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amount_test.go
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package money
import (
"fmt"
"math"
"reflect"
"testing"
"unsafe"
"github.com/govalues/decimal"
)
func TestAmount_ZeroValue(t *testing.T) {
got := Amount{}
want := MustParseAmount("XXX", "0")
if got != want {
t.Errorf("Amount{} = %q, want %q", got, want)
}
}
func TestAmount_Size(t *testing.T) {
a := Amount{}
got := unsafe.Sizeof(a)
want := uintptr(24)
if got != want {
t.Errorf("unsafe.Sizeof(%q) = %v, want %v", a, got, want)
}
}
func TestAmount_Interfaces(t *testing.T) {
var i any = Amount{}
_, ok := i.(fmt.Stringer)
if !ok {
t.Errorf("%T does not implement fmt.Stringer", i)
}
_, ok = i.(fmt.Formatter)
if !ok {
t.Errorf("%T does not implement fmt.Formatter", i)
}
}
func TestNewAmount(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr string
coef int64
scale int
want string
}{
{"JPY", math.MinInt64, 0, "-9223372036854775808"},
{"JPY", math.MinInt64, 19, "-0.9223372036854775808"},
{"USD", math.MinInt64, 2, "-92233720368547758.08"},
{"USD", math.MinInt64, 19, "-0.9223372036854775808"},
{"OMR", math.MinInt64, 3, "-9223372036854775.808"},
{"OMR", math.MinInt64, 19, "-0.9223372036854775808"},
{"JPY", 0, 0, "0"},
{"USD", 0, 0, "0.00"},
{"OMR", 0, 0, "0.000"},
{"JPY", math.MaxInt64, 0, "9223372036854775807"},
{"JPY", math.MaxInt64, 19, "0.9223372036854775807"},
{"USD", math.MaxInt64, 2, "92233720368547758.07"},
{"USD", math.MaxInt64, 19, "0.9223372036854775807"},
{"OMR", math.MaxInt64, 3, "9223372036854775.807"},
{"OMR", math.MaxInt64, 19, "0.9223372036854775807"},
}
for _, tt := range tests {
got, err := NewAmount(tt.curr, tt.coef, tt.scale)
if err != nil {
t.Errorf("NewAmount(%q, %v, %v) failed: %v", tt.curr, tt.coef, tt.scale, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("NewAmount(%q, %v, %v) = %q, want %q", tt.curr, tt.coef, tt.scale, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
curr string
coef int64
scale int
}{
"currency 1": {"UUU", 0, 0},
"currency 2": {"ZZZ", 0, 0},
"scale range 1": {"USD", 0, -1},
"scale range 2": {"USD", 0, 20},
"overflow 1": {"USD", math.MaxInt64, 0},
"overflow 2": {"USD", math.MaxInt64, 1},
"overflow 3": {"USD", math.MinInt64, 0},
"overflow 4": {"USD", math.MinInt64, 1},
"overflow 5": {"OMR", math.MaxInt64, 0},
"overflow 6": {"OMR", math.MaxInt64, 1},
"overflow 7": {"OMR", math.MaxInt64, 2},
"overflow 8": {"OMR", math.MinInt64, 0},
"overflow 9": {"OMR", math.MinInt64, 1},
"overflow 10": {"OMR", math.MinInt64, 2},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
_, err := NewAmount(tt.curr, tt.coef, tt.scale)
if err == nil {
t.Errorf("NewAmount(%q, %v, %v) did not fail", tt.curr, tt.coef, tt.scale)
}
})
}
})
}
func TestMustNewAmount(t *testing.T) {
t.Run("error", func(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("MustNewAmount(\"USD\", 0, -1) did not panic")
}
}()
MustNewAmount("USD", 0, -1)
})
}
func TestNewAmountFromInt64(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr string
whole, frac int64
scale int
want string
}{
// Zeros
{"JPY", 0, 0, 0, "0"},
{"JPY", 0, 0, 19, "0"},
{"USD", 0, 0, 0, "0.00"},
{"USD", 0, 0, 19, "0.00"},
{"OMR", 0, 0, 0, "0.000"},
{"OMR", 0, 0, 19, "0.000"},
// Negatives
{"USD", -1, -1, 1, "-1.10"},
{"USD", -1, -1, 2, "-1.01"},
{"USD", -1, -1, 3, "-1.001"},
{"USD", -1, -1, 18, "-1.000000000000000001"},
// Positives
{"USD", 1, 1, 1, "1.10"},
{"USD", 1, 1, 2, "1.01"},
{"USD", 1, 1, 3, "1.001"},
{"USD", 1, 100000000, 9, "1.10"},
{"USD", 1, 1, 18, "1.000000000000000001"},
{"USD", 1, 1, 19, "1.000000000000000000"},
{"JPY", math.MaxInt64, math.MaxInt32, 10, "9223372036854775807"},
{"JPY", math.MaxInt64, math.MaxInt64, 19, "9223372036854775808"},
}
for _, tt := range tests {
got, err := NewAmountFromInt64(tt.curr, tt.whole, tt.frac, tt.scale)
if err != nil {
t.Errorf("NewAmountFromInt64(%q, %v, %v, %v) failed: %v", tt.curr, tt.whole, tt.frac, tt.scale, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("NewAmountFromInt64(%q, %v, %v, %v) = %q, want %q", tt.curr, tt.whole, tt.frac, tt.scale, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
curr string
whole, frac int64
scale int
}{
"currency 1": {"UUU", 0, 0, 0},
"currency 2": {"ZZZ", 0, 0, 0},
"different signs 1": {"USD", -1, 1, 0},
"fraction range 1": {"USD", 1, 1, 0},
"scale range 1": {"USD", 1, 1, -1},
"scale range 2": {"USD", 1, 0, -1},
"scale range 3": {"USD", 1, 1, 20},
"scale range 4": {"USD", 1, 0, 20},
"overflow 1": {"USD", 100000000000000000, 100000000000000000, 18},
"overflow 2": {"USD", 999999999999999999, 9, 1},
"overflow 3": {"USD", 999999999999999999, 99, 2},
"overflow 4": {"USD", math.MaxInt64, math.MaxInt32, 10},
"overflow 5": {"OMR", math.MaxInt64, math.MaxInt32, 10},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
_, err := NewAmountFromInt64(tt.curr, tt.whole, tt.frac, tt.scale)
if err == nil {
t.Errorf("NewAmountFromInt64(%q, %v, %v, %v) did not fail", tt.curr, tt.whole, tt.frac, tt.scale)
}
})
}
})
}
func TestNewAmountFromMinorUnits(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr string
units int64
want string
}{
{"JPY", math.MinInt64, "-9223372036854775808"},
{"USD", math.MinInt64, "-92233720368547758.08"},
{"OMR", math.MinInt64, "-9223372036854775.808"},
{"JPY", 0, "0"},
{"USD", 0, "0.00"},
{"OMR", 0, "0.000"},
{"JPY", math.MaxInt64, "9223372036854775807"},
{"USD", math.MaxInt64, "92233720368547758.07"},
{"OMR", math.MaxInt64, "9223372036854775.807"},
}
for _, tt := range tests {
got, err := NewAmountFromMinorUnits(tt.curr, tt.units)
if err != nil {
t.Errorf("NewAmountFromMinorUnits(%q, %v) failed: %v", tt.curr, tt.units, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("NewAmountFromMinorUnits(%q, %v) = %q, want %q", tt.curr, tt.units, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
curr string
units int64
}{
"currency 1": {"UUU", 0},
"currency 2": {"ZZZ", 0},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
_, err := NewAmountFromMinorUnits(tt.curr, tt.units)
if err == nil {
t.Errorf("NewAmountFromMinorUnits(%q, %v) did not fail", tt.curr, tt.units)
}
})
}
})
}
func TestNewAmountFromFloat64(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr string
f float64
want string
}{
// Zeros
{"JPY", 0, "0"},
{"USD", 0, "0.00"},
{"OMR", 0, "0.000"},
// Smallest non-zero
{"JPY", math.SmallestNonzeroFloat64, "0.0000000000000000000"},
{"USD", math.SmallestNonzeroFloat64, "0.0000000000000000000"},
{"OMR", math.SmallestNonzeroFloat64, "0.0000000000000000000"},
// Powers of 10
{"JPY", 1e-20, "0.0000000000000000000"},
{"USD", 1e-20, "0.0000000000000000000"},
{"OMR", 1e-20, "0.0000000000000000000"},
{"USD", 1e-19, "0.0000000000000000001"},
{"USD", 1e-5, "0.00001"},
{"USD", 1e-4, "0.0001"},
{"USD", 1e-3, "0.001"},
{"USD", 1e-2, "0.01"},
{"USD", 1e-1, "0.1"},
{"USD", 1e0, "1"},
{"USD", 1e1, "10"},
{"USD", 1e2, "100"},
{"USD", 1e3, "1000"},
{"USD", 1e4, "10000"},
{"USD", 1e5, "100000"},
{"JPY", 1e18, "1000000000000000000"},
{"USD", 1e16, "10000000000000000"},
{"OMR", 1e15, "1000000000000000"},
}
for _, tt := range tests {
got, err := NewAmountFromFloat64(tt.curr, tt.f)
if err != nil {
t.Errorf("NewAmountFromFloat64(%q, %v) failed: %v", tt.curr, tt.f, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("NewAmountFromFloat64(%q, %v) = %q, want %q", tt.curr, tt.f, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
curr string
f float64
}{
"currency 1": {"UUU", 0},
"currency 2": {"ZZZ", 0},
"overflow 1": {"JPY", 1e19},
"overflow 2": {"USD", 1e17},
"overflow 3": {"OMR", 1e16},
"special value 1": {"USD", math.NaN()},
"special value 2": {"USD", math.Inf(1)},
"special value 3": {"USD", math.Inf(-1)},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
_, err := NewAmountFromFloat64(tt.curr, tt.f)
if err == nil {
t.Errorf("NewAmountFromFloat64(%q, %v) did not fail", tt.curr, tt.f)
}
})
}
})
}
func TestNewAmountFromDecimal(t *testing.T) {
tests := []struct {
m Currency
d string
wantOk bool
}{
{JPY, "1", true},
{USD, "1.00", true},
{OMR, "1.000", true},
{JPY, "1000000000000000000", true},
{USD, "100000000000000000", false},
{OMR, "10000000000000000", false},
}
for _, tt := range tests {
amount := decimal.MustParse(tt.d)
_, err := NewAmountFromDecimal(tt.m, amount)
if !tt.wantOk && err == nil {
t.Errorf("NewAmountFromDecimal(%v, %v) did not fail", tt.m, amount)
}
if tt.wantOk && err != nil {
t.Errorf("NewAmountFromDecimal(%v, %v) failed: %v", tt.m, amount, err)
}
}
}
func TestParseAmount(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d string
wantCurr Currency
wantCoef int64
wantScale int
}{
// There are few test cases here since decimal.Parse and money.ParseCurr
// are already tested by the cases in their packages.
{"USD", "1", USD, 100, 2},
{"USD", "1.0", USD, 100, 2},
{"USD", "1.00", USD, 100, 2},
{"USD", "1.000", USD, 1000, 3},
{"USD", "1.0000", USD, 10000, 4},
{"USD", "1.00000", USD, 100000, 5},
}
for _, tt := range tests {
got, err := ParseAmount(tt.m, tt.d)
if err != nil {
t.Errorf("ParseAmount(%q, %q) failed: %v", tt.m, tt.d, err)
continue
}
wantAmount, err := decimal.New(tt.wantCoef, tt.wantScale)
if err != nil {
t.Errorf("decimal.New(%v, %v) failed: %v", tt.wantCoef, tt.wantScale, err)
continue
}
want, err := NewAmountFromDecimal(tt.wantCurr, wantAmount)
if err != nil {
t.Errorf("NewAmount(%v, %v) failed: %v", tt.wantCurr, wantAmount, err)
continue
}
if got != want {
t.Errorf("ParseAmount(%q, %q) = %q, want %q", tt.m, tt.d, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, a string
}{
"currency 1": {"///", "1"},
"currency 2": {"ZZZ", "1.0"},
"overflow 1": {"USD", "100000000000000000"},
"overflow 2": {"OMR", "10000000000000000"},
"decimal 1": {"USD", "abc"},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
_, err := ParseAmount(tt.m, tt.a)
if err == nil {
t.Errorf("ParseAmount(%q, %q) did not fail", tt.m, tt.a)
}
})
}
})
}
func TestMustParseAmount(t *testing.T) {
t.Run("error", func(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("MustParseAmount(\"UUU\", \".\") did not panic")
}
}()
MustParseAmount("UUU", ".")
})
}
func TestAmount_MinorUnits(t *testing.T) {
tests := []struct {
m, d string
wantUnits int64
wantOk bool
}{
// Different signs
{"USD", "-1", -100, true},
{"USD", "0", 0, true},
{"USD", "1", 100, true},
// Different scales
{"JPY", "1", 1, true},
{"JPY", "1.0", 1, true},
{"JPY", "1.00", 1, true},
{"JPY", "1.000", 1, true},
{"JPY", "1.0000", 1, true},
{"USD", "1", 100, true},
{"USD", "1.0", 100, true},
{"USD", "1.00", 100, true},
{"USD", "1.000", 100, true},
{"USD", "1.0000", 100, true},
{"OMR", "1", 1000, true},
{"OMR", "1.0", 1000, true},
{"OMR", "1.00", 1000, true},
{"OMR", "1.000", 1000, true},
{"OMR", "1.0000", 1000, true},
// Rounding
{"USD", "1", 100, true},
{"USD", "1.5", 150, true},
{"USD", "1.56", 156, true},
{"USD", "1.567", 157, true},
{"USD", "1.5678", 157, true},
{"USD", "1.56789", 157, true},
{"USD", "-6", -600, true},
{"USD", "-0.6", -60, true},
{"USD", "-0.06", -6, true},
{"USD", "-0.006", -1, true},
{"USD", "-0.0006", 0, true},
{"USD", "-4", -400, true},
{"USD", "-0.4", -40, true},
{"USD", "-0.04", -4, true},
{"USD", "-0.004", 0, true},
{"USD", "-0.0004", 0, true},
// Minimal value
{"USD", "-92233720368547758.08", -9223372036854775808, true},
{"USD", "-92233720368547758.09", 0, false},
// Maximal value
{"USD", "92233720368547758.07", 9223372036854775807, true},
{"USD", "92233720368547758.08", 0, false},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
gotUnits, gotOk := a.MinorUnits()
if gotUnits != tt.wantUnits || gotOk != tt.wantOk {
t.Errorf("%q.MinorUnits() = [%v %v], want [%v %v]", a, gotUnits, gotOk, tt.wantUnits, tt.wantOk)
}
}
}
func TestAmount_SameScaleAsCurr(t *testing.T) {
tests := []struct {
m, d string
want bool
}{
{"USD", "1.00", true},
{"USD", "1.000", false},
{"USD", "1.0000", false},
{"USD", "1.00000", false},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
got := a.SameScaleAsCurr()
if got != tt.want {
t.Errorf("%q.SameScaleAsCurr() = %v, want %v", a, got, tt.want)
}
}
}
func MustParseAmountSlice(curr string, amounts []string) []Amount {
res := make([]Amount, len(amounts))
for i := range len(amounts) {
res[i] = MustParseAmount(curr, amounts[i])
}
return res
}
func TestAmount_Add(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, want string
}{
// There are few test cases here since Decimal.Add
// is already tested by the cases in the decimal package.
{"USD", "1", "1", "2"},
{"USD", "2", "3", "5"},
{"USD", "5.75", "3.3", "9.05"},
{"USD", "5", "-3", "2"},
{"USD", "-5", "-3", "-8"},
{"USD", "-7", "2.5", "-4.5"},
{"USD", "0.7", "0.3", "1.0"},
{"USD", "1.25", "1.25", "2.50"},
{"USD", "1.1", "0.11", "1.21"},
{"USD", "1.234567890", "1.000000000", "2.234567890"},
{"USD", "1.234567890", "1.000000110", "2.234568000"},
{"USD", "99999999999999999.99", "0.004", "99999999999999999.99"},
{"USD", "-99999999999999999.99", "-0.004", "-99999999999999999.99"},
{"USD", "0.01", "-99999999999999999.99", "-99999999999999999.98"},
{"USD", "99999999999999999.99", "-0.01", "99999999999999999.98"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.m, tt.e)
got, err := a.Add(b)
if err != nil {
t.Errorf("%q.Add(%q) failed: %v", a, b, err)
continue
}
want := MustParseAmount(tt.m, tt.want)
if got != want {
t.Errorf("%q.Add(%q) = %q, want %q", a, b, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, n, e string
}{
"currency 1": {"USD", "1", "JPY", "1"},
"currency 2": {"USD", "1", "EUR", "1"},
"overflow 1": {"USD", "99999999999999999.99", "USD", "0.01"},
"overflow 2": {"USD", "99999999999999999.99", "USD", "0.006"},
"overflow 3": {"USD", "-99999999999999999.99", "USD", "-0.01"},
"overflow 4": {"USD", "-99999999999999999.99", "USD", "-0.006"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.n, tt.e)
_, err := a.Add(b)
if err == nil {
t.Errorf("%q.Add(%q) did not fail", a, b)
}
}
})
}
func TestAmount_Sub(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, want string
}{
// There are few test cases here since Decimal.Sub
// is already tested by the cases in the decimal package.
{"USD", "1", "1", "0"},
{"USD", "2", "1", "1"},
{"USD", "5.75", "3.3", "2.45"},
{"USD", "5", "3", "2"},
{"USD", "-5", "3", "-8"},
{"USD", "-7", "2.5", "-9.5"},
{"USD", "0.7", "0.3", "0.4"},
{"USD", "1.25", "1.25", "0.00"},
{"USD", "1.1", "0.11", "0.99"},
{"USD", "1.234567890", "1.000000000", "0.234567890"},
{"USD", "1.234567890", "1.000000110", "0.234567780"},
{"USD", "99999999999999999.99", "0.004", "99999999999999999.99"},
{"USD", "-99999999999999999.99", "-0.004", "-99999999999999999.99"},
{"USD", "0.01", "99999999999999999.99", "-99999999999999999.98"},
{"USD", "99999999999999999.99", "0.01", "99999999999999999.98"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.m, tt.e)
got, err := a.Sub(b)
if err != nil {
t.Errorf("%q.Sub(%q) failed: %v", a, b, err)
continue
}
want := MustParseAmount(tt.m, tt.want)
if got != want {
t.Errorf("%q.Sub(%q) = %q, want %q", a, b, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, n, e string
}{
"currency 1": {"USD", "1", "JPY", "1"},
"currency 2": {"USD", "1", "EUR", "1"},
"overflow 1": {"USD", "99999999999999999.99", "USD", "-0.01"},
"overflow 2": {"USD", "99999999999999999.99", "USD", "-0.006"},
"overflow 3": {"USD", "-99999999999999999.99", "USD", "0.01"},
"overflow 4": {"USD", "-99999999999999999.99", "USD", "0.006"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.n, tt.e)
_, err := a.Sub(b)
if err == nil {
t.Errorf("%q.Sub(%q) did not fail", a, b)
}
}
})
}
func TestAmount_SubAbs(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, want string
}{
{"USD", "1", "1", "0"},
{"USD", "2", "1", "1"},
{"USD", "5.75", "3.3", "2.45"},
{"USD", "5", "3", "2"},
{"USD", "-5", "3", "8"},
{"USD", "-7", "2.5", "9.5"},
{"USD", "0.7", "0.3", "0.4"},
{"USD", "1.25", "1.25", "0.00"},
{"USD", "1.1", "0.11", "0.99"},
{"USD", "1.234567890", "1.000000000", "0.234567890"},
{"USD", "1.234567890", "1.000000110", "0.234567780"},
{"USD", "99999999999999999.99", "0.004", "99999999999999999.99"},
{"USD", "-99999999999999999.99", "-0.004", "99999999999999999.99"},
{"USD", "0.01", "99999999999999999.99", "99999999999999999.98"},
{"USD", "99999999999999999.99", "0.01", "99999999999999999.98"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.m, tt.e)
got, err := a.SubAbs(b)
if err != nil {
t.Errorf("%q.SubAbs(%q) failed: %v", a, b, err)
continue
}
want := MustParseAmount(tt.m, tt.want)
if got != want {
t.Errorf("%q.SubAbs(%q) = %q, want %q", a, b, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, n, e string
}{
"currency 1": {"USD", "1", "JPY", "1"},
"currency 2": {"USD", "1", "EUR", "1"},
"overflow 1": {"USD", "99999999999999999.99", "USD", "-0.01"},
"overflow 2": {"USD", "99999999999999999.99", "USD", "-0.006"},
"overflow 3": {"USD", "-99999999999999999.99", "USD", "0.01"},
"overflow 4": {"USD", "-99999999999999999.99", "USD", "0.006"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.n, tt.e)
_, err := a.SubAbs(b)
if err == nil {
t.Errorf("%q.SubAbs(%q) did not fail", a, b)
}
}
})
}
func TestAmount_AddMul(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr, d, e, f, want string
}{
// Addition
{"USD", "1", "1", "1", "2"},
{"USD", "3", "2", "1", "5"},
{"USD", "3.3", "5.75", "1", "9.05"},
{"USD", "-3", "5", "1", "2"},
{"USD", "-3", "-5", "1", "-8"},
{"USD", "2.5", "-7", "1", "-4.5"},
{"USD", "0.3", "0.7", "1", "1.0"},
{"USD", "1.25", "1.25", "1", "2.50"},
{"USD", "0.11", "1.1", "1", "1.21"},
{"USD", "1.000000000", "1.234567890", "1", "2.234567890"},
{"USD", "1.000000110", "1.234567890", "1", "2.234568000"},
{"USD", "0.004", "99999999999999999.99", "1", "99999999999999999.99"},
{"USD", "-0.004", "-99999999999999999.99", "1", "-99999999999999999.99"},
{"USD", "-99999999999999999.99", "0.01", "1", "-99999999999999999.98"},
{"USD", "-0.01", "99999999999999999.99", "1", "99999999999999999.98"},
// Multiplication
{"USD", "0", "2", "2", "4"},
{"USD", "0", "2", "3", "6"},
{"USD", "0", "5", "1", "5"},
{"USD", "0", "5", "2", "10"},
{"USD", "0", "1.20", "2", "2.40"},
{"USD", "0", "1.20", "0", "0.00"},
{"USD", "0", "1.20", "-2", "-2.40"},
{"USD", "0", "-1.20", "2", "-2.40"},
{"USD", "0", "-1.20", "0", "0.00"},
{"USD", "0", "-1.20", "-2", "2.40"},
{"USD", "0", "5.09", "7.1", "36.139"},
{"USD", "0", "2.5", "4", "10.0"},
{"USD", "0", "2.50", "4", "10.00"},
{"USD", "0", "0.70", "1.05", "0.7350"},
}
for _, tt := range tests {
a := MustParseAmount(tt.curr, tt.d)
b := MustParseAmount(tt.curr, tt.e)
e := decimal.MustParse(tt.f)
got, err := a.AddMul(b, e)
if err != nil {
t.Errorf("%q.AddMul(%q, %q) failed: %v", a, b, e, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("%q.AddMul(%q, %q) = %q, want %q", a, b, e, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, n, e, f string
}{
"overflow 1": {"JPY", "1", "JPY", "1", "9999999999999999999"},
"overflow 2": {"JPY", "0.6", "JPY", "1", "9999999999999999999"},
"overflow 3": {"JPY", "-1", "JPY", "1", "-9999999999999999999"},
"overflow 4": {"JPY", "-0.6", "JPY", "1", "-9999999999999999999"},
"overflow 5": {"JPY", "0", "JPY", "10000000000", "1000000000"},
"overflow 6": {"JPY", "0", "JPY", "1000000000000000000", "10"},
"currency 1": {"USD", "1", "JPY", "1", "1"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.n, tt.e)
e := decimal.MustParse(tt.f)
_, err := a.AddMul(b, e)
if err == nil {
t.Errorf("%q.AddMul(%q, %q) did not fail", a, b, e)
}
}
})
}
func TestAmount_Rat(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, want string
}{
// There are few test cases here since Decimal.Quo
// is already tested by the cases in the decimal package.
{"USD", "1", "1", "1"},
{"USD", "2", "1", "2"},
{"USD", "1", "2", "0.5"},
{"USD", "2", "2", "1"},
{"USD", "0", "1", "0"},
{"USD", "0", "2", "0"},
{"USD", "1.5", "3", "0.5"},
{"USD", "3", "3", "1"},
{"USD", "2.4", "1", "2.4"},
{"USD", "2.4", "-1", "-2.4"},
{"USD", "-2.4", "1", "-2.4"},
{"USD", "-2.4", "-1", "2.4"},
{"USD", "2.40", "1", "2.4"},
{"USD", "2.400", "1", "2.4"},
{"USD", "2.4", "2", "1.2"},
{"USD", "2.400", "2", "1.2"},
{"USD", "99999999999999999.99", "1", "99999999999999999.99"},
{"USD", "99999999999999999.99", "99999999999999999.99", "1"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.m, tt.e)
got, err := a.Rat(b)
if err != nil {
t.Errorf("%q.Rat(%q) failed: %v", a, b, err)
continue
}
want := decimal.MustParse(tt.want)
if got != want {
t.Errorf("%q.Rat(%q) = %q, want %q", a, b, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, n, e string
}{
"overflow 1": {"USD", "10000000000000000", "USD", "0.001"},
"zero 1": {"USD", "1", "USD", "0"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
b := MustParseAmount(tt.n, tt.e)
_, err := a.Rat(b)
if err == nil {
t.Errorf("%q.Rat(%q) did not fail", a, b)
}
}
})
}
func TestAmount_Quo(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, want string
}{
// There are few test cases here since Decimal.Quo
// is already tested by the cases in the decimal package.
{"USD", "1", "1", "1"},
{"USD", "2", "1", "2"},
{"USD", "1", "2", "0.5"},
{"USD", "2", "2", "1"},
{"USD", "0", "1", "0"},
{"USD", "0", "2", "0"},
{"USD", "1.5", "3", "0.5"},
{"USD", "3", "3", "1"},
{"USD", "2.4", "1", "2.4"},
{"USD", "2.4", "-1", "-2.4"},
{"USD", "-2.4", "1", "-2.4"},
{"USD", "-2.4", "-1", "2.4"},
{"USD", "2.40", "1", "2.40"},
{"USD", "2.400", "1", "2.400"},
{"USD", "2.4", "2", "1.2"},
{"USD", "2.400", "2", "1.200"},
{"USD", "99999999999999999.99", "1", "99999999999999999.99"},
{"USD", "99999999999999999.99", "99999999999999999.99", "1"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
e := decimal.MustParse(tt.e)
got, err := a.Quo(e)
if err != nil {
t.Errorf("%q.Quo(%q) failed: %v", a, e, err)
continue
}
want := MustParseAmount(tt.m, tt.want)
if got != want {
t.Errorf("%q.Quo(%q) = %q, want %q", a, e, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, e string
}{
"zero 1": {"USD", "1", "0"},
"overflow 1": {"USD", "99999999999999999", "0.1"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
e := decimal.MustParse(tt.e)
_, err := a.Quo(e)
if err == nil {
t.Errorf("%q.Quo(%q) did not fail", a, e)
}
}
})
}
func TestAmount_QuoRem(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d, e, wantQuo, wantRem string
}{
{"USD", "0.00", "1", "0.00", "0.00"},
{"USD", "1.00", "1", "1.00", "0.00"},
{"USD", "1.01", "1", "1.01", "0.00"},
{"USD", "2.00", "1", "2.00", "0.00"},
{"USD", "2.01", "1", "2.01", "0.00"},
{"USD", "1.00", "2", "0.50", "0.00"},
{"USD", "1.01", "2", "0.50", "0.01"},
{"USD", "2.00", "2", "1.00", "0.00"},
{"USD", "2.01", "2", "1.00", "0.01"},
{"USD", "1.510", "3", "0.50", "0.010"},
{"USD", "3.333", "3", "1.11", "0.003"},
{"USD", "2.401", "1", "2.40", "0.001"},
{"USD", "2.401", "-1", "-2.40", "0.001"},
{"USD", "-2.401", "1", "-2.40", "-0.001"},
{"USD", "-2.401", "-1", "2.40", "-0.001"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
e := decimal.MustParse(tt.e)
gotQuo, gotRem, err := a.QuoRem(e)
if err != nil {
t.Errorf("%q.QuoRem(%q) failed: %v", a, e, err)
continue
}
wantQuo := MustParseAmount(tt.m, tt.wantQuo)
wantRem := MustParseAmount(tt.m, tt.wantRem)
if gotQuo != wantQuo || gotRem != wantRem {
t.Errorf("%q.QuoRem(%q) = [%q %q], want [%q %q]", a, e, gotQuo, gotRem, wantQuo, wantRem)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, e string
}{
"zero 1": {"USD", "1", "0"},
"overflow 1": {"USD", "99999999999999999", "0.1"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
e := decimal.MustParse(tt.e)
_, _, err := a.QuoRem(e)
if err == nil {
t.Errorf("%q.QuoRem(%q) did not fail", a, e)
}
}
})
}
func TestAmount_Mul(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
curr, a, e, want string
}{
// There are few test cases here since Decimal.Mul
// is already tested by the cases in the decimal package.
{"USD", "2", "2", "4"},
{"USD", "2", "3", "6"},
{"USD", "5", "1", "5"},
{"USD", "5", "2", "10"},
{"USD", "1.20", "2", "2.40"},
{"USD", "1.20", "0", "0.00"},
{"USD", "1.20", "-2", "-2.40"},
{"USD", "-1.20", "2", "-2.40"},
{"USD", "-1.20", "0", "0.00"},
{"USD", "-1.20", "-2", "2.40"},
{"USD", "5.09", "7.1", "36.139"},
{"USD", "2.5", "4", "10.0"},
{"USD", "2.50", "4", "10.00"},
{"USD", "0.70", "1.05", "0.7350"},
}
for _, tt := range tests {
a := MustParseAmount(tt.curr, tt.a)
e := decimal.MustParse(tt.e)
got, err := a.Mul(e)
if err != nil {
t.Errorf("%q.Mul(%q) failed: %v", a, e, err)
continue
}
want := MustParseAmount(tt.curr, tt.want)
if got != want {
t.Errorf("%q.Mul(%q) = %q, want %q", a, e, got, want)
}
}
})
t.Run("error", func(t *testing.T) {
tests := map[string]struct {
m, d, e string
}{
"overflow 1": {"USD", "10000000000", "1000000000"},
"overflow 2": {"USD", "10000000000000000", "1000"},
}
for _, tt := range tests {
a := MustParseAmount(tt.m, tt.d)
e := decimal.MustParse(tt.e)
_, err := a.Mul(e)
if err == nil {
t.Errorf("%q.Mul(%q) did not fail", a, e)
}
}
})
}
func TestAmount_Split(t *testing.T) {
t.Run("success", func(t *testing.T) {
tests := []struct {
m, d string
parts int
want []string
}{