112 lines
3.5 KiB
Go
112 lines
3.5 KiB
Go
package types
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import (
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"math/big"
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"math/rand"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestFromInt64(t *testing.T) {
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for n := 0; n < 20; n++ {
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r := rand.Int63()
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require.Equal(t, r, NewInt(r).Int64())
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}
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}
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func TestInt(t *testing.T) {
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// Max Int = 2^255-1 = 5.789e+76
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// Min Int = -(2^255-1) = -5.789e+76
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require.NotPanics(t, func() { NewIntWithDecimal(1, 76) })
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i1 := NewIntWithDecimal(1, 76)
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require.NotPanics(t, func() { NewIntWithDecimal(2, 76) })
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i2 := NewIntWithDecimal(2, 76)
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require.NotPanics(t, func() { NewIntWithDecimal(3, 76) })
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i3 := NewIntWithDecimal(3, 76)
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require.Panics(t, func() { NewIntWithDecimal(6, 76) })
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require.Panics(t, func() { NewIntWithDecimal(9, 80) })
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// Overflow check
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require.NotPanics(t, func() { i1.Add(i1) })
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require.NotPanics(t, func() { i2.Add(i2) })
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require.Panics(t, func() { i3.Add(i3) })
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require.NotPanics(t, func() { i1.Sub(i1.Neg()) })
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require.NotPanics(t, func() { i2.Sub(i2.Neg()) })
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require.Panics(t, func() { i3.Sub(i3.Neg()) })
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require.Panics(t, func() { i1.Mul(i1) })
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require.Panics(t, func() { i2.Mul(i2) })
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require.Panics(t, func() { i3.Mul(i3) })
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require.Panics(t, func() { i1.Neg().Mul(i1.Neg()) })
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require.Panics(t, func() { i2.Neg().Mul(i2.Neg()) })
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require.Panics(t, func() { i3.Neg().Mul(i3.Neg()) })
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// Underflow check
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i3n := i3.Neg()
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require.NotPanics(t, func() { i3n.Sub(i1) })
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require.NotPanics(t, func() { i3n.Sub(i2) })
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require.Panics(t, func() { i3n.Sub(i3) })
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require.NotPanics(t, func() { i3n.Add(i1.Neg()) })
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require.NotPanics(t, func() { i3n.Add(i2.Neg()) })
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require.Panics(t, func() { i3n.Add(i3.Neg()) })
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require.Panics(t, func() { i1.Mul(i1.Neg()) })
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require.Panics(t, func() { i2.Mul(i2.Neg()) })
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require.Panics(t, func() { i3.Mul(i3.Neg()) })
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// Bound check
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intmax := NewIntFromBigInt(new(big.Int).Sub(new(big.Int).Exp(big.NewInt(2), big.NewInt(255), nil), big.NewInt(1)))
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intmin := intmax.Neg()
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require.NotPanics(t, func() { intmax.Add(ZeroInt()) })
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require.NotPanics(t, func() { intmin.Sub(ZeroInt()) })
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require.Panics(t, func() { intmax.Add(OneInt()) })
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require.Panics(t, func() { intmin.Sub(OneInt()) })
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// Division-by-zero check
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require.Panics(t, func() { i1.Div(NewInt(0)) })
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}
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func TestUint(t *testing.T) {
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// Max Uint = 1.15e+77
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// Min Uint = 0
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require.NotPanics(t, func() { NewUintWithDecimal(5, 76) })
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i1 := NewUintWithDecimal(5, 76)
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require.NotPanics(t, func() { NewUintWithDecimal(10, 76) })
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i2 := NewUintWithDecimal(10, 76)
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require.NotPanics(t, func() { NewUintWithDecimal(11, 76) })
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i3 := NewUintWithDecimal(11, 76)
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require.Panics(t, func() { NewUintWithDecimal(12, 76) })
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require.Panics(t, func() { NewUintWithDecimal(1, 80) })
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// Overflow check
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require.NotPanics(t, func() { i1.Add(i1) })
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require.Panics(t, func() { i2.Add(i2) })
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require.Panics(t, func() { i3.Add(i3) })
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require.Panics(t, func() { i1.Mul(i1) })
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require.Panics(t, func() { i2.Mul(i2) })
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require.Panics(t, func() { i3.Mul(i3) })
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// Underflow check
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require.NotPanics(t, func() { i2.Sub(i1) })
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require.NotPanics(t, func() { i2.Sub(i2) })
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require.Panics(t, func() { i2.Sub(i3) })
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// Bound check
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uintmax := NewUintFromBigInt(new(big.Int).Sub(new(big.Int).Exp(big.NewInt(2), big.NewInt(256), nil), big.NewInt(1)))
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uintmin := NewUint(0)
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require.NotPanics(t, func() { uintmax.Add(ZeroUint()) })
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require.NotPanics(t, func() { uintmin.Sub(ZeroUint()) })
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require.Panics(t, func() { uintmax.Add(OneUint()) })
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require.Panics(t, func() { uintmin.Sub(OneUint()) })
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// Division-by-zero check
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require.Panics(t, func() { i1.Div(uintmin) })
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}
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