544950978154339064833880234531754156635411349342950306987480369774780312897442981323940546749863054846093718407237782253156822124910364044261653195961209878120072488178603782495270845071470243842997312255994555557251870400944414666445871039673491570643357351279578519863428540219295076767898526278029257129758694673164251056158277568765100904638511604478844087596428177947970563689475826736810456067108202083804368114484417399279328807983736233036662284338182105684628835292230438999173947056675615385756827890872955322265625",
Inp{1.390671161567e-309, -862}: "0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000013906711615670008644313954483327525401370099877889573940958296355545027717586988724089269743828193878525420873318973818782202713509709125680350077408610742632067362459575014565497563421516147725449509781543390648338802345317541566354113493429503069874803697747803128974429813239405467498630548460937184072377822531568221249103640442616531959612098781200724881786037824952708450714702438429973122559945555572518704009444146664458710396734915706433573512795785198634285402192950767678985262780292571297586946731642510561582775687651009046385116044788440876",
Inp{1.390671161567e-309, -863}: "0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000013906711615670008644313954483327525401370099877889573940958296355545027717586988724089269743828193878525420873318973818782202713509709125680350077408610742632067362459575014565497563421516147725449509781543390648338802345317541566354113493429503069874803697747803128974429813239405467498630548460937184072377822531568221249103640442616531959612098781200724881786037824952708450714702438429973122559945555572518704009444146664458710396734915706433573512795785198634285402192950767678985262780292571297586946731642510561582775687651009046385116044788440876",
}
// add negatives
for p, s := range tests {
if p.float > 0 {
if s != "0" {
tests[Inp{-p.float, p.exp}] = "-" + s
} else {
tests[Inp{-p.float, p.exp}] = "0"
}
}
}
for input, s := range tests {
d := NewFromFloatWithExponent(input.float, input.exp)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
shouldPanicOn := []float64{
math.NaN(),
math.Inf(1),
math.Inf(-1),
}
for _, n := range shouldPanicOn {
var d Decimal
if !didPanic(func() { d = NewFromFloatWithExponent(n, 0) }) {
t.Fatalf("Expected panic when creating a Decimal from %v, got %v instead", n, d.String())
}
}
}
func TestNewFromBigIntWithExponent(t *testing.T) {
type Inp struct {
val *big.Int
exp int32
}
tests := map[Inp]string{
Inp{big.NewInt(123412345), -3}: "123412.345",
Inp{big.NewInt(2234), -1}: "223.4",
Inp{big.NewInt(323412345), 1}: "3234123450",
Inp{big.NewInt(423412345), 0}: "423412345",
Inp{big.NewInt(52341235), -5}: "523.41235",
Inp{big.NewInt(623412345), -6}: "623.412345",
Inp{big.NewInt(723412345), -7}: "72.3412345",
}
// add negatives
for p, s := range tests {
if p.val.Cmp(Zero.value) > 0 {
tests[Inp{p.val.Neg(p.val), p.exp}] = "-" + s
}
}
for input, s := range tests {
d := NewFromBigInt(input.val, input.exp)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
}
func TestJSON(t *testing.T) {
for _, x := range testTable {
s := x.short
var doc struct {
Amount Decimal `json:"amount"`
}
docStr := `{"amount":"` + s + `"}`
docStrNumber := `{"amount":` + s + `}`
err := json.Unmarshal([]byte(docStr), &doc)
if err != nil {
t.Errorf("error unmarshaling %s: %v", docStr, err)
} else if doc.Amount.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, doc.Amount.String(),
doc.Amount.value.String(), doc.Amount.exp)
}
out, err := json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != docStr {
t.Errorf("expected %s, got %s", docStr, string(out))
}
// make sure unquoted marshalling works too
MarshalJSONWithoutQuotes = true
out, err = json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != docStrNumber {
t.Errorf("expected %s, got %s", docStrNumber, string(out))
}
MarshalJSONWithoutQuotes = false
}
}
func TestUnmarshalJSONNull(t *testing.T) {
var doc struct {
Amount Decimal `json:"amount"`
}
docStr := `{"amount": null}`
err := json.Unmarshal([]byte(docStr), &doc)
if err != nil {
t.Errorf("error unmarshaling %s: %v", docStr, err)
} else if !doc.Amount.Equal(Zero) {
t.Errorf("expected Zero, got %s (%s, %d)",
doc.Amount.String(),
doc.Amount.value.String(), doc.Amount.exp)
}
}
func TestBadJSON(t *testing.T) {
for _, testCase := range []string{
"]o_o[",
"{",
`{"amount":""`,
`{"amount":""}`,
`{"amount":"nope"}`,
`0.333`,
} {
var doc struct {
Amount Decimal `json:"amount"`
}
err := json.Unmarshal([]byte(testCase), &doc)
if err == nil {
t.Errorf("expected error, got %+v", doc)
}
}
}
func TestNullDecimalJSON(t *testing.T) {
for _, x := range testTable {
s := x.short
var doc struct {
Amount NullDecimal `json:"amount"`
}
docStr := `{"amount":"` + s + `"}`
docStrNumber := `{"amount":` + s + `}`
err := json.Unmarshal([]byte(docStr), &doc)
if err != nil {
t.Errorf("error unmarshaling %s: %v", docStr, err)
} else {
if !doc.Amount.Valid {
t.Errorf("expected %s to be valid (not NULL), got Valid = false", s)
}
if doc.Amount.Decimal.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, doc.Amount.Decimal.String(),
doc.Amount.Decimal.value.String(), doc.Amount.Decimal.exp)
}
}
out, err := json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != docStr {
t.Errorf("expected %s, got %s", docStr, string(out))
}
// make sure unquoted marshalling works too
MarshalJSONWithoutQuotes = true
out, err = json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != docStrNumber {
t.Errorf("expected %s, got %s", docStrNumber, string(out))
}
MarshalJSONWithoutQuotes = false
}
var doc struct {
Amount NullDecimal `json:"amount"`
}
docStr := `{"amount": null}`
err := json.Unmarshal([]byte(docStr), &doc)
if err != nil {
t.Errorf("error unmarshaling %s: %v", docStr, err)
} else if doc.Amount.Valid {
t.Errorf("expected null value to have Valid = false, got Valid = true and Decimal = %s (%s, %d)",
doc.Amount.Decimal.String(),
doc.Amount.Decimal.value.String(), doc.Amount.Decimal.exp)
}
expected := `{"amount":null}`
out, err := json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != expected {
t.Errorf("expected %s, got %s", expected, string(out))
}
// make sure unquoted marshalling works too
MarshalJSONWithoutQuotes = true
expectedUnquoted := `{"amount":null}`
out, err = json.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != expectedUnquoted {
t.Errorf("expected %s, got %s", expectedUnquoted, string(out))
}
MarshalJSONWithoutQuotes = false
}
func TestNullDecimalBadJSON(t *testing.T) {
for _, testCase := range []string{
"]o_o[",
"{",
`{"amount":""`,
`{"amount":""}`,
`{"amount":"nope"}`,
`{"amount":nope}`,
`0.333`,
} {
var doc struct {
Amount NullDecimal `json:"amount"`
}
err := json.Unmarshal([]byte(testCase), &doc)
if err == nil {
t.Errorf("expected error, got %+v", doc)
}
}
}
func TestXML(t *testing.T) {
for _, x := range testTable {
s := x.short
var doc struct {
XMLName xml.Name `xml:"account"`
Amount Decimal `xml:"amount"`
}
docStr := `` + s + ``
err := xml.Unmarshal([]byte(docStr), &doc)
if err != nil {
t.Errorf("error unmarshaling %s: %v", docStr, err)
} else if doc.Amount.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, doc.Amount.String(),
doc.Amount.value.String(), doc.Amount.exp)
}
out, err := xml.Marshal(&doc)
if err != nil {
t.Errorf("error marshaling %+v: %v", doc, err)
} else if string(out) != docStr {
t.Errorf("expected %s, got %s", docStr, string(out))
}
}
}
func TestBadXML(t *testing.T) {
for _, testCase := range []string{
"o_o",
"7",
``,
``,
`nope`,
`0.333`,
} {
var doc struct {
XMLName xml.Name `xml:"account"`
Amount Decimal `xml:"amount"`
}
err := xml.Unmarshal([]byte(testCase), &doc)
if err == nil {
t.Errorf("expected error, got %+v", doc)
}
}
}
func TestDecimal_rescale(t *testing.T) {
type Inp struct {
int int64
exp int32
rescale int32
}
tests := map[Inp]string{
Inp{1234, -3, -5}: "1.234",
Inp{1234, -3, 0}: "1",
Inp{1234, 3, 0}: "1234000",
Inp{1234, -4, -4}: "0.1234",
}
// add negatives
for p, s := range tests {
if p.int > 0 {
tests[Inp{-p.int, p.exp, p.rescale}] = "-" + s
}
}
for input, s := range tests {
d := New(input.int, input.exp).rescale(input.rescale)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
// test StringScaled
s2 := New(input.int, input.exp).StringScaled(input.rescale)
if s2 != s {
t.Errorf("expected %s, got %s", s, s2)
}
}
}
func TestDecimal_Floor(t *testing.T) {
assertFloor := func(input, expected Decimal) {
got := input.Floor()
if !got.Equal(expected) {
t.Errorf("Floor(%s): got %s, expected %s", input, got, expected)
}
}
type testDataString struct {
input string
expected string
}
testsWithStrings := []testDataString{
{"1.999", "1"},
{"1", "1"},
{"1.01", "1"},
{"0", "0"},
{"0.9", "0"},
{"0.1", "0"},
{"-0.9", "-1"},
{"-0.1", "-1"},
{"-1.00", "-1"},
{"-1.01", "-2"},
{"-1.999", "-2"},
}
for _, test := range testsWithStrings {
expected, _ := NewFromString(test.expected)
input, _ := NewFromString(test.input)
assertFloor(input, expected)
}
type testDataDecimal struct {
input Decimal
expected string
}
testsWithDecimals := []testDataDecimal{
{New(100, -1), "10"},
{New(10, 0), "10"},
{New(1, 1), "10"},
{New(1999, -3), "1"},
{New(101, -2), "1"},
{New(1, 0), "1"},
{New(0, 0), "0"},
{New(9, -1), "0"},
{New(1, -1), "0"},
{New(-1, -1), "-1"},
{New(-9, -1), "-1"},
{New(-1, 0), "-1"},
{New(-101, -2), "-2"},
{New(-1999, -3), "-2"},
}
for _, test := range testsWithDecimals {
expected, _ := NewFromString(test.expected)
assertFloor(test.input, expected)
}
}
func Benchmark_FloorFast(b *testing.B) {
input := New(200, 2)
b.ResetTimer()
for i := 0; i < b.N; i++ {
input.Floor()
}
}
func Benchmark_FloorRegular(b *testing.B) {
input := New(200, -2)
b.ResetTimer()
for i := 0; i < b.N; i++ {
input.Floor()
}
}
func TestDecimal_Ceil(t *testing.T) {
assertCeil := func(input, expected Decimal) {
got := input.Ceil()
if !got.Equal(expected) {
t.Errorf("Ceil(%s): got %s, expected %s", input, got, expected)
}
}
type testDataString struct {
input string
expected string
}
testsWithStrings := []testDataString{
{"1.999", "2"},
{"1", "1"},
{"1.01", "2"},
{"0", "0"},
{"0.9", "1"},
{"0.1", "1"},
{"-0.9", "0"},
{"-0.1", "0"},
{"-1.00", "-1"},
{"-1.01", "-1"},
{"-1.999", "-1"},
}
for _, test := range testsWithStrings {
expected, _ := NewFromString(test.expected)
input, _ := NewFromString(test.input)
assertCeil(input, expected)
}
type testDataDecimal struct {
input Decimal
expected string
}
testsWithDecimals := []testDataDecimal{
{New(100, -1), "10"},
{New(10, 0), "10"},
{New(1, 1), "10"},
{New(1999, -3), "2"},
{New(101, -2), "2"},
{New(1, 0), "1"},
{New(0, 0), "0"},
{New(9, -1), "1"},
{New(1, -1), "1"},
{New(-1, -1), "0"},
{New(-9, -1), "0"},
{New(-1, 0), "-1"},
{New(-101, -2), "-1"},
{New(-1999, -3), "-1"},
}
for _, test := range testsWithDecimals {
expected, _ := NewFromString(test.expected)
assertCeil(test.input, expected)
}
}
func TestDecimal_RoundAndStringFixed(t *testing.T) {
type testData struct {
input string
places int32
expected string
expectedFixed string
}
tests := []testData{
{"1.454", 0, "1", ""},
{"1.454", 1, "1.5", ""},
{"1.454", 2, "1.45", ""},
{"1.454", 3, "1.454", ""},
{"1.454", 4, "1.454", "1.4540"},
{"1.454", 5, "1.454", "1.45400"},
{"1.554", 0, "2", ""},
{"1.554", 1, "1.6", ""},
{"1.554", 2, "1.55", ""},
{"0.554", 0, "1", ""},
{"0.454", 0, "0", ""},
{"0.454", 5, "0.454", "0.45400"},
{"0", 0, "0", ""},
{"0", 1, "0", "0.0"},
{"0", 2, "0", "0.00"},
{"0", -1, "0", ""},
{"5", 2, "5", "5.00"},
{"5", 1, "5", "5.0"},
{"5", 0, "5", ""},
{"500", 2, "500", "500.00"},
{"545", -1, "550", ""},
{"545", -2, "500", ""},
{"545", -3, "1000", ""},
{"545", -4, "0", ""},
{"499", -3, "0", ""},
{"499", -4, "0", ""},
}
// add negative number tests
for _, test := range tests {
expected := test.expected
if expected != "0" {
expected = "-" + expected
}
expectedStr := test.expectedFixed
if strings.ContainsAny(expectedStr, "123456789") && expectedStr != "" {
expectedStr = "-" + expectedStr
}
tests = append(tests,
testData{"-" + test.input, test.places, expected, expectedStr})
}
for _, test := range tests {
d, err := NewFromString(test.input)
if err != nil {
panic(err)
}
// test Round
expected, err := NewFromString(test.expected)
if err != nil {
panic(err)
}
got := d.Round(test.places)
if !got.Equal(expected) {
t.Errorf("Rounding %s to %d places, got %s, expected %s",
d, test.places, got, expected)
}
// test StringFixed
if test.expectedFixed == "" {
test.expectedFixed = test.expected
}
gotStr := d.StringFixed(test.places)
if gotStr != test.expectedFixed {
t.Errorf("(%s).StringFixed(%d): got %s, expected %s",
d, test.places, gotStr, test.expectedFixed)
}
}
}
func TestDecimal_BankRoundAndStringFixed(t *testing.T) {
type testData struct {
input string
places int32
expected string
expectedFixed string
}
tests := []testData{
{"1.454", 0, "1", ""},
{"1.454", 1, "1.5", ""},
{"1.454", 2, "1.45", ""},
{"1.454", 3, "1.454", ""},
{"1.454", 4, "1.454", "1.4540"},
{"1.454", 5, "1.454", "1.45400"},
{"1.554", 0, "2", ""},
{"1.554", 1, "1.6", ""},
{"1.554", 2, "1.55", ""},
{"0.554", 0, "1", ""},
{"0.454", 0, "0", ""},
{"0.454", 5, "0.454", "0.45400"},
{"0", 0, "0", ""},
{"0", 1, "0", "0.0"},
{"0", 2, "0", "0.00"},
{"0", -1, "0", ""},
{"5", 2, "5", "5.00"},
{"5", 1, "5", "5.0"},
{"5", 0, "5", ""},
{"500", 2, "500", "500.00"},
{"545", -2, "500", ""},
{"545", -3, "1000", ""},
{"545", -4, "0", ""},
{"499", -3, "0", ""},
{"499", -4, "0", ""},
{"1.45", 1, "1.4", ""},
{"1.55", 1, "1.6", ""},
{"1.65", 1, "1.6", ""},
{"545", -1, "540", ""},
{"565", -1, "560", ""},
{"555", -1, "560", ""},
}
// add negative number tests
for _, test := range tests {
expected := test.expected
if expected != "0" {
expected = "-" + expected
}
expectedStr := test.expectedFixed
if strings.ContainsAny(expectedStr, "123456789") && expectedStr != "" {
expectedStr = "-" + expectedStr
}
tests = append(tests,
testData{"-" + test.input, test.places, expected, expectedStr})
}
for _, test := range tests {
d, err := NewFromString(test.input)
if err != nil {
panic(err)
}
// test Round
expected, err := NewFromString(test.expected)
if err != nil {
panic(err)
}
got := d.RoundBank(test.places)
if !got.Equal(expected) {
t.Errorf("Bank Rounding %s to %d places, got %s, expected %s",
d, test.places, got, expected)
}
// test StringFixed
if test.expectedFixed == "" {
test.expectedFixed = test.expected
}
gotStr := d.StringFixedBank(test.places)
if gotStr != test.expectedFixed {
t.Errorf("(%s).StringFixed(%d): got %s, expected %s",
d, test.places, gotStr, test.expectedFixed)
}
}
}
func TestDecimal_Uninitialized(t *testing.T) {
a := Decimal{}
b := Decimal{}
decs := []Decimal{
a,
a.rescale(10),
a.Abs(),
a.Add(b),
a.Sub(b),
a.Mul(b),
a.Shift(0),
a.Div(New(1, -1)),
a.Round(2),
a.Floor(),
a.Ceil(),
a.Truncate(2),
}
for _, d := range decs {
if d.String() != "0" {
t.Errorf("expected 0, got %s", d.String())
}
if d.StringFixed(3) != "0.000" {
t.Errorf("expected 0, got %s", d.StringFixed(3))
}
if d.StringScaled(-2) != "0" {
t.Errorf("expected 0, got %s", d.StringScaled(-2))
}
}
if a.Cmp(b) != 0 {
t.Errorf("a != b")
}
if a.Sign() != 0 {
t.Errorf("a.Sign() != 0")
}
if a.Exponent() != 0 {
t.Errorf("a.Exponent() != 0")
}
if a.IntPart() != 0 {
t.Errorf("a.IntPar() != 0")
}
f, _ := a.Float64()
if f != 0 {
t.Errorf("a.Float64() != 0")
}
if a.Rat().RatString() != "0" {
t.Errorf("a.Rat() != 0, got %s", a.Rat().RatString())
}
}
func TestDecimal_Add(t *testing.T) {
type Inp struct {
a string
b string
}
inputs := map[Inp]string{
Inp{"2", "3"}: "5",
Inp{"2454495034", "3451204593"}: "5905699627",
Inp{"24544.95034", ".3451204593"}: "24545.2954604593",
Inp{".1", ".1"}: "0.2",
Inp{".1", "-.1"}: "0",
Inp{"0", "1.001"}: "1.001",
}
for inp, res := range inputs {
a, err := NewFromString(inp.a)
if err != nil {
t.FailNow()
}
b, err := NewFromString(inp.b)
if err != nil {
t.FailNow()
}
c := a.Add(b)
if c.String() != res {
t.Errorf("expected %s, got %s", res, c.String())
}
}
}
func TestDecimal_Sub(t *testing.T) {
type Inp struct {
a string
b string
}
inputs := map[Inp]string{
Inp{"2", "3"}: "-1",
Inp{"12", "3"}: "9",
Inp{"-2", "9"}: "-11",
Inp{"2454495034", "3451204593"}: "-996709559",
Inp{"24544.95034", ".3451204593"}: "24544.6052195407",
Inp{".1", "-.1"}: "0.2",
Inp{".1", ".1"}: "0",
Inp{"0", "1.001"}: "-1.001",
Inp{"1.001", "0"}: "1.001",
Inp{"2.3", ".3"}: "2",
}
for inp, res := range inputs {
a, err := NewFromString(inp.a)
if err != nil {
t.FailNow()
}
b, err := NewFromString(inp.b)
if err != nil {
t.FailNow()
}
c := a.Sub(b)
if c.String() != res {
t.Errorf("expected %s, got %s", res, c.String())
}
}
}
func TestDecimal_Neg(t *testing.T) {
inputs := map[string]string{
"0": "0",
"10": "-10",
"5.56": "-5.56",
"-10": "10",
"-5.56": "5.56",
}
for inp, res := range inputs {
a, err := NewFromString(inp)
if err != nil {
t.FailNow()
}
b := a.Neg()
if b.String() != res {
t.Errorf("expected %s, got %s", res, b.String())
}
}
}
func TestDecimal_NegFromEmpty(t *testing.T) {
a := Decimal{}
b := a.Neg()
if b.String() != "0" {
t.Errorf("expected %s, got %s", "0", b)
}
}
func TestDecimal_Mul(t *testing.T) {
type Inp struct {
a string
b string
}
inputs := map[Inp]string{
Inp{"2", "3"}: "6",
Inp{"2454495034", "3451204593"}: "8470964534836491162",
Inp{"24544.95034", ".3451204593"}: "8470.964534836491162",
Inp{".1", ".1"}: "0.01",
Inp{"0", "1.001"}: "0",
}
for inp, res := range inputs {
a, err := NewFromString(inp.a)
if err != nil {
t.FailNow()
}
b, err := NewFromString(inp.b)
if err != nil {
t.FailNow()
}
c := a.Mul(b)
if c.String() != res {
t.Errorf("expected %s, got %s", res, c.String())
}
}
// positive scale
c := New(1234, 5).Mul(New(45, -1))
if c.String() != "555300000" {
t.Errorf("Expected %s, got %s", "555300000", c.String())
}
}
func TestDecimal_Shift(t *testing.T) {
type Inp struct {
a string
b int32
}
inputs := map[Inp]string{
Inp{"6", 3}: "6000",
Inp{"10", -2}: "0.1",
Inp{"2.2", 1}: "22",
Inp{"-2.2", -1}: "-0.22",
Inp{"12.88", 5}: "1288000",
Inp{"-10234274355545544493", -3}: "-10234274355545544.493",
Inp{"-4612301402398.4753343454", 5}: "-461230140239847533.43454",
}
for inp, expectedStr := range inputs {
num, _ := NewFromString(inp.a)
got := num.Shift(inp.b)
expected, _ := NewFromString(expectedStr)
if !got.Equal(expected) {
t.Errorf("expected %v when shifting %v by %v, got %v",
expected, num, inp.b, got)
}
}
}
func TestDecimal_Div(t *testing.T) {
type Inp struct {
a string
b string
}
inputs := map[Inp]string{
Inp{"6", "3"}: "2",
Inp{"10", "2"}: "5",
Inp{"2.2", "1.1"}: "2",
Inp{"-2.2", "-1.1"}: "2",
Inp{"12.88", "5.6"}: "2.3",
Inp{"1023427554493", "43432632"}: "23563.5628642767953828", // rounded
Inp{"1", "434324545566634"}: "0.0000000000000023",
Inp{"1", "3"}: "0.3333333333333333",
Inp{"2", "3"}: "0.6666666666666667", // rounded
Inp{"10000", "3"}: "3333.3333333333333333",
Inp{"10234274355545544493", "-3"}: "-3411424785181848164.3333333333333333",
Inp{"-4612301402398.4753343454", "23.5"}: "-196268144782.9138440146978723",
}
for inp, expectedStr := range inputs {
num, err := NewFromString(inp.a)
if err != nil {
t.FailNow()
}
denom, err := NewFromString(inp.b)
if err != nil {
t.FailNow()
}
got := num.Div(denom)
expected, _ := NewFromString(expectedStr)
if !got.Equal(expected) {
t.Errorf("expected %v when dividing %v by %v, got %v",
expected, num, denom, got)
}
got2 := num.DivRound(denom, int32(DivisionPrecision))
if !got2.Equal(expected) {
t.Errorf("expected %v on DivRound (%v,%v), got %v", expected, num, denom, got2)
}
}
type Inp2 struct {
n int64
exp int32
n2 int64
exp2 int32
}
// test code path where exp > 0
inputs2 := map[Inp2]string{
Inp2{124, 10, 3, 1}: "41333333333.3333333333333333",
Inp2{124, 10, 3, 0}: "413333333333.3333333333333333",
Inp2{124, 10, 6, 1}: "20666666666.6666666666666667",
Inp2{124, 10, 6, 0}: "206666666666.6666666666666667",
Inp2{10, 10, 10, 1}: "1000000000",
}
for inp, expectedAbs := range inputs2 {
for i := -1; i <= 1; i += 2 {
for j := -1; j <= 1; j += 2 {
n := inp.n * int64(i)
n2 := inp.n2 * int64(j)
num := New(n, inp.exp)
denom := New(n2, inp.exp2)
expected := expectedAbs
if i != j {
expected = "-" + expectedAbs
}
got := num.Div(denom)
if got.String() != expected {
t.Errorf("expected %s when dividing %v by %v, got %v",
expected, num, denom, got)
}
}
}
}
}
func TestDecimal_QuoRem(t *testing.T) {
type Inp4 struct {
d string
d2 string
exp int32
q string
r string
}
cases := []Inp4{
{"10", "1", 0, "10", "0"},
{"1", "10", 0, "0", "1"},
{"1", "4", 2, "0.25", "0"},
{"1", "8", 2, "0.12", "0.04"},
{"10", "3", 1, "3.3", "0.1"},
{"100", "3", 1, "33.3", "0.1"},
{"1000", "10", -3, "0", "1000"},
{"1e-3", "2e-5", 0, "50", "0"},
{"1e-3", "2e-3", 1, "0.5", "0"},
{"4e-3", "0.8", 4, "5e-3", "0"},
{"4.1e-3", "0.8", 3, "5e-3", "1e-4"},
{"-4", "-3", 0, "1", "-1"},
{"-4", "3", 0, "-1", "-1"},
}
for _, inp4 := range cases {
d, _ := NewFromString(inp4.d)
d2, _ := NewFromString(inp4.d2)
prec := inp4.exp
q, r := d.QuoRem(d2, prec)
expectedQ, _ := NewFromString(inp4.q)
expectedR, _ := NewFromString(inp4.r)
if !q.Equal(expectedQ) || !r.Equal(expectedR) {
t.Errorf("bad QuoRem division %s , %s , %d got %v, %v expected %s , %s",
inp4.d, inp4.d2, prec, q, r, inp4.q, inp4.r)
}
if !d.Equal(d2.Mul(q).Add(r)) {
t.Errorf("not fitting: d=%v, d2= %v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
if !q.Equal(q.Truncate(prec)) {
t.Errorf("quotient wrong precision: d=%v, d2= %v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
if r.Abs().Cmp(d2.Abs().Mul(New(1, -prec))) >= 0 {
t.Errorf("remainder too large: d=%v, d2= %v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
if r.value.Sign()*d.value.Sign() < 0 {
t.Errorf("signum of divisor and rest do not match: d=%v, d2= %v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
}
}
type DivTestCase struct {
d Decimal
d2 Decimal
prec int32
}
func createDivTestCases() []DivTestCase {
res := make([]DivTestCase, 0)
var n int32 = 5
a := []int{1, 2, 3, 6, 7, 10, 100, 14, 5, 400, 0, 1000000, 1000000 + 1, 1000000 - 1}
for s := -1; s < 2; s = s + 2 { // 2
for s2 := -1; s2 < 2; s2 = s2 + 2 { // 2
for e1 := -n; e1 <= n; e1++ { // 2n+1
for e2 := -n; e2 <= n; e2++ { // 2n+1
var prec int32
for prec = -n; prec <= n; prec++ { // 2n+1
for _, v1 := range a { // 11
for _, v2 := range a { // 11, even if 0 is skipped
sign1 := New(int64(s), 0)
sign2 := New(int64(s2), 0)
d := sign1.Mul(New(int64(v1), int32(e1)))
d2 := sign2.Mul(New(int64(v2), int32(e2)))
res = append(res, DivTestCase{d, d2, prec})
}
}
}
}
}
}
}
return res
}
func TestDecimal_QuoRem2(t *testing.T) {
for _, tc := range createDivTestCases() {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
q, r := d.QuoRem(d2, prec)
// rule 1: d = d2*q +r
if !d.Equal(d2.Mul(q).Add(r)) {
t.Errorf("not fitting, d=%v, d2=%v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
// rule 2: q is integral multiple of 10^(-prec)
if !q.Equal(q.Truncate(prec)) {
t.Errorf("quotient wrong precision, d=%v, d2=%v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
// rule 3: abs(r)= 0 {
t.Errorf("remainder too large, d=%v, d2=%v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
// rule 4: r and d have the same sign
if r.value.Sign()*d.value.Sign() < 0 {
t.Errorf("signum of divisor and rest do not match, "+
"d=%v, d2=%v, prec=%d, q=%v, r=%v",
d, d2, prec, q, r)
}
}
}
// this is the old Div method from decimal
// Div returns d / d2. If it doesn't divide exactly, the result will have
// DivisionPrecision digits after the decimal point.
func (d Decimal) DivOld(d2 Decimal, prec int) Decimal {
// NOTE(vadim): division is hard, use Rat to do it
ratNum := d.Rat()
ratDenom := d2.Rat()
quoRat := big.NewRat(0, 1).Quo(ratNum, ratDenom)
// HACK(vadim): converting from Rat to Decimal inefficiently for now
ret, err := NewFromString(quoRat.FloatString(prec))
if err != nil {
panic(err) // this should never happen
}
return ret
}
func Benchmark_DivideOriginal(b *testing.B) {
tcs := createDivTestCases()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, tc := range tcs {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
a := d.DivOld(d2, int(prec))
if sign(a) > 2 {
panic("dummy panic")
}
}
}
}
func Benchmark_DivideNew(b *testing.B) {
tcs := createDivTestCases()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, tc := range tcs {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
a := d.DivRound(d2, prec)
if sign(a) > 2 {
panic("dummy panic")
}
}
}
}
func sign(d Decimal) int {
return d.value.Sign()
}
// rules for rounded divide, rounded to integer
// rounded_divide(d,d2) = q
// sign q * sign (d/d2) >= 0
// for d and d2 >0 :
// q is already rounded
// q = d/d2 + r , with r > -0.5 and r <= 0.5
// thus q-d/d2 = r, with r > -0.5 and r <= 0.5
// and d2 q -d = r d2 with r d2 > -d2/2 and r d2 <= d2/2
// and 2 (d2 q -d) = x with x > -d2 and x <= d2
// if we factor in precision then x > -d2 * 10^(-precision) and x <= d2 * 10(-precision)
func TestDecimal_DivRound(t *testing.T) {
cases := []struct {
d string
d2 string
prec int32
result string
}{
{"2", "2", 0, "1"},
{"1", "2", 0, "1"},
{"-1", "2", 0, "-1"},
{"-1", "-2", 0, "1"},
{"1", "-2", 0, "-1"},
{"1", "-20", 1, "-0.1"},
{"1", "-20", 2, "-0.05"},
{"1", "20.0000000000000000001", 1, "0"},
{"1", "19.9999999999999999999", 1, "0.1"},
}
for _, s := range cases {
d, _ := NewFromString(s.d)
d2, _ := NewFromString(s.d2)
result, _ := NewFromString(s.result)
prec := s.prec
q := d.DivRound(d2, prec)
if sign(q)*sign(d)*sign(d2) < 0 {
t.Errorf("sign of quotient wrong, got: %v/%v is about %v", d, d2, q)
}
x := q.Mul(d2).Abs().Sub(d.Abs()).Mul(New(2, 0))
if x.Cmp(d2.Abs().Mul(New(1, -prec))) > 0 {
t.Errorf("wrong rounding, got: %v/%v prec=%d is about %v", d, d2, prec, q)
}
if x.Cmp(d2.Abs().Mul(New(-1, -prec))) <= 0 {
t.Errorf("wrong rounding, got: %v/%v prec=%d is about %v", d, d2, prec, q)
}
if !q.Equal(result) {
t.Errorf("rounded division wrong %s / %s scale %d = %s, got %v", s.d, s.d2, prec, s.result, q)
}
}
}
func TestDecimal_DivRound2(t *testing.T) {
for _, tc := range createDivTestCases() {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
q := d.DivRound(d2, prec)
if sign(q)*sign(d)*sign(d2) < 0 {
t.Errorf("sign of quotient wrong, got: %v/%v is about %v", d, d2, q)
}
x := q.Mul(d2).Abs().Sub(d.Abs()).Mul(New(2, 0))
if x.Cmp(d2.Abs().Mul(New(1, -prec))) > 0 {
t.Errorf("wrong rounding, got: %v/%v prec=%d is about %v", d, d2, prec, q)
}
if x.Cmp(d2.Abs().Mul(New(-1, -prec))) <= 0 {
t.Errorf("wrong rounding, got: %v/%v prec=%d is about %v", d, d2, prec, q)
}
}
}
func TestDecimal_RoundCash(t *testing.T) {
tests := []struct {
d string
interval uint8
result string
}{
{"3.44", 5, "3.45"},
{"3.43", 5, "3.45"},
{"3.42", 5, "3.40"},
{"3.425", 5, "3.45"},
{"3.47", 5, "3.45"},
{"3.478", 5, "3.50"},
{"3.48", 5, "3.50"},
{"348", 5, "348"},
{"3.23", 10, "3.20"},
{"3.33", 10, "3.30"},
{"3.53", 10, "3.50"},
{"3.949", 10, "3.90"},
{"3.95", 10, "4.00"},
{"395", 10, "395"},
{"6.42", 15, "6.40"},
{"6.39", 15, "6.40"},
{"6.35", 15, "6.30"},
{"6.36", 15, "6.40"},
{"6.349", 15, "6.30"},
{"6.30", 15, "6.30"},
{"666", 15, "666"},
{"3.23", 25, "3.25"},
{"3.33", 25, "3.25"},
{"3.53", 25, "3.50"},
{"3.93", 25, "4.00"},
{"3.41", 25, "3.50"},
{"3.249", 50, "3.00"},
{"3.33", 50, "3.50"},
{"3.749999999", 50, "3.50"},
{"3.75", 50, "4.00"},
{"3.93", 50, "4.00"},
{"393", 50, "393"},
{"3.249", 100, "3.00"},
{"3.49999", 100, "3.00"},
{"3.50", 100, "4.00"},
{"3.75", 100, "4.00"},
{"3.93", 100, "4.00"},
{"393", 100, "393"},
}
for i, test := range tests {
d, _ := NewFromString(test.d)
haveRounded := d.RoundCash(test.interval)
result, _ := NewFromString(test.result)
if !haveRounded.Equal(result) {
t.Errorf("Index %d: Cash rounding for %q interval %d want %q, have %q", i, test.d, test.interval, test.result, haveRounded)
}
}
}
func TestDecimal_RoundCash_Panic(t *testing.T) {
defer func() {
if r := recover(); r != nil {
if have, ok := r.(string); ok {
const want = "Decimal does not support this Cash rounding interval `231`. Supported: 5, 10, 15, 25, 50, 100"
if want != have {
t.Errorf("\nWant: %q\nHave: %q", want, have)
}
} else {
t.Errorf("Panic should contain an error string but got:\n%+v", r)
}
} else {
t.Error("Expecting a panic but got nothing")
}
}()
d, _ := NewFromString("1")
d.RoundCash(231)
}
func BenchmarkDecimal_RoundCash_Five(b *testing.B) {
const want = "3.50"
for i := 0; i < b.N; i++ {
val := New(3478, -3)
if have := val.StringFixedCash(5); have != want {
b.Fatalf("\nHave: %q\nWant: %q", have, want)
}
}
}
func BenchmarkDecimal_RoundCash_Fifteen(b *testing.B) {
const want = "6.30"
for i := 0; i < b.N; i++ {
val := New(635, -2)
if have := val.StringFixedCash(15); have != want {
b.Fatalf("\nHave: %q\nWant: %q", have, want)
}
}
}
func TestDecimal_Mod(t *testing.T) {
type Inp struct {
a string
b string
}
inputs := map[Inp]string{
Inp{"3", "2"}: "1",
Inp{"3451204593", "2454495034"}: "996709559",
Inp{"24544.95034", ".3451204593"}: "0.3283950433",
Inp{".1", ".1"}: "0",
Inp{"0", "1.001"}: "0",
Inp{"-7.5", "2"}: "-1.5",
Inp{"7.5", "-2"}: "1.5",
Inp{"-7.5", "-2"}: "-1.5",
}
for inp, res := range inputs {
a, err := NewFromString(inp.a)
if err != nil {
t.FailNow()
}
b, err := NewFromString(inp.b)
if err != nil {
t.FailNow()
}
c := a.Mod(b)
if c.String() != res {
t.Errorf("expected %s, got %s", res, c.String())
}
}
}
func TestDecimal_Overflow(t *testing.T) {
if !didPanic(func() { New(1, math.MinInt32).Mul(New(1, math.MinInt32)) }) {
t.Fatalf("should have gotten an overflow panic")
}
if !didPanic(func() { New(1, math.MaxInt32).Mul(New(1, math.MaxInt32)) }) {
t.Fatalf("should have gotten an overflow panic")
}
}
func TestDecimal_ExtremeValues(t *testing.T) {
// NOTE(vadim): this test takes pretty much forever
if testing.Short() {
t.Skip()
}
// NOTE(vadim): Seriously, the numbers involved are so large that this
// test will take way too long, so mark it as success if it takes over
// 1 second. The way this test typically fails (integer overflow) is that
// a wrong result appears quickly, so if it takes a long time then it is
// probably working properly.
// Why even bother testing this? Completeness, I guess. -Vadim
const timeLimit = 1 * time.Second
test := func(f func()) {
c := make(chan bool)
go func() {
f()
close(c)
}()
select {
case <-c:
case <-time.After(timeLimit):
}
}
test(func() {
got := New(123, math.MinInt32).Floor()
if !got.Equal(NewFromFloat(0)) {
t.Errorf("Error: got %s, expected 0", got)
}
})
test(func() {
got := New(123, math.MinInt32).Ceil()
if !got.Equal(NewFromFloat(1)) {
t.Errorf("Error: got %s, expected 1", got)
}
})
test(func() {
got := New(123, math.MinInt32).Rat().FloatString(10)
expected := "0.0000000000"
if got != expected {
t.Errorf("Error: got %s, expected %s", got, expected)
}
})
}
func TestIntPart(t *testing.T) {
for _, testCase := range []struct {
Dec string
IntPart int64
}{
{"0.01", 0},
{"12.1", 12},
{"9999.999", 9999},
{"-32768.01234", -32768},
} {
d, err := NewFromString(testCase.Dec)
if err != nil {
t.Fatal(err)
}
if d.IntPart() != testCase.IntPart {
t.Errorf("expect %d, got %d", testCase.IntPart, d.IntPart())
}
}
}
func TestDecimal_Min(t *testing.T) {
// the first element in the array is the expected answer, rest are inputs
testCases := [][]float64{
{0, 0},
{1, 1},
{-1, -1},
{1, 1, 2},
{-2, 1, 2, -2},
{-3, 0, 2, -2, -3},
}
for _, test := range testCases {
expected, input := test[0], test[1:]
expectedDecimal := NewFromFloat(expected)
decimalInput := []Decimal{}
for _, inp := range input {
d := NewFromFloat(inp)
decimalInput = append(decimalInput, d)
}
got := Min(decimalInput[0], decimalInput[1:]...)
if !got.Equal(expectedDecimal) {
t.Errorf("Expected %v, got %v, input=%+v", expectedDecimal, got,
decimalInput)
}
}
}
func TestDecimal_Max(t *testing.T) {
// the first element in the array is the expected answer, rest are inputs
testCases := [][]float64{
{0, 0},
{1, 1},
{-1, -1},
{2, 1, 2},
{2, 1, 2, -2},
{3, 0, 3, -2},
{-2, -3, -2},
}
for _, test := range testCases {
expected, input := test[0], test[1:]
expectedDecimal := NewFromFloat(expected)
decimalInput := []Decimal{}
for _, inp := range input {
d := NewFromFloat(inp)
decimalInput = append(decimalInput, d)
}
got := Max(decimalInput[0], decimalInput[1:]...)
if !got.Equal(expectedDecimal) {
t.Errorf("Expected %v, got %v, input=%+v", expectedDecimal, got,
decimalInput)
}
}
}
func TestDecimal_Scan(t *testing.T) {
// test the Scan method that implements the
// sql.Scanner interface
// check for the for different type of values
// that are possible to be received from the database
// drivers
// in normal operations the db driver (sqlite at least)
// will return an int64 if you specified a numeric format
a := Decimal{}
dbvalue := float64(54.33)
expected := NewFromFloat(dbvalue)
err := a.Scan(dbvalue)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(54.33) failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Equal(expected) {
t.Errorf("%s does not equal to %s", a, expected)
}
}
// apparently MySQL 5.7.16 and returns these as float32 so we need
// to handle these as well
dbvalueFloat32 := float32(54.33)
expected = NewFromFloat(float64(dbvalueFloat32))
err = a.Scan(dbvalueFloat32)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(54.33) failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Equal(expected) {
t.Errorf("%s does not equal to %s", a, expected)
}
}
// at least SQLite returns an int64 when 0 is stored in the db
// and you specified a numeric format on the schema
dbvalueInt := int64(0)
expected = New(dbvalueInt, 0)
err = a.Scan(dbvalueInt)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(0) failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Equal(expected) {
t.Errorf("%s does not equal to %s", a, expected)
}
}
// in case you specified a varchar in your SQL schema,
// the database driver will return byte slice []byte
valueStr := "535.666"
dbvalueStr := []byte(valueStr)
expected, err = NewFromString(valueStr)
if err != nil {
t.Fatal(err)
}
err = a.Scan(dbvalueStr)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan('535.666') failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Equal(expected) {
t.Errorf("%s does not equal to %s", a, expected)
}
}
// lib/pq can also return strings
expected, err = NewFromString(valueStr)
if err != nil {
t.Fatal(err)
}
err = a.Scan(valueStr)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan('535.666') failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Equal(expected) {
t.Errorf("%s does not equal to %s", a, expected)
}
}
type foo struct{}
err = a.Scan(foo{})
if err == nil {
t.Errorf("a.Scan(Foo{}) should have thrown an error but did not")
}
}
func TestDecimal_Value(t *testing.T) {
// Make sure this does implement the database/sql's driver.Valuer interface
var d Decimal
if _, ok := interface{}(d).(driver.Valuer); !ok {
t.Error("Decimal does not implement driver.Valuer")
}
// check that normal case is handled appropriately
a := New(1234, -2)
expected := "12.34"
value, err := a.Value()
if err != nil {
t.Errorf("Decimal(12.34).Value() failed with message: %s", err)
} else if value.(string) != expected {
t.Errorf("%s does not equal to %s", a, expected)
}
}
// old tests after this line
func TestDecimal_Scale(t *testing.T) {
a := New(1234, -3)
if a.Exponent() != -3 {
t.Errorf("error")
}
}
func TestDecimal_Abs1(t *testing.T) {
a := New(-1234, -4)
b := New(1234, -4)
c := a.Abs()
if c.Cmp(b) != 0 {
t.Errorf("error")
}
}
func TestDecimal_Abs2(t *testing.T) {
a := New(-1234, -4)
b := New(1234, -4)
c := b.Abs()
if c.Cmp(a) == 0 {
t.Errorf("error")
}
}
func TestDecimal_Equalities(t *testing.T) {
a := New(1234, 3)
b := New(1234, 3)
c := New(1234, 4)
if !a.Equal(b) {
t.Errorf("%q should equal %q", a, b)
}
if a.Equal(c) {
t.Errorf("%q should not equal %q", a, c)
}
// note, this block should be deprecated, here for backwards compatibility
if !a.Equals(b) {
t.Errorf("%q should equal %q", a, b)
}
if !c.GreaterThan(b) {
t.Errorf("%q should be greater than %q", c, b)
}
if b.GreaterThan(c) {
t.Errorf("%q should not be greater than %q", b, c)
}
if !a.GreaterThanOrEqual(b) {
t.Errorf("%q should be greater or equal %q", a, b)
}
if !c.GreaterThanOrEqual(b) {
t.Errorf("%q should be greater or equal %q", c, b)
}
if b.GreaterThanOrEqual(c) {
t.Errorf("%q should not be greater or equal %q", b, c)
}
if !b.LessThan(c) {
t.Errorf("%q should be less than %q", a, b)
}
if c.LessThan(b) {
t.Errorf("%q should not be less than %q", a, b)
}
if !a.LessThanOrEqual(b) {
t.Errorf("%q should be less than or equal %q", a, b)
}
if !b.LessThanOrEqual(c) {
t.Errorf("%q should be less than or equal %q", a, b)
}
if c.LessThanOrEqual(b) {
t.Errorf("%q should not be less than or equal %q", a, b)
}
}
func TestDecimal_ScalesNotEqual(t *testing.T) {
a := New(1234, 2)
b := New(1234, 3)
if a.Equal(b) {
t.Errorf("%q should not equal %q", a, b)
}
}
func TestDecimal_Cmp1(t *testing.T) {
a := New(123, 3)
b := New(-1234, 2)
if a.Cmp(b) != 1 {
t.Errorf("Error")
}
}
func TestDecimal_Cmp2(t *testing.T) {
a := New(123, 3)
b := New(1234, 2)
if a.Cmp(b) != -1 {
t.Errorf("Error")
}
}
func TestPow(t *testing.T) {
a := New(4, 0)
b := New(2, 0)
x := a.Pow(b)
if x.String() != "16" {
t.Errorf("Error, saw %s", x.String())
}
}
func TestNegativePow(t *testing.T) {
a := New(4, 0)
b := New(-2, 0)
x := a.Pow(b)
if x.String() != "0.0625" {
t.Errorf("Error, saw %s", x.String())
}
}
func TestDecimal_Sign(t *testing.T) {
if Zero.Sign() != 0 {
t.Errorf("%q should have sign 0", Zero)
}
one := New(1, 0)
if one.Sign() != 1 {
t.Errorf("%q should have sign 1", one)
}
mone := New(-1, 0)
if mone.Sign() != -1 {
t.Errorf("%q should have sign -1", mone)
}
}
func didPanic(f func()) bool {
ret := false
func() {
defer func() {
if message := recover(); message != nil {
ret = true
}
}()
// call the target function
f()
}()
return ret
}
func TestDecimal_Coefficient(t *testing.T) {
d := New(123, 0)
co := d.Coefficient()
if co.Int64() != 123 {
t.Error("Coefficient should be 123; Got:", co)
}
co.Set(big.NewInt(0))
if d.IntPart() != 123 {
t.Error("Modifying coefficient modified Decimal; Got:", d)
}
}
type DecimalSlice []Decimal
func (p DecimalSlice) Len() int { return len(p) }
func (p DecimalSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p DecimalSlice) Less(i, j int) bool { return p[i].Cmp(p[j]) < 0 }
func Benchmark_Cmp(b *testing.B) {
decimals := DecimalSlice([]Decimal{})
for i := 0; i < 1000000; i++ {
decimals = append(decimals, New(int64(i), 0))
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
sort.Sort(decimals)
}
}
func TestNullDecimal_Scan(t *testing.T) {
// test the Scan method that implements the
// sql.Scanner interface
// check for the for different type of values
// that are possible to be received from the database
// drivers
// in normal operations the db driver (sqlite at least)
// will return an int64 if you specified a numeric format
// Make sure handles nil values
a := NullDecimal{}
var dbvaluePtr interface{}
err := a.Scan(dbvaluePtr)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(nil) failed with message: %s", err)
} else {
if a.Valid {
t.Errorf("%s is not null", a.Decimal)
}
}
dbvalue := float64(54.33)
expected := NewFromFloat(dbvalue)
err = a.Scan(dbvalue)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(54.33) failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Valid {
t.Errorf("%s is null", a.Decimal)
} else if !a.Decimal.Equals(expected) {
t.Errorf("%s does not equal to %s", a.Decimal, expected)
}
}
// at least SQLite returns an int64 when 0 is stored in the db
// and you specified a numeric format on the schema
dbvalueInt := int64(0)
expected = New(dbvalueInt, 0)
err = a.Scan(dbvalueInt)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan(0) failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Valid {
t.Errorf("%s is null", a.Decimal)
} else if !a.Decimal.Equals(expected) {
t.Errorf("%v does not equal %v", a, expected)
}
}
// in case you specified a varchar in your SQL schema,
// the database driver will return byte slice []byte
valueStr := "535.666"
dbvalueStr := []byte(valueStr)
expected, err = NewFromString(valueStr)
if err != nil {
t.Fatal(err)
}
err = a.Scan(dbvalueStr)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan('535.666') failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Valid {
t.Errorf("%s is null", a.Decimal)
} else if !a.Decimal.Equals(expected) {
t.Errorf("%v does not equal %v", a, expected)
}
}
// lib/pq can also return strings
expected, err = NewFromString(valueStr)
if err != nil {
t.Fatal(err)
}
err = a.Scan(valueStr)
if err != nil {
// Scan failed... no need to test result value
t.Errorf("a.Scan('535.666') failed with message: %s", err)
} else {
// Scan succeeded... test resulting values
if !a.Valid {
t.Errorf("%s is null", a.Decimal)
} else if !a.Decimal.Equals(expected) {
t.Errorf("%v does not equal %v", a, expected)
}
}
}
func TestNullDecimal_Value(t *testing.T) {
// Make sure this does implement the database/sql's driver.Valuer interface
var nullDecimal NullDecimal
if _, ok := interface{}(nullDecimal).(driver.Valuer); !ok {
t.Error("NullDecimal does not implement driver.Valuer")
}
// check that null is handled appropriately
value, err := nullDecimal.Value()
if err != nil {
t.Errorf("NullDecimal{}.Valid() failed with message: %s", err)
} else if value != nil {
t.Errorf("%v is not nil", value)
}
// check that normal case is handled appropriately
a := NullDecimal{Decimal: New(1234, -2), Valid: true}
expected := "12.34"
value, err = a.Value()
if err != nil {
t.Errorf("NullDecimal(12.34).Value() failed with message: %s", err)
} else if value.(string) != expected {
t.Errorf("%v does not equal %v", a, expected)
}
}
func TestBinary(t *testing.T) {
for _, y := range testTable {
x := y.float
// Create the decimal
d1 := NewFromFloat(x)
// Encode to binary
b, err := d1.MarshalBinary()
if err != nil {
t.Errorf("error marshalling %v to binary: %v", d1, err)
}
// Restore from binary
var d2 Decimal
err = (&d2).UnmarshalBinary(b)
if err != nil {
t.Errorf("error unmarshalling from binary: %v", err)
}
// The restored decimal should equal the original
if !d1.Equals(d2) {
t.Errorf("expected %v when restoring, got %v", d1, d2)
}
}
}
func slicesEqual(a, b []byte) bool {
for i, val := range a {
if b[i] != val {
return false
}
}
return true
}
func TestGobEncode(t *testing.T) {
for _, y := range testTable {
x := y.float
d1 := NewFromFloat(x)
b1, err := d1.GobEncode()
if err != nil {
t.Errorf("error encoding %v to binary: %v", d1, err)
}
d2 := NewFromFloat(x)
b2, err := d2.GobEncode()
if err != nil {
t.Errorf("error encoding %v to binary: %v", d2, err)
}
if !slicesEqual(b1, b2) {
t.Errorf("something about the gobencode is not working properly \n%v\n%v", b1, b2)
}
var d3 Decimal
err = d3.GobDecode(b1)
if err != nil {
t.Errorf("Error gobdecoding %v, got %v", b1, d3)
}
var d4 Decimal
err = d4.GobDecode(b2)
if err != nil {
t.Errorf("Error gobdecoding %v, got %v", b2, d4)
}
eq := d3.Equal(d4)
if eq != true {
t.Errorf("Encoding then decoding mutated Decimal")
}
eq = d1.Equal(d3)
if eq != true {
t.Errorf("Error gobencoding/decoding %v, got %v", d1, d3)
}
}
}
func TestSum(t *testing.T) {
vals := make([]Decimal, 10)
var i = int64(0)
for key := range vals {
vals[key] = New(i, 0)
i++
}
sum := Sum(vals[0], vals[1:]...)
if !sum.Equal(New(45, 0)) {
t.Errorf("Failed to calculate sum, expected %s got %s", New(45, 0), sum)
}
}
func TestAvg(t *testing.T) {
vals := make([]Decimal, 10)
var i = int64(0)
for key := range vals {
vals[key] = New(i, 0)
i++
}
avg := Avg(vals[0], vals[1:]...)
if !avg.Equal(NewFromFloat(4.5)) {
t.Errorf("Failed to calculate average, expected %s got %s", NewFromFloat(4.5).String(), avg.String())
}
}
func TestRoundBankAnomaly(t *testing.T) {
a := New(25, -1)
b := New(250, -2)
if !a.Equal(b) {
t.Errorf("Expected %s to equal %s", a, b)
}
expected := New(2, 0)
aRounded := a.RoundBank(0)
if !aRounded.Equal(expected) {
t.Errorf("Expected bank rounding %s to equal %s, but it was %s", a, expected, aRounded)
}
bRounded := b.RoundBank(0)
if !bRounded.Equal(expected) {
t.Errorf("Expected bank rounding %s to equal %s, but it was %s", b, expected, bRounded)
}
}
// Trig tests
// For Atan
func TestAtan(t *testing.T) {
inps := []string{
"-2.91919191919191919",
"-1.0",
"-0.25",
"0.0",
"0.33",
"1.0",
"5.0",
"10",
"11000020.2407442310156021090304691671842603586882014729198302312846062338790031898128063403419218957424",
}
sols := []string{
"-1.2407643882205801102743706275310603586882014729198302312846062338790031898128063403419218957424163818359375",
"-0.78539816339744833061616997868383017934410073645991511564230311693950159490640317017096094787120819091796875",
"-0.24497866312686415",
"0.0",
"0.318747560420644443",
"0.78539816339744833061616997868383017934410073645991511564230311693950159490640317017096094787120819091796875",
"1.3734007669450159012323399573676603586882014729198302312846062338790031898128063403419218957424163818359375",
"1.4711276743037346312323399573676603586882014729198302312846062338790031898128063403419218957424163818359375",
"1.5707962358859730612325945023537403586882014729198302312846062338790031898128063403419218957424163818359375",
}
for i, inp := range inps {
d, err := NewFromString(inp)
if err != nil {
t.FailNow()
}
s, err := NewFromString(sols[i])
if err != nil {
t.FailNow()
}
a := d.Atan()
if !a.Equal(s) {
t.Errorf("expected %s, got %s", s, a)
}
}
}
// For Sin
func TestSin(t *testing.T) {
inps := []string{
"-2.91919191919191919",
"-1.0",
"-0.25",
"0.0",
"0.33",
"1.0",
"5.0",
"10",
"11000020.2407442310156021090304691671842603586882014729198302312846062338790031898128063403419218957424",
}
sols := []string{
"-0.220571862520030093613839729898389234591448264443828979962999436149729548845614563657783710150808249493659603883785557750857064742068654401611592366453156979425089038732558977915147138610177101332138819745624841999009731533470874398791630404814623756725761484209848526893621903868344844362592350061614721709283168025028307789990557501123216276655612701350632840149744527732872833304632776220881820168763715880072271900752263175824768749676997835634284780882959485313122780499486873741058283218325040301421620652217699025347852371634749059985101913743575566482455108757945784327770283152556778940395109157571785095552777237471737930299497127855782791647416409676751196562400230573256919649166116220548146722732673811940013822174052471575484241086300786209457059067702404625074214637302180559257156598478224357461349695824437855046828206155188482292930722180491096361781653423287753045189099820938975700063357767823639345982521057442719437079960883170296730778877529726323641962581167118741985973085143794261349309399843621404104514700512532703761239968546841161640494797236796414402075947283426422877298624337798757146020442229118476349906575010431352541089067121029579490866064323880357132858662072455977109093817967157613567800944577216024589669093782841129397681562208313003621389103425798339230823330581188201904296875",
"-0.84147098480789650683573384227719871264659725213827912307678945963233888758666252541652307542471941569920950873234694687123276222626964952320957348347806244448304658355378064371162688704108432893734339281119107889886243608606771440333499496399246182550579552307436056577989755048676139388257574972355638331020916986327112812449023235994235220681962126402627149122741398037411569225585167209440887381294958909446263040889436515610243685011381400045762457675558838333095494482138227725013381292722259213324814381642325470123171162316406069142833674558352099403808484142312206036567122374357983536120130367436871049536150555321227634134943262101222587962853023526365048081446005272233936756658798560188088496199440605960018665932771208203273875932636591008594752836095901878899636892331191188133444513639520743904232369072391326448163751628578886099960312207261234582748222511007033947148867295201489673608530271710726980420265749989442268185776660104680951516862727780322815011940555693819786827407000470928166813302681223319136916385379500478197064927760223020342764479386095349145229773585152310192696649682836151684354735282894320955021997802761069713870309184654536840910246184967655772931790056052366745119986847633246318705770507591911530119455091063686301656648189606417807689546576464738456252196397075290117772324937902655849801056962584258183367906235526162380299193832940968379238027598232552151102936477400362491607666015625",
"-0.247403959254522929719728461264852108650160857317149198152655832001777826134603088803487480618059635162353515625",
"0.0",
"0.324043028394868345912501559420824735488967340443112210114701957327566252120565337691004970110952854156494140625",
"0.84147098480789650683573384227719871264659725213827912307678945963233888758666252541652307542471941569920950873234694687123276222626964952320957348347806244448304658355378064371162688704108432893734339281119107889886243608606771440333499496399246182550579552307436056577989755048676139388257574972355638331020916986327112812449023235994235220681962126402627149122741398037411569225585167209440887381294958909446263040889436515610243685011381400045762457675558838333095494482138227725013381292722259213324814381642325470123171162316406069142833674558352099403808484142312206036567122374357983536120130367436871049536150555321227634134943262101222587962853023526365048081446005272233936756658798560188088496199440605960018665932771208203273875932636591008594752836095901878899636892331191188133444513639520743904232369072391326448163751628578886099960312207261234582748222511007033947148867295201489673608530271710726980420265749989442268185776660104680951516862727780322815011940555693819786827407000470928166813302681223319136916385379500478197064927760223020342764479386095349145229773585152310192696649682836151684354735282894320955021997802761069713870309184654536840910246184967655772931790056052366745119986847633246318705770507591911530119455091063686301656648189606417807689546576464738456252196397075290117772324937902655849801056962584258183367906235526162380299193832940968379238027598232552151102936477400362491607666015625",
"-0.95892427466313846886683534084169138601699178595056142681129038893400410281163045903621198874295374290149806823897075576057724999482959874362888984630786877750800707948164478439888413437709227541296453939066231042449153560817956529124771991719434464325257307490209688817348630841990228088502580219431623697760216390920129365244393334429239217501291865772417470981461975427863913628459487634361457463896191397206119089801538318057594728767278995563353925328463456560840888895608182514323808823801838724482524462741712473496938668730262585034295941891365544300178534659369917661430555201335114597830077556398746790054730682231578093617522006106659977088453875512527401574137870617360741477467052899927465250688663724908651769559466919777914497651416655110015287957761809374118954830175592272643086681859204507636705728518901196924686915642366269243409467335313632803457424138328976320449572075303129501941586734619627126950347146441488301272523732890971103193432131967093584975094064352688636321088866275878367912478080039614015674090467373532503838989934725811696669260106530065305130564789502177378344025691707116401561519233199329283661803416619394138904068356512359009119169667571681552281997620458915816124425995894145459910451225779660911316891499301549117918834162954131295015995478902576153796243561887919093281708146016725119431774666779045011119428333353937254827947830587875729623490751729608660980375134386122226715087890625",
"-0.544021110889369814404798546234261521735237410341301440744913863554325413910729487222404754912397132389280869582562649416317020824255899391102716253549602359933406667420857908751554064982667505778980864397665237869392769251295144996601379178780771501957858736340861984904014191524939793604688756271913886434778180316203812548425041682948461830667971245994025528380063656691687013885731759172341309655658172703937945366976128597657101230629806658897303549468649147494313422814604383947907342285887634159176609268080528703630505118954169027929142559898709956536517735787676487117591429732597764129997800544321069045676840705169697409709450991200259966568075515292000715246707423119024660809599616729869855242609248565503156233847151639381625642548896051440565640966333400046266460293523862957282305141303657282623793830073310394349418290939283661501995774676808852008306303431767521000117474347792119119745767325061425517820206720145795639782171641765977980488850129569363740173287329545019826050789666603219553652178298235868990551128361160456166647394642535572127727629420370720856130359966967599668830582910424823037763854828905673063487188976311335956440851988180468345725600705105113853947651574770698730911647817190648000646872041955859376392859382055300138695355787127336060458870914402496055117808282375335693359375",
"-0.564291758073920672156060501108780948637502927903402695682970758082173347334144085493099932047342878232107294208163423635351694839181128599190761981992082190183414367145761958978263205360050276797203465120166463337285861568628620441149869080262018002460551105733370384496691552603807079787064355499979892738941692390909198368605275928720995456124329350110140031040327865030504338978174244479702663590952255309812151905391076362043165507118546398673253957125454990703254702293833362635280840010399956637688760201442320428708562854314419339362472820724298986435162931641340060501848890585327411159080467227885852591584159465243368331681937734746160681439404005233844642476786199607795910618003577395193096223575912506207477927572401934790710176468073033112942732454695154492720511230782735184156027155137618173659003878927697237751139877779082916148874086491265428313018347132700490228131397266369640661232003084568637049642401980172435548737268283623715380443755530399410106957744899992161330205161097513785489406292271887390739430612193060474304401657511461250218562733033893187306639264886516827894130028111468708805823753758224864450015655567869605537758979198887215555526950741196023433812962018677695204317878927956155283357420412564940844662156159296973147878187706628631717213628871121500196750275790691375732421875",
}
for i, inp := range inps {
d, err := NewFromString(inp)
if err != nil {
t.FailNow()
}
s, err := NewFromString(sols[i])
if err != nil {
t.FailNow()
}
a := d.Sin()
if !a.Equal(s) {
t.Errorf("expected %s, got %s", s, a)
}
}
}
// For Cos
func TestCos(t *testing.T) {
inps := []string{
"-2.91919191919191919",
"-1.0",
"-0.25",
"0.0",
"0.33",
"1.0",
"5.0",
"10",
"11000020.2407442310156021090304691671842603586882014729198302312846062338790031898128063403419218957424",
}
sols := []string{
"-0.975370726167463436728505866323714237868918798735337852490354630275400590397256757982930518671177656988788392411709345759154371178337418085499048191038650091945778580197329516971729513331012900776507504230803826799226710606177535289143559059224362661001603838745169803182674368143452935332062804519861768577138064573259069358975042122485627388192604101700302462362798592115038066626006203292151971117547825788365029212778673068841445412348366566041687247190622871297208478844658065023427261675103854131453079888921085982507674462174796122088474426882259116347806427809304457623578281770915649130727943036401841073052876646614496797452163682420483896962238944883515469778180754205404941121141599952645904787654598990827384683885441411829970587806867632776521257761008506280475694989732289455150722563701599552835784792787892378475275568451704113581492707873602587027241507884412830033365653914549639245334821262039117311046735253960816076120011217151854994903031629514573221302055487026138480621515317251868170670711382669181677841187033304861609062981031260474272177938456322715827189878292157663041430578246790062347759217920400856872733420989333068628730367636465064551304273677450773043171019346261214827671284261815921602597267030573778706635242318228554033918329328451836597811660816887574069149657366695399451977163530476815743551656054860762997757628606444388219917589048259254358441694421344436705112457275390625",
"0.5403023058681397185594704958555785318789737039530258806063132922287686731767103380722879951346341700301934154242672285869862285136280035256635149087722026456653060623287636554810379311566025776640284286043366692017812351065106848975433243878434601646053373656175870219143335780037780263780528022552589948882631781788387243759097393407418459341665025578959743680402679565710214589639277870162089735459876789876164945626397889278949094061300698882180972876375063478762441763141045691438279791675986386217937407677843979434037325100615614204173839676230023544297002103390623811623287987178412049715000660987495684907814359780765658960715423795658408220614069561530422742718922893554271137549412369147629593458239490366605797325139239944180051692566520667214675204069476110320173267646327440417945329562672924843423546460029298423629611979148079742086487910832189641973781754022003095306885302971446512196936121388134045074972570593581133444925052909080976768554628154520121141808489601642421723177702083881285314379847744230155051966361158007017591582046619808944751148550841102122653076944135728372456492657514171872121435155305860386442665726120257630353953444221670261220705805623292334551636518107895571396829211893470388375917284217734121333575035514871632238034279250742569584498765995392820238318876135963364504277706146240234375",
"0.968912421710644784098953478920868172610959295777507211448260716808741793725813506998889579335809685289859771728515625",
"1.0",
"0.946042343528386971548655274719127421974169853736868957009626534392384054569270779300182994120405055582523345947265625",
"0.5403023058681397185594704958555785318789737039530258806063132922287686731767103380722879951346341700301934154242672285869862285136280035256635149087722026456653060623287636554810379311566025776640284286043366692017812351065106848975433243878434601646053373656175870219143335780037780263780528022552589948882631781788387243759097393407418459341665025578959743680402679565710214589639277870162089735459876789876164945626397889278949094061300698882180972876375063478762441763141045691438279791675986386217937407677843979434037325100615614204173839676230023544297002103390623811623287987178412049715000660987495684907814359780765658960715423795658408220614069561530422742718922893554271137549412369147629593458239490366605797325139239944180051692566520667214675204069476110320173267646327440417945329562672924843423546460029298423629611979148079742086487910832189641973781754022003095306885302971446512196936121388134045074972570593581133444925052909080976768554628154520121141808489601642421723177702083881285314379847744230155051966361158007017591582046619808944751148550841102122653076944135728372456492657514171872121435155305860386442665726120257630353953444221670261220705805623292334551636518107895571396829211893470388375917284217734121333575035514871632238034279250742569584498765995392820238318876135963364504277706146240234375",
"0.2836621854632262640413454705014792126730041372592792257206146645426601396441260356011571632089582618925838153657699769828738164020634023542401271546832973668591965970780399287846132178786932147719489387057249755694634919271032742386467263343003762216059912285589934893404186137482489686474984451054771103493648603655340770275593072267521598532667125806036270513157359920795997662877180316554125323347714021810156977000099765637673158040510070215919734518464013962899531358902754977185164550708058199871247160015886870149163066556093196783440812874006182781633602366172183573725257608628866745555998550377960547686470245458626674802626292796549871502254193653242073557087898962773658255810053531370802115864997325060870572958692356612208396119690852149106422002310275167937817158288794799498840438933404405058238604063789542363766559068475105058515056790385539505205746157593694133334912162302627008416603294000615739181111749007688625782080015509782711717307370897514073199106746929535880890780214210719294387601483817437596151502942142722181977054762243644235893248214844557965863434535805464134779033144520828071538407409414463996182938827134980848798774952211899634360773590821173224015934994691863733763099257382589344052735164638723090648652823314675360473802118354232333173901927332659182734442282480813446454703807830810546875",
"-0.839071529076452452453116298055375283024545196907005751226679269494945423257632785713674884440909521085910953206821682885350514489569383484553680293874464258013074629595233233440423524040185080138431677219644537006650333440982266180848432613265727672098505530500860099490052714852637696219860623419861733967504942346257426883650461547676693756422205686582533132927538864456011428540560137047577109540901355332714454892042154044099772961016405398585134639556422987015399944634792029504830682794892974110049771680445087591216461375304720930330852114906188605879368500242393092090599991056282929140339515922705640197683216586300345608814191348583643897583052496585038234458432300602598656172228800591628810870703061601079842675931288590090649649722933122710180797353905585641576282107791663819561479911160784057959370842865399560455463184561649904326467913053219927760200406450092385176263660350059186320075841952511620387666555291853410264149054381143798602019026379808898830628940629734269442061546806433026794983473131041596411391519359668360706593453379582689919628495055879290310156211842712529358591580000339115277557733264569390191184923563095676385834461753760385376605508361399123052214852866448517012467160704995276728328831739643710159503245565807479821789258404871375420699263398077037976545179716664243275062643380243567701961405078734621807138136709079831010972563517559541512724763379083015024662017822265625",
"-0.825575442809343611824362325239811764094510857054278582264067433862269037693599066167126550050055810893236466513641579446123546053932400340779013543022627343780304207889697484852104716170210387967098979368968667582761587933736919053415297219989844530337025837550322738303417999408570541023209479831053490074672524731593393200211612747267787376420912055466715589243670137116181283653627378091767001266729750523670904813955028404725364549436654773973161631448021217524149606880882398338428340541423336476442278764927060929088442662022809429880029452211569992113848964950861453209500601571720208371076364637312918805739974730928391130012733244321591317884640789514132100142038718855057870855384682083191451172141637084656463668180074273357513986650562276924927490092054490207521493248546634803683905992004777812863248355102626794030220223795127136641375381651724046389855784239897808572076152799212203148992979849462537797025824681362178656342679605636982892165755312758468261428421302359039383473990693745647491195856344807310687765672840471336376933282820265780965117564858639226791165667469629053398278240657443123596015059287606479740468263567953594727359402416208210264162078048896806628308236533843407536450642386891796397818074083632855343175466156403711148552219179067451933509186842662133841059218230787130271284099320325244795528905606899665072032213644123281103167139222988313296269780039438046514987945556640625",
}
for i, inp := range inps {
d, err := NewFromString(inp)
if err != nil {
t.FailNow()
}
s, err := NewFromString(sols[i])
if err != nil {
t.FailNow()
}
a := d.Cos()
if !a.Equal(s) {
t.Errorf("expected %s, got %s", s, a)
}
}
}
// For Tan
func TestTan(t *testing.T) {
inps := []string{
"-2.91919191919191919",
"-1.0",
"-0.25",
"0.0",
"0.33",
"1.0",
"5.0",
"10",
"11000020.2407442310156021090304691671842603586882014729198302312846062338790031898128063403419218957424",
}
sols := []string{
"0.226141565050579195128504091376587961550743024795950198353192839504353407742431869564825319685041904449462890625",
"-1.5574077246549022",
"-0.255341921221036275",
"0.0",
"0.342524867530038963",
"1.5574077246549022",
"-3.3805150062465857",
"0.648360827459086657992079596346674836000458368506527382600293171822426231687419573290753760375082492828369140625",
"0.683513254892486971935899897806108130234891903543492515192842067427622421368508870073710248504975849182264766875",
}
for i, inp := range inps {
d, err := NewFromString(inp)
if err != nil {
t.FailNow()
}
s, err := NewFromString(sols[i])
if err != nil {
t.FailNow()
}
a := d.Tan()
if !a.Equal(s) {
t.Errorf("expected %s, got %s", s, a)
}
}
}