uint128_test.go
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package ksuid
import (
"fmt"
"testing"
)
func TestCmp128(t *testing.T) {
tests := []struct {
x uint128
y uint128
k int
}{
{
x: makeUint128(0, 0),
y: makeUint128(0, 0),
k: 0,
},
{
x: makeUint128(0, 1),
y: makeUint128(0, 0),
k: +1,
},
{
x: makeUint128(0, 0),
y: makeUint128(0, 1),
k: -1,
},
{
x: makeUint128(1, 0),
y: makeUint128(0, 1),
k: +1,
},
{
x: makeUint128(0, 1),
y: makeUint128(1, 0),
k: -1,
},
}
for _, test := range tests {
t.Run(fmt.Sprintf("cmp128(%s,%s)", test.x, test.y), func(t *testing.T) {
if k := cmp128(test.x, test.y); k != test.k {
t.Error(k, "!=", test.k)
}
})
}
}
func TestAdd128(t *testing.T) {
tests := []struct {
x uint128
y uint128
z uint128
}{
{
x: makeUint128(0, 0),
y: makeUint128(0, 0),
z: makeUint128(0, 0),
},
{
x: makeUint128(0, 1),
y: makeUint128(0, 0),
z: makeUint128(0, 1),
},
{
x: makeUint128(0, 0),
y: makeUint128(0, 1),
z: makeUint128(0, 1),
},
{
x: makeUint128(1, 0),
y: makeUint128(0, 1),
z: makeUint128(1, 1),
},
{
x: makeUint128(0, 1),
y: makeUint128(1, 0),
z: makeUint128(1, 1),
},
{
x: makeUint128(0, 0xFFFFFFFFFFFFFFFF),
y: makeUint128(0, 1),
z: makeUint128(1, 0),
},
}
for _, test := range tests {
t.Run(fmt.Sprintf("add128(%s,%s)", test.x, test.y), func(t *testing.T) {
if z := add128(test.x, test.y); z != test.z {
t.Error(z, "!=", test.z)
}
})
}
}
func TestSub128(t *testing.T) {
tests := []struct {
x uint128
y uint128
z uint128
}{
{
x: makeUint128(0, 0),
y: makeUint128(0, 0),
z: makeUint128(0, 0),
},
{
x: makeUint128(0, 1),
y: makeUint128(0, 0),
z: makeUint128(0, 1),
},
{
x: makeUint128(0, 0),
y: makeUint128(0, 1),
z: makeUint128(0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF),
},
{
x: makeUint128(1, 0),
y: makeUint128(0, 1),
z: makeUint128(0, 0xFFFFFFFFFFFFFFFF),
},
{
x: makeUint128(0, 1),
y: makeUint128(1, 0),
z: makeUint128(0xFFFFFFFFFFFFFFFF, 1),
},
{
x: makeUint128(0, 0xFFFFFFFFFFFFFFFF),
y: makeUint128(0, 1),
z: makeUint128(0, 0xFFFFFFFFFFFFFFFE),
},
}
for _, test := range tests {
t.Run(fmt.Sprintf("sub128(%s,%s)", test.x, test.y), func(t *testing.T) {
if z := sub128(test.x, test.y); z != test.z {
t.Error(z, "!=", test.z)
}
})
}
}
func BenchmarkCmp128(b *testing.B) {
x := makeUint128(0, 0)
y := makeUint128(0, 0)
for i := 0; i != b.N; i++ {
cmp128(x, y)
}
}
func BenchmarkAdd128(b *testing.B) {
x := makeUint128(0, 0)
y := makeUint128(0, 0)
for i := 0; i != b.N; i++ {
add128(x, y)
}
}
func BenchmarkSub128(b *testing.B) {
x := makeUint128(0, 0)
y := makeUint128(0, 0)
for i := 0; i != b.N; i++ {
sub128(x, y)
}
}