github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/pkg/sink/codec/craft/codec_test.go (about)

     1  // Copyright 2021 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package craft
    15  
    16  import (
    17  	"math/rand"
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/pingcap/tiflow/pkg/leakutil"
    22  	"github.com/stretchr/testify/require"
    23  )
    24  
    25  func init() {
    26  	rand.Seed(time.Now().UnixNano())
    27  }
    28  
    29  func TestMain(m *testing.M) {
    30  	leakutil.SetUpLeakTest(m)
    31  }
    32  
    33  func TestSizeTable(t *testing.T) {
    34  	t.Parallel()
    35  
    36  	tables := [][]int64{
    37  		{
    38  			1, 3, 5, 7, 9,
    39  		},
    40  		{
    41  			2, 4, 6, 8, 10,
    42  		},
    43  	}
    44  	bits := make([]byte, 16)
    45  	rand.Read(bits)
    46  	bits = encodeSizeTables(bits, tables)
    47  
    48  	size, decoded, err := decodeSizeTables(bits, NewSliceAllocator(64))
    49  	require.Nil(t, err)
    50  	require.Equal(t, tables, decoded)
    51  	require.Equal(t, len(bits)-16, size)
    52  }
    53  
    54  func TestUvarintReverse(t *testing.T) {
    55  	t.Parallel()
    56  
    57  	var i uint64 = 0
    58  
    59  	for i < 0x8000000000000000 {
    60  		bits := make([]byte, 16)
    61  		rand.Read(bits)
    62  		bits, bytes1 := encodeUvarintReversed(bits, i)
    63  		bytes2, u64, err := decodeUvarintReversed(bits)
    64  		require.Nil(t, err)
    65  		require.Equal(t, i, u64)
    66  		require.Equal(t, len(bits)-16, bytes1)
    67  		require.Equal(t, bytes2, bytes1)
    68  		if i == 0 {
    69  			i = 1
    70  		} else {
    71  			i <<= 1
    72  		}
    73  	}
    74  }
    75  
    76  func newNullableString(a string) *string {
    77  	return &a
    78  }
    79  
    80  func TestEncodeChunk(t *testing.T) {
    81  	t.Parallel()
    82  
    83  	stringChunk := []string{"a", "b", "c"}
    84  	nullableStringChunk := []*string{newNullableString("a"), newNullableString("b"), newNullableString("c")}
    85  	int64Chunk := []int64{1, 2, 3}
    86  	allocator := NewSliceAllocator(64)
    87  
    88  	bits := encodeStringChunk(nil, stringChunk)
    89  	bits, decodedStringChunk, err := decodeStringChunk(bits, 3, allocator)
    90  	require.Nil(t, err)
    91  	require.Equal(t, 0, len(bits))
    92  	require.Equal(t, stringChunk, decodedStringChunk)
    93  
    94  	bits = encodeNullableStringChunk(nil, nullableStringChunk)
    95  	bits, decodedNullableStringChunk, err := decodeNullableStringChunk(bits, 3, allocator)
    96  	require.Nil(t, err)
    97  	require.Equal(t, 0, len(bits))
    98  	require.Equal(t, nullableStringChunk, decodedNullableStringChunk)
    99  
   100  	bits = encodeVarintChunk(nil, int64Chunk)
   101  	bits, decodedVarintChunk, err := decodeVarintChunk(bits, 3, allocator)
   102  	require.Nil(t, err)
   103  	require.Equal(t, 0, len(bits))
   104  	require.Equal(t, int64Chunk, decodedVarintChunk)
   105  }