github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/pkg/spanz/convert_test.go (about)

     1  // Copyright 2022 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 spanz
    15  
    16  import (
    17  	"testing"
    18  
    19  	"github.com/pingcap/tiflow/cdc/processor/tablepb"
    20  	"github.com/stretchr/testify/require"
    21  )
    22  
    23  func TestHashableSpan(t *testing.T) {
    24  	t.Parallel()
    25  
    26  	// Make sure it can be a map key.
    27  	m := make(map[hashableSpan]int)
    28  	m[hashableSpan{}] = 1
    29  	require.Equal(t, 1, m[hashableSpan{}])
    30  
    31  	span := toHashableSpan(TableIDToComparableSpan(1))
    32  	require.EqualValues(t, TableIDToComparableSpan(1), span.toSpan())
    33  }
    34  
    35  func TestHashableSpanHeapAlloc(t *testing.T) {
    36  	span := tablepb.Span{TableID: 1}
    37  	for i := 0; i < 10; i++ {
    38  		span.StartKey = append(span.StartKey, byte(i))
    39  		span.EndKey = append(span.EndKey, byte(i))
    40  	}
    41  
    42  	n := 0
    43  	results := testing.Benchmark(func(b *testing.B) {
    44  		n = b.N
    45  		b.ReportAllocs()
    46  		b.ResetTimer()
    47  		for i := 0; i < b.N; i++ {
    48  			hspan := toHashableSpan(span)
    49  			span = hspan.toSpan()
    50  		}
    51  	})
    52  	require.EqualValues(t, 0, results.MemAllocs/uint64(n))
    53  }
    54  
    55  func TestUnsafeStringByte(t *testing.T) {
    56  	b := []byte("unsafe bytes")
    57  	s := "unsafe bytes"
    58  
    59  	us := unsafeBytesToString(b)
    60  	require.EqualValues(t, s, us)
    61  	require.EqualValues(t, len(b), len(us))
    62  
    63  	ub := unsafeStringToBytes(s)
    64  	require.EqualValues(t, b, ub)
    65  	require.EqualValues(t, len(s), len(ub))
    66  	require.EqualValues(t, len(s), cap(ub))
    67  }
    68  
    69  func TestHexKey(t *testing.T) {
    70  	span := TableIDToComparableSpan(8616)
    71  	require.Equal(t, "7480000000000021FFA85F720000000000FA", HexKey(span.StartKey))
    72  	require.Equal(t, "7480000000000021FFA85F730000000000FA", HexKey(span.EndKey))
    73  }