github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/pkg/utils/common_test.go (about)

     1  // Copyright 2020 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 utils
    15  
    16  import (
    17  	"bytes"
    18  	"sync"
    19  	"testing"
    20  
    21  	"github.com/pingcap/tidb/pkg/parser"
    22  	"github.com/pingcap/tiflow/dm/pkg/log"
    23  	"github.com/stretchr/testify/require"
    24  	"go.uber.org/zap"
    25  )
    26  
    27  func TestTrimCtrlChars(t *testing.T) {
    28  	t.Parallel()
    29  
    30  	ddl := "create table if not exists foo.bar(id int)"
    31  	controlChars := make([]byte, 0, 33)
    32  	nul := byte(0x00)
    33  	for i := 0; i < 32; i++ {
    34  		controlChars = append(controlChars, nul)
    35  		nul++
    36  	}
    37  	controlChars = append(controlChars, 0x7f)
    38  
    39  	parser2 := parser.New()
    40  	var buf bytes.Buffer
    41  	for _, char := range controlChars {
    42  		buf.WriteByte(char)
    43  		buf.WriteByte(char)
    44  		buf.WriteString(ddl)
    45  		buf.WriteByte(char)
    46  		buf.WriteByte(char)
    47  
    48  		newDDL := TrimCtrlChars(buf.String())
    49  		require.Equal(t, ddl, newDDL)
    50  
    51  		_, err := parser2.ParseOneStmt(newDDL, "", "")
    52  		require.NoError(t, err)
    53  		buf.Reset()
    54  	}
    55  }
    56  
    57  func TestTrimQuoteMark(t *testing.T) {
    58  	t.Parallel()
    59  
    60  	cases := [][]string{
    61  		{`"123"`, `123`},
    62  		{`123`, `123`},
    63  		{`"123`, `"123`},
    64  		{`'123'`, `'123'`},
    65  	}
    66  	for _, ca := range cases {
    67  		require.Equal(t, TrimQuoteMark(ca[0]), ca[1])
    68  	}
    69  }
    70  
    71  func TestCompareShardingDDLs(t *testing.T) {
    72  	t.Parallel()
    73  
    74  	var (
    75  		DDL1 = "alter table add column c1 int"
    76  		DDL2 = "alter table add column c2 text"
    77  	)
    78  
    79  	// different DDLs
    80  	require.False(t, CompareShardingDDLs([]string{DDL1}, []string{DDL2}))
    81  
    82  	// different length
    83  	require.False(t, CompareShardingDDLs([]string{DDL1, DDL2}, []string{DDL2}))
    84  
    85  	// same DDLs
    86  	require.True(t, CompareShardingDDLs([]string{DDL1}, []string{DDL1}))
    87  	require.True(t, CompareShardingDDLs([]string{DDL1, DDL2}, []string{DDL1, DDL2}))
    88  
    89  	// same contents but different order
    90  	require.True(t, CompareShardingDDLs([]string{DDL1, DDL2}, []string{DDL2, DDL1}))
    91  }
    92  
    93  func TestDDLLockID(t *testing.T) {
    94  	t.Parallel()
    95  
    96  	task := "test"
    97  	id := GenDDLLockID(task, "db", "tbl")
    98  	require.Equal(t, "test-`db`.`tbl`", id)
    99  	require.Equal(t, task, ExtractTaskFromLockID(id))
   100  
   101  	id = GenDDLLockID(task, "d`b", "tb`l")
   102  	require.Equal(t, "test-`d``b`.`tb``l`", id)
   103  	require.Equal(t, task, ExtractTaskFromLockID(id))
   104  
   105  	// invalid ID
   106  	require.Equal(t, "", ExtractTaskFromLockID("invalid-lock-id"))
   107  }
   108  
   109  func TestNonRepeatStringsEqual(t *testing.T) {
   110  	t.Parallel()
   111  
   112  	require.True(t, NonRepeatStringsEqual([]string{}, []string{}))
   113  	require.True(t, NonRepeatStringsEqual([]string{"1", "2"}, []string{"2", "1"}))
   114  	require.False(t, NonRepeatStringsEqual([]string{}, []string{"1"}))
   115  	require.False(t, NonRepeatStringsEqual([]string{"1", "2"}, []string{"2", "3"}))
   116  }
   117  
   118  func TestGoLogWrapper(t *testing.T) {
   119  	var wg sync.WaitGroup
   120  	wg.Add(1)
   121  	// to avoid data race since there's concurrent test case writing log.L()
   122  	l := log.Logger{Logger: zap.NewNop()}
   123  	go GoLogWrapper(l, func() {
   124  		defer wg.Done()
   125  		panic("should be captured")
   126  	})
   127  	wg.Wait()
   128  	// if GoLogWrapper didn't catch it, this case will fail.
   129  }