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remove 15 interval RoundCash (#166)

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* remove 15 interval RoundCash

* update function doc

* Remove comments and benchmark referring interval 15

Co-authored-by: Mateusz Woś <wos.mateusz16@gmail.com>
This commit is contained in:
Jason Biegel 2020-02-25 19:44:03 -05:00 committed by GitHub
parent 408a2507e1
commit 6c07c6ca86
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 3 additions and 36 deletions
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19
decimal.go
View file

@ -844,10 +844,9 @@ func (d Decimal) RoundBank(places int32) Decimal {
// RoundCash aka Cash/Penny/öre rounding rounds decimal to a specific
// interval. The amount payable for a cash transaction is rounded to the nearest
// multiple of the minimum currency unit available. The following intervals are
// available: 5, 10, 15, 25, 50 and 100; any other number throws a panic.
// available: 5, 10, 25, 50 and 100; any other number throws a panic.
// 5: 5 cent rounding 3.43 => 3.45
// 10: 10 cent rounding 3.45 => 3.50 (5 gets rounded up)
// 15: 10 cent rounding 3.45 => 3.40 (5 gets rounded down)
// 25: 25 cent rounding 3.41 => 3.50
// 50: 50 cent rounding 3.75 => 4.00
// 100: 100 cent rounding 3.50 => 4.00
@ -859,20 +858,6 @@ func (d Decimal) RoundCash(interval uint8) Decimal {
iVal = twentyInt
case 10:
iVal = tenInt
case 15:
if d.exp < 0 {
// TODO: optimize and reduce allocations
orgExp := d.exp
dOne := New(10^-int64(orgExp), orgExp)
d2 := d
d2.exp = 0
if d2.Mod(fiveDec).Equal(Zero) {
d2.exp = orgExp
d2 = d2.Sub(dOne)
d = d2
}
}
iVal = tenInt
case 25:
iVal = fourInt
case 50:
@ -880,7 +865,7 @@ func (d Decimal) RoundCash(interval uint8) Decimal {
case 100:
iVal = oneInt
default:
panic(fmt.Sprintf("Decimal does not support this Cash rounding interval `%d`. Supported: 5, 10, 15, 25, 50, 100", interval))
panic(fmt.Sprintf("Decimal does not support this Cash rounding interval `%d`. Supported: 5, 10, 25, 50, 100", interval))
}
dVal := Decimal{
value: iVal,

10
decimal_bench_test.go
View file

@ -119,16 +119,6 @@ func BenchmarkDecimal_RoundCash_Five(b *testing.B) {
}
}
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 Benchmark_Cmp(b *testing.B) {
decimals := DecimalSlice([]Decimal{})
for i := 0; i < 1000000; i++ {

10
decimal_test.go
View file

@ -1565,14 +1565,6 @@ func TestDecimal_RoundCash(t *testing.T) {
{"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"},
@ -1608,7 +1600,7 @@ 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"
const want = "Decimal does not support this Cash rounding interval `231`. Supported: 5, 10, 25, 50, 100"
if want != have {
t.Errorf("\nWant: %q\nHave: %q", want, have)
}