mirror of
https://github.com/shopspring/decimal.git
synced 2024-11-22 20:40:48 +01:00
897 lines
19 KiB
Go
897 lines
19 KiB
Go
package decimal
|
|
|
|
import (
|
|
"encoding/json"
|
|
"encoding/xml"
|
|
"math"
|
|
"strconv"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
var testTable = map[float64]string{
|
|
3.141592653589793: "3.141592653589793",
|
|
3: "3",
|
|
1234567890123456: "1234567890123456",
|
|
1234567890123456000: "1234567890123456000",
|
|
1234.567890123456: "1234.567890123456",
|
|
.1234567890123456: "0.1234567890123456",
|
|
0: "0",
|
|
.1111111111111110: "0.111111111111111",
|
|
.1111111111111111: "0.1111111111111111",
|
|
.1111111111111119: "0.1111111111111119",
|
|
.000000000000000001: "0.000000000000000001",
|
|
.000000000000000002: "0.000000000000000002",
|
|
.000000000000000003: "0.000000000000000003",
|
|
.000000000000000005: "0.000000000000000005",
|
|
.000000000000000008: "0.000000000000000008",
|
|
.1000000000000001: "0.1000000000000001",
|
|
.1000000000000002: "0.1000000000000002",
|
|
.1000000000000003: "0.1000000000000003",
|
|
.1000000000000005: "0.1000000000000005",
|
|
.1000000000000008: "0.1000000000000008",
|
|
}
|
|
|
|
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() {
|
|
// add negatives
|
|
for f, s := range testTable {
|
|
if f > 0 {
|
|
testTable[-f] = "-" + s
|
|
}
|
|
}
|
|
for e, s := range testTableScientificNotation {
|
|
if string(e[0]) != "-" && s != "0" {
|
|
testTableScientificNotation["-"+e] = "-" + s
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestNewFromFloat(t *testing.T) {
|
|
for f, s := range testTable {
|
|
d := NewFromFloat(f)
|
|
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 _, s := range testTable {
|
|
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 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 TestNewFromFloatWithExponent(t *testing.T) {
|
|
type Inp struct {
|
|
float float64
|
|
exp int32
|
|
}
|
|
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",
|
|
}
|
|
|
|
// add negatives
|
|
for p, s := range tests {
|
|
if p.float > 0 {
|
|
tests[Inp{-p.float, p.exp}] = "-" + s
|
|
}
|
|
}
|
|
|
|
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 TestJSON(t *testing.T) {
|
|
for _, s := range testTable {
|
|
var doc struct {
|
|
Amount Decimal `json:"amount"`
|
|
}
|
|
docStr := `{"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))
|
|
}
|
|
}
|
|
}
|
|
|
|
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 TestXML(t *testing.T) {
|
|
for _, s := range testTable {
|
|
var doc struct {
|
|
XMLName xml.Name `xml:"account"`
|
|
Amount Decimal `xml:"amount"`
|
|
}
|
|
docStr := `<account><amount>` + s + `</amount></account>`
|
|
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",
|
|
"<abc",
|
|
"<account><amount>7",
|
|
`<html><body></body></html>`,
|
|
`<account><amount></amount></account>`,
|
|
`<account><amount>nope</amount></account>`,
|
|
`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) {
|
|
type testData struct {
|
|
input string
|
|
expected string
|
|
}
|
|
tests := []testData{
|
|
{"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 tests {
|
|
d, _ := NewFromString(test.input)
|
|
expected, _ := NewFromString(test.expected)
|
|
got := d.Floor()
|
|
if !got.Equals(expected) {
|
|
t.Errorf("Floor(%s): got %s, expected %s", d, got, expected)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestDecimal_Ceil(t *testing.T) {
|
|
type testData struct {
|
|
input string
|
|
expected string
|
|
}
|
|
tests := []testData{
|
|
{"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 tests {
|
|
d, _ := NewFromString(test.input)
|
|
expected, _ := NewFromString(test.expected)
|
|
got := d.Ceil()
|
|
if !got.Equals(expected) {
|
|
t.Errorf("Ceil(%s): got %s, expected %s", d, got, 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.Equals(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_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.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.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_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_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, expected := 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)
|
|
if got.String() != expected {
|
|
t.Errorf("expected %s when dividing %v by %v, got %v",
|
|
expected, num, denom, got)
|
|
}
|
|
}
|
|
|
|
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_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 invovled 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.Equals(NewFromFloat(0)) {
|
|
t.Errorf("Error: got %s, expected 0", got)
|
|
}
|
|
})
|
|
test(func() {
|
|
got := New(123, math.MinInt32).Ceil()
|
|
if !got.Equals(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.Equals(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.Equals(expectedDecimal) {
|
|
t.Errorf("Expected %v, got %v, input=%+v", expectedDecimal, got,
|
|
decimalInput)
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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_Equal(t *testing.T) {
|
|
a := New(1234, 3)
|
|
b := New(1234, 3)
|
|
|
|
if !a.Equals(b) {
|
|
t.Errorf("%q should equal %q", a, b)
|
|
}
|
|
}
|
|
|
|
func TestDecimal_ScalesNotEqual(t *testing.T) {
|
|
a := New(1234, 2)
|
|
b := New(1234, 3)
|
|
if a.Equals(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 didPanic(f func()) bool {
|
|
ret := false
|
|
func() {
|
|
|
|
defer func() {
|
|
if message := recover(); message != nil {
|
|
ret = true
|
|
}
|
|
}()
|
|
|
|
// call the target function
|
|
f()
|
|
|
|
}()
|
|
|
|
return ret
|
|
|
|
}
|