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package bswap
import (
"encoding/binary"
"io"
"math/rand"
"testing"
)
func TestSwap64(t *testing.T) {
input := make([]byte, 4096)
prng := rand.New(rand.NewSource(0))
io.ReadFull(prng, input)
output := make([]byte, 4096)
for i := 0; i < 4096; i += 8 {
copy(output, input)
Swap64(output[:i])
for j := 0; j < i; j += 8 {
u1 := binary.BigEndian.Uint64(input[j:])
u2 := binary.LittleEndian.Uint64(output[j:])
if u1 != u2 {
t.Fatalf("bytes weren't swapped at offset %d: %v / %v", i, u1, u2)
}
}
}
}
func BenchmarkSwap64(b *testing.B) {
input := make([]byte, 64*1024)
prng := rand.New(rand.NewSource(0))
io.ReadFull(prng, input)
b.SetBytes(int64(len(input)))
b.ResetTimer()
for i := 0; i < b.N; i++ {
Swap64(input)
}
}
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