Golang money.Money类代码示例

func TestMoneyFormatUSD(t *testing.T) {
	symbolUSD := "$"
	codeUSD := "USD"
	valStrExpect := "1234.56"
	valStr2Expect := "1234,56"
	val := int64(123456)
	val2 := float64(1234.56)

	mon := money.Money{M: 123456}
	mf, _ := mon.Format("USD")

	if mf.Symbol != symbolUSD {
		t.Error("wanted '$' but got", mf.Symbol)
	}
	if mf.IsoCode != codeUSD {
		t.Error("wanted 'USD' but got", mf.IsoCode)
	}
	if mf.MoneyVal.StringD() != valStrExpect {
		t.Error("wanted '1234.56' but got", mf.MoneyVal.StringD())
	}
	if mf.MoneyVal.StringC() != valStr2Expect {
		t.Error("wanted '1234,56' but got", mf.MoneyVal.StringC())
	}
	if mf.MoneyVal.Valuei() != val {
		t.Error("wanted int64 '123456' but got", mf.MoneyVal.Valuei())
	}
	if mf.MoneyVal.Valuef() != val2 {
		t.Error("wanted float64 '123456' but got", mf.MoneyVal.Valuef())
	}
}

func TestMoneyUpdateIsMoneyType(t *testing.T) {
	m := money.Money{}
	var val1 int64 = 7868
	res := m.Updatei(val1)

	if res.Valuei() != val1 {
		t.Error("should be '7868'", res.Valuei())
	}

	typ := fmt.Sprintf("%T", m)
	typPointer := fmt.Sprintf("%T", res)

	printValue := fmt.Sprintf("%v", m.M)

	if typ != "money.Money" {
		t.Error("should be money type, instead it is: ", typ)
	}

	if typPointer != "*money.Money" {
		t.Error("should be money type, instead it is: ", typPointer)
	}

	if printValue != "7868" {
		t.Error("default print value for money Updatei() int64 '7868' should be '7868', but got", printValue)
	}

	printValued := fmt.Sprintf("%d", m)
	//if printValued != "{7868 0}" {
	if printValued != "{7868}" {
		//t.Error("base 10 print format of money struct should be base value '{7868 0}'", printValued)
		t.Error("base 10 print format of money struct should be base value '{7868}'", printValued)
	}
}

func TestMoneyVarsNotChanging(t *testing.T) {
	var val1 int64 = 67
	var val2 int64 = 6700
	m1 := money.Money{M: val1}
	m2 := money.Money{M: val2}
	if m1.Valuei() != val1 {
		t.Error("expected '67' got: ", m1.Valuei())
	}

	if m2.Valuei() != val2 {
		t.Error("expected '6700' got: ", m2.Valuei())
	}
}

func TestMoneyFormatBRL(t *testing.T) {
	symbolBRL := "R$"
	codeBRL := "BRL"
	//valStrExpect := "R$1.234,56 BRL"

	mon := money.Money{M: 123456}
	mf, _ := mon.Format("BRL") // "pt-BR" also works

	if mf.Symbol != symbolBRL {
		t.Error("wanted 'R$' but got", mf.Symbol)
	}
	if mf.IsoCode != codeBRL {
		t.Error("wanted 'BRL' but got", mf.IsoCode)
	}
}

func TestMoneyUpdateChangesOriginalValue(t *testing.T) {
	m := money.Money{M: 67}
	m.Updatei(int64(6700))
	if m.Valuei() != int64(6700) {
		t.Error("original vlaue should be updated to '67.00' but got: ", m.Valuei())
	}
}

// division with a large denominator
func TestMoneyDivLargeDenom(t *testing.T) {
	m1 := money.Money{M: 67}   //67 cents!!
	m2 := money.Money{M: 6700} // 67 dollars
	res := m1.Div(&m2)
	finResi := int64(1)
	finResf := float64(0.01)

	if res.Valuei() != finResi {
		t.Error("expected '1' got: ", res.Valuei())
	}

	if res.Valuef() != finResf {
		t.Error("expected '0.01' got: ", res.Valuef())
	}

	if res.StringD() != "0.01" {
		t.Error("expected '100' got: ", res.StringD())
	}
}

// adding large numbers floats via an `Updatef`
func TestMoneyAddLarge(t *testing.T) {
	var val1 float64 = 12390678659.32 //12390678659.32
	var val2 float64 = 8937670084.36  // 8937670084.36
	m1 := money.Money{}
	m2 := money.Money{}
	m1Set := m1.Updatef(val1)
	m2Set := m2.Updatef(val2)
	res := m1Set.Add(m2Set)

	//12390678659.32 + 8937670084.36 = 21,328,348,743.68
	if res.Valuef() != float64(21328348743.68) {
		t.Error("expected negaitve '21328348743.68' got: ", res.Valuef())
	}

	if res.Valuei() != int64(2132834874368) {
		t.Error("expected negaitve '2132834874368' got: ", res.Valuei())
	}

	if res.StringD() != "21328348743.68" {
		t.Error("expected '21328348743.68' got: ", res.StringD())
	}

	//12390678659.32 + 8937670084.36 = 21,328,348,743.68
	if res.StringC() != "21328348743,68" {
		t.Error("expected '21328348743,68' got: ", res.StringC())
	}
}

func TestMoneyOverflow(t *testing.T) {
	flag.Parse()
	if ovf == 0 {
		t.Skip("Skip overflow no 'overflow' cli flag set: 'ovf=1 will run it'")
	}

	r := random(1, 25)
	m1 := money.Money{M: money.MaxInt}
	m2 := money.Money{M: money.MinInt}
	if (r % 2) == 1 {
		_ = m1.Add(&m1)
	} else {
		_ = m2.Sub(&m1)
	}

	/*
		** this was testing using fields on the struct to check for overlfow errors
		// overflow error should return value of struct attempting op
		if res.Valuei() != int64(0) {
			t.Error("expected overflow value to be zero", res.Valuei())
		}

		if res.OvfErr != true {
			t.Error("expected ok to be false", res.OvfErr)
		}

		if len(res.Ovf) < 1 {
			t.Error("need overflow message", res.Ovf)
		}
	*/
}

func TestMoneySmallNumberSubtractLarger(t *testing.T) {
	var val1 int64 = 67   //0.67
	var val2 int64 = 6700 //67.00
	m1 := money.Money{}
	m2 := money.Money{}
	m1Set := m1.Updatei(val1)
	m2Set := m2.Updatei(val2)

	res := m1Set.Sub(m2Set)

	if res.Valuei() != int64(-6633) {
		t.Error("expected negative '-6633' got: ", res.Valuei())
	}

	if res.Valuef() != float64(-66.33) {
		t.Error("expected negative '-66.33' got: ", res.Valuef())
	}
}

func TestMoneyStringWithUpdate(t *testing.T) {
	m := money.Money{M: 67}
	if m.StringD() != "0.67" {
		t.Error("wanted to see '0.67' cents but got: ", m.StringD())
	}

	var val2 int64 = 6700
	m.Updatei(val2)
	if m.StringD() != "67.00" {
		t.Error("wanted to see '67.00' dollars but got: ", m.StringD())
	}
}

// check multiplication is good but also that original values are not modified
func TestMoneyMul(t *testing.T) {
	m1 := money.Money{M: 67}   //67 cents!!
	m2 := money.Money{M: 6700} // 67 dollars
	res := m2.Mul(&m1)
	finResi := int64(4489)    // 44 dollars and 89 cents
	finResf := float64(44.89) // 44 dollars and 89 cents

	if res.Valuei() != finResi {
		t.Error("expected '4489' got: ", res.Valuei())
	}

	if res.Valuef() != finResf {
		t.Error("expected '44.89' got: ", res.Valuef())
	}

	if m1.Valuei() != int64(67) {
		t.Error("expected '67' got: ", m1.Valuei())
	}

	if m2.Valuei() != int64(6700) {
		t.Error("expected '6700' got: ", m2.Valuei())
	}

	if m1.Valuef() != float64(0.67) {
		t.Error("expected '0.67' got: ", m1.Valuef())
	}

	if m2.Valuef() != float64(67.00) {
		t.Error("expected '67.00' got: ", m2.Valuef())
	}

	if res.StringD() != "44.89" {
		t.Error("expected '44.89' got: ", res.StringD())
	}
}

// check subtraction is good but also that original values are not modified
func TestMoneySub(t *testing.T) {
	m1 := money.Money{M: 67}
	m2 := money.Money{M: 6700}
	res := m2.Sub(&m1)
	finResi := int64(6633)
	finResf := float64(66.33)

	if res.Valuei() != finResi {
		t.Error("expected '6633' got: ", res.Valuei())
	}

	if res.Valuef() != finResf {
		t.Error("expected '66.33' got: ", res.Valuef())
	}

	if m1.Valuei() != int64(67) {
		t.Error("expected '67' got: ", m1.Valuei())
	}

	if m2.Valuei() != int64(6700) {
		t.Error("expected '6700' got: ", m2.Valuei())
	}

	if m1.Valuef() != float64(0.67) {
		t.Error("expected '0.67' got: ", m1.Valuef())
	}

	if m2.Valuef() != float64(67.00) {
		t.Error("expected '67.00' got: ", m2.Valuef())
	}

	if res.StringD() != "66.33" {
		t.Error("expected '66.33' got: ", res.StringD())
	}
}

// verify subtracting negatives with updates does UPDATE and change original values
// and returns correct results
func TestMoneyNegativeSubUpdate(t *testing.T) {
	var val1Neg int64 = -1   //-0.01 cents
	var val2Pos int64 = 6700 //-67.00 dollars
	m1Neg := money.Money{}
	m2Pos := money.Money{}
	m1SetNeg := m1Neg.Updatei(val1Neg)
	m2SetPos := m2Pos.Updatei(val2Pos)
	resNeg := m1SetNeg.Sub(m2SetPos)

	vali := resNeg.Valuei()
	valf := resNeg.Valuef()

	if vali != int64(-6701) {
		t.Error("expected negative '-6701' got: ", vali)
	}

	if valf != float64(-67.01) {
		t.Error("expected negative '-67.01' got: ", valf)
	}

	// verify return values from update were set correctly
	if m1SetNeg.Valuei() != val1Neg {
		t.Error("expected negative '-1' got: ", m1SetNeg.Valuei())
	}

	if m2SetPos.Valuei() != val2Pos {
		t.Error("expected negative '6700' got: ", m2SetPos.Valuei())
	}

	// verify original values for an update were updated
	if m1Neg.Valuei() != val1Neg {
		t.Error("expected negative '-1' got: ", m1Neg.Valuei())
	}

	if m2Pos.Valuei() != val2Pos {
		t.Error("expected negative '6700' got: ", m2Pos.Valuei())
	}
}

// check division is good but also that original values are not modified
func TestMoneyDiv(t *testing.T) {
	m1 := money.Money{M: 67}   //67 cents!!
	m2 := money.Money{M: 6700} // 67 dollars
	res := m2.Div(&m1)
	finResi := int64(10000)
	finResf := float64(100.00)

	if res.Valuei() != finResi {
		t.Error("expected '10000' got: ", res.Valuei())
	}

	if res.Valuef() != finResf {
		t.Error("expected '100.00' got: ", res.Valuef())
	}

	if m1.Valuei() != int64(67) {
		t.Error("expected '67' got: ", m1.Valuei())
	}

	if m2.Valuei() != int64(6700) {
		t.Error("expected '6700' got: ", m2.Valuei())
	}

	if m1.Valuef() != float64(0.67) {
		t.Error("expected '0.67' got: ", m1.Valuef())
	}

	if m2.Valuef() != float64(67.00) {
		t.Error("expected '67.00' got: ", m2.Valuef())
	}

	if res.StringD() != "100.00" {
		t.Error("expected '100.00' got: ", res.StringD())
	}
}

func TestMoneyValueIntAndFloat(t *testing.T) {
	val := money.Money{M: 123456}

	if val.Valuei() != int64(123456) {
		t.Error("Valuei() should be int64 '123456'", val.Valuei())
	}

	if val.Valuef() != float64(1234.56) {
		t.Error("Valuef() should be float64 '123456'", val.Valuef())
	}

	if val.ValueiTrunc() != int64(1234) {
		t.Error("ValueiTrunc() should be int64 '1234'", val.ValueiTrunc())
	}

	if val.StringD() != "1234.56" {
		t.Error("money struct init StringD() should be value '1234.56'", val.StringD())
	}

	if val.StringC() != "1234,56" {
		t.Error("money struct init StringC() should be value '1234,56'", val.StringC())
	}
}