standard/number/decimal/decimal_test.go

package main

import (
	"fmt"
	"math"
	"testing"

	"github.com/shopspring/decimal"
)

func Test111(t *testing.T) {
	amount, _ := decimal.NewFromString("327312.6934")
	amountFlo := amount.IntPart()
	t.Log(amountFlo)
	count := int(amountFlo)/100000 + 1
	total := 0
	for i := 1; i < count; i++ {
		total = total + 100000

	}
	t.Log(total)
}

func Test222(t *testing.T) {
	amount, _ := decimal.NewFromString("300000.2934")
	invoicePart := int(math.Ceil(amount.InexactFloat64() / 100000))
	t.Log(invoicePart)
}

func Test333(t *testing.T) {
	amount, _ := decimal.NewFromString("-290.83")

	t.Log(amount)
	t.Log(amount.Neg())
	amount2, _ := decimal.NewFromString("290.83")

	t.Log(amount2)
	t.Log(amount2.Neg())
}

func Test444(t *testing.T) {
	amount, _ := decimal.NewFromString("300000.2934")
	t.Log(amount.RoundDown(2))
	t.Log(amount.RoundDown(2).StringFixed(2))
	amount1, _ := decimal.NewFromString("300000.2")
	t.Log(amount1.RoundDown(2))
	t.Log(amount1.RoundDown(2).StringFixed(2))
	amount2, _ := decimal.NewFromString("300000.297")
	t.Log(amount2.RoundDown(2))
	t.Log(amount2.RoundDown(2).StringFixed(2))
	amount3, _ := decimal.NewFromString("300000")
	t.Log(amount3.RoundDown(2))
	t.Log(amount3.RoundDown(2).StringFixed(2))
	amount4, _ := decimal.NewFromString("300000.2834")
	t.Log(amount4.RoundFloor(2))
	t.Log(amount4.RoundDown(2))
	t.Log(amount4.RoundUp(2))
	t.Log(amount4.RoundBank(2))
	t.Log(amount4.RoundCeil(2))
}

func Test555(t *testing.T) {
	amount1, _ := decimal.NewFromString("300000.2834")
	max := decimal.NewFromFloat(100000)
	t.Log(amount1.Div(max).RoundUp(0).IntPart())

	amount2, _ := decimal.NewFromString("210000.2834")
	t.Log(amount2.Div(max).RoundUp(0).IntPart())

	amount3, _ := decimal.NewFromString("200000")
	t.Log(amount3.Div(max).RoundUp(0).IntPart())
}
func Test666(t *testing.T) {
	t.Log(decimal.NewFromInt(30).Mul(decimal.NewFromFloat(0.01)).StringFixed(2))
}

func Test_New(t *testing.T) {
	amount1, _ := decimal.NewFromString("300012.2834")
	t.Log(amount1)
	t.Log(amount1.String())
	t.Log(amount1.IntPart()) //获取整数部分
	t.Log(amount1.InexactFloat64())
	fmt.Println()

	amount2 := decimal.NewFromFloat(300012.2834)
	t.Log(amount2)
	t.Log(amount2.String())
	fmt.Println()

	amount3 := decimal.NewFromInt(300012)
	t.Log(amount3)
	t.Log(amount3.String())
	t.Log(amount3.InexactFloat64())
}

func Test_StringFixed(t *testing.T) {
	amount1, _ := decimal.NewFromString("300012.2834")
	t.Log(amount1.StringFixed(4)) // 300012.2834

	amount2, _ := decimal.NewFromString("300012.2834")
	t.Log(amount2.StringFixed(3)) // 300012.283

	amount3, _ := decimal.NewFromString("300012.2834")
	t.Log(amount3.StringFixed(2)) // 300012.28

	amount4, _ := decimal.NewFromString("300012.2834")
	t.Log(amount4.StringFixed(1)) // 300012.3

	amount5, _ := decimal.NewFromString("300012.2834")
	t.Log(amount5.StringFixed(0)) // 300012

	amount6, _ := decimal.NewFromString("300012.2834")
	t.Log(amount6.StringFixed(-1)) // 300010
}

func Test_Round(t *testing.T) {
	amount1, _ := decimal.NewFromString("300000.2834")
	t.Log(amount1.Round(2).StringFixed(2)) // 300000.28

	amount2, _ := decimal.NewFromString("300000.2864")
	t.Log(amount2.Round(2).StringFixed(2)) // 00000.29

	amount3, _ := decimal.NewFromString("300000.2")
	t.Log(amount3.Round(2).StringFixed(2)) // 300000.20

	amount4, _ := decimal.NewFromString("300000")
	t.Log(amount4.Round(2).StringFixed(2)) // 300000.00

	t.Log("--- StringFixed ---")

	amount5, _ := decimal.NewFromString("300000.2834")
	t.Log(amount5.StringFixed(2)) // 300000.28

	amount6, _ := decimal.NewFromString("300000.2864")
	t.Log(amount6.StringFixed(2)) // 300000.29

	amount7, _ := decimal.NewFromString("300000.2")
	t.Log(amount7.StringFixed(2)) // 300000.20

	amount8, _ := decimal.NewFromString("300000")
	t.Log(amount8.StringFixed(2)) // 300000.00

	t.Log("--- Round ---")
	amount9, _ := decimal.NewFromString("300000.2834")
	t.Log(amount9.Round(2)) // 300000.28

	amount10, _ := decimal.NewFromString("300000.2864")
	t.Log(amount10.Round(2)) // 00000.29

	amount11, _ := decimal.NewFromString("300000.2")
	t.Log(amount11.Round(2)) // 300000.2

	amount12, _ := decimal.NewFromString("300000")
	t.Log(amount12.Round(2)) // 300000

}

func Test_RoundUp(t *testing.T) {
	amount1, _ := decimal.NewFromString("300000.2834")
	t.Log(amount1.RoundUp(2).StringFixed(2)) // 300000.29

	amount2, _ := decimal.NewFromString("300000.2864")
	t.Log(amount2.RoundUp(2).StringFixed(2)) // 300000.29

	amount3, _ := decimal.NewFromString("300000.2")
	t.Log(amount3.RoundUp(2).StringFixed(2)) // 300000.20

	amount4, _ := decimal.NewFromString("300000")
	t.Log(amount4.RoundUp(2).StringFixed(2)) //300000.00
}

func Test_RoundDown(t *testing.T) {
	amount1, _ := decimal.NewFromString("300000.2834")
	t.Log(amount1.RoundDown(2).StringFixed(2)) //300000.28

	amount2, _ := decimal.NewFromString("300000.2864")
	t.Log(amount2.RoundDown(2).StringFixed(2)) //300000.28

	amount3, _ := decimal.NewFromString("300000.2")
	t.Log(amount3.RoundDown(2).StringFixed(2)) //300000.20

	amount4, _ := decimal.NewFromString("300000")
	t.Log(amount4.StringFixed(2)) // 300000.20
}