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package bitio_test
import (
"fmt"
"testing"
"github.com/wader/fq/pkg/bitio"
)
func TestReverseBytes64Panic(t *testing.T) {
// TODO: check panic string
defer func() { _ = recover() }()
bitio.Read64([]byte{}, 0, 65)
t.Error("should panic")
}
func TestReverseBytes64(t *testing.T) {
testCases := []struct {
nBits int
n uint64
expected uint64
}{
{nBits: 0, n: 0, expected: 0},
{nBits: 8, n: 0x01, expected: 0x01},
{nBits: 16, n: 0x0123, expected: 0x2301},
{nBits: 24, n: 0x012345, expected: 0x452301},
{nBits: 32, n: 0x01234567, expected: 0x67452301},
{nBits: 40, n: 0x0123456789, expected: 0x8967452301},
{nBits: 48, n: 0x0123456789ab, expected: 0xab8967452301},
{nBits: 56, n: 0x0123456789abcd, expected: 0xcdab8967452301},
{nBits: 64, n: 0x0123456789abcdef, expected: 0xefcdab8967452301},
}
for _, tC := range testCases {
t.Run(fmt.Sprintf("%d %x %x", tC.nBits, tC.n, tC.expected), func(t *testing.T) {
actual := bitio.ReverseBytes64(tC.nBits, tC.n)
if tC.expected != actual {
t.Errorf("expected %x, got %x", tC.expected, actual)
}
})
}
}
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