121 lines
4.1 KiB
Go
121 lines
4.1 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package codec
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestFastSlowFastReverse(t *testing.T) {
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if !supportsUnaligned {
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return
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}
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b := []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}
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r1 := b
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fastReverseBytes(b)
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r2 := b
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reverseBytes(r2)
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require.Equal(t, r1, r2)
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}
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func TestBytesCodec(t *testing.T) {
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inputs := []struct {
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enc []byte
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dec []byte
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desc bool
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}{
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{[]byte{}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
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{[]byte{}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
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{[]byte{0}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 248}, false},
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{[]byte{0}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 7}, true},
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{[]byte{1, 2, 3}, []byte{1, 2, 3, 0, 0, 0, 0, 0, 250}, false},
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{[]byte{1, 2, 3}, []byte{254, 253, 252, 255, 255, 255, 255, 255, 5}, true},
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{[]byte{1, 2, 3, 0}, []byte{1, 2, 3, 0, 0, 0, 0, 0, 251}, false},
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{[]byte{1, 2, 3, 0}, []byte{254, 253, 252, 255, 255, 255, 255, 255, 4}, true},
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{[]byte{1, 2, 3, 4, 5, 6, 7}, []byte{1, 2, 3, 4, 5, 6, 7, 0, 254}, false},
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{[]byte{1, 2, 3, 4, 5, 6, 7}, []byte{254, 253, 252, 251, 250, 249, 248, 255, 1}, true},
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{[]byte{0, 0, 0, 0, 0, 0, 0, 0}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
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{[]byte{0, 0, 0, 0, 0, 0, 0, 0}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
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{[]byte{1, 2, 3, 4, 5, 6, 7, 8}, []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
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{[]byte{1, 2, 3, 4, 5, 6, 7, 8}, []byte{254, 253, 252, 251, 250, 249, 248, 247, 0, 255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
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{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9}, []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 9, 0, 0, 0, 0, 0, 0, 0, 248}, false},
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{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9}, []byte{254, 253, 252, 251, 250, 249, 248, 247, 0, 246, 255, 255, 255, 255, 255, 255, 255, 7}, true},
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}
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for _, input := range inputs {
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require.Len(t, input.dec, EncodedBytesLength(len(input.enc)))
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if input.desc {
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b := EncodeBytesDesc(nil, input.enc)
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require.Equal(t, input.dec, b)
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_, d, err := DecodeBytesDesc(b, nil)
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require.NoError(t, err)
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require.Equal(t, input.enc, d)
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} else {
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b := EncodeBytes(nil, input.enc)
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require.Equal(t, input.dec, b)
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_, d, err := DecodeBytes(b, nil)
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require.NoError(t, err)
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require.Equal(t, input.enc, d)
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}
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}
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// Test error decode.
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errInputs := [][]byte{
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{1, 2, 3, 4},
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{0, 0, 0, 0, 0, 0, 0, 247},
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{0, 0, 0, 0, 0, 0, 0, 0, 246},
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{0, 0, 0, 0, 0, 0, 0, 1, 247},
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{1, 2, 3, 4, 5, 6, 7, 8, 0},
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{1, 2, 3, 4, 5, 6, 7, 8, 255, 1},
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{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8},
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{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8, 255},
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{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8, 0},
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}
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for _, input := range errInputs {
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_, _, err := DecodeBytes(input, nil)
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require.Error(t, err)
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}
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}
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func TestBytesCodecExt(t *testing.T) {
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inputs := []struct {
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enc []byte
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dec []byte
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}{
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{[]byte{}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 247}},
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{[]byte{1, 2, 3}, []byte{1, 2, 3, 0, 0, 0, 0, 0, 250}},
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{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9}, []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 9, 0, 0, 0, 0, 0, 0, 0, 248}},
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}
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// `assertEqual` is to deal with test case for `[]byte{}` & `[]byte(nil)`.
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assertEqual := func(expected []byte, acutal []byte) {
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require.Equal(t, len(expected), len(acutal))
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for i := range expected {
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require.Equal(t, expected[i], acutal[i])
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}
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}
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for _, input := range inputs {
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assertEqual(input.enc, EncodeBytesExt(nil, input.enc, true))
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assertEqual(input.dec, EncodeBytesExt(nil, input.enc, false))
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}
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}
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