fumiama/unibase2n
1
0
Fork 0
mirror of https://github.com/fumiama/unibase2n.git synced 2026-06-10 19:50:25 +08:00
Code Activity

finish uint128be unit test

Browse Source
This commit is contained in:
源文雨
2022-09-30 23:39:25 +08:00
parent 7778760145
commit 185ecc90a2
1 changed files with 29 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
uint128be_test.go Normal file
View File

@@ -0,0 +1,29 @@
package unibase2n
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestUint128be(t *testing.T) {
buf := [16]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
zero := readuint128be(make([]byte, 16))
one := readuint128be([]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1})
num := readuint128be(buf[:])
num.add(one)
assert.Equal(t, num, zero)
num.add(readuint128be([]byte{0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef}))
num.shr(8)
assert.Equal(t, num, &uint128be{0x001234567890abcd, 0xef1234567890abcd})
num.shr(16)
assert.Equal(t, num, &uint128be{0x0000001234567890, 0xabcdef1234567890})
num.shr(32)
assert.Equal(t, num, &uint128be{0x0000000000000012, 0x34567890abcdef12})
num.shr(1)
// 因为 num.a 低 1 位为 0 所以可以成功
assert.Equal(t, num, &uint128be{0x0000000000000012 >> 1, 0x34567890abcdef12 >> 1})
num.shr(7)
num.write(buf[:])
assert.Equal(t, buf, [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef})
}