mirror of
https://github.com/charlienet/go-mixed.git
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fen and yuan
This commit is contained in:
@ -4,6 +4,7 @@ import (
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"strconv"
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"github.com/shopspring/decimal"
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"golang.org/x/exp/constraints"
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)
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// @title 分转换为元
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@ -19,7 +20,6 @@ func CentToDollar(cent int32) string {
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// 元转换为分
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func DollarToCent(dollar string) int64 {
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p, _ := strconv.ParseFloat(dollar, 64)
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d := decimal.New(1, 2)
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@ -27,3 +27,16 @@ func DollarToCent(dollar string) int64 {
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return df
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}
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func FenToYuan[T constraints.Integer](v T) string {
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d := decimal.New(1, 2)
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return decimal.NewFromInt(int64(v)).DivRound(d, 2).StringFixedBank(2)
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}
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func YuanToFen(yuan string) int64 {
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p, _ := decimal.NewFromString(yuan)
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d := decimal.New(1, 2)
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return p.Mul(d).IntPart()
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}
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@ -45,3 +45,45 @@ func TestDollarToCent(t *testing.T) {
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}
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}
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}
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func TestYuanToFen(t *testing.T) {
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cases := []struct {
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dollar string
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excepted int64
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}{
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{"240.40", 24040},
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{"999999.40", 99999940},
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{"999.99", 99999},
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{"0.01", 1},
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{"999999.01", 99999901},
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{"1000000.99", 100000099},
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}
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for _, c := range cases {
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result := YuanToFen(c.dollar)
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if result != c.excepted {
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t.Fatalf("dollar to cent failed, dollar:%s execpted:%d result:%d", c.dollar, c.excepted, result)
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}
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}
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}
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func TestFenToYuan(t *testing.T) {
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cases := []struct {
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cent int
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excepted string
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}{
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{24040, "240.40"},
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{99999940, "999999.40"},
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{99999, "999.99"},
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{1, "0.01"},
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{99999901, "999999.01"},
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{100000099, "1000000.99"},
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}
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for _, c := range cases {
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result := FenToYuan(c.cent)
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if result != c.excepted {
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t.Fatalf("dollar to cent failed, dollar:%d execpted:%s result:%s", c.cent, c.excepted, result)
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}
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}
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}
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