github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/pkg/binlog/event/ddl_test.go (about)

     1  // Copyright 2019 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 event
    15  
    16  import (
    17  	"bytes"
    18  	"fmt"
    19  	"testing"
    20  
    21  	gmysql "github.com/go-mysql-org/go-mysql/mysql"
    22  	"github.com/pingcap/tiflow/dm/pkg/gtid"
    23  	"github.com/stretchr/testify/require"
    24  )
    25  
    26  func TestGenDDLEvent(t *testing.T) {
    27  	t.Parallel()
    28  	var (
    29  		serverID  uint32 = 101
    30  		latestPos uint32 = 123
    31  		schema           = "test_db"
    32  		table            = "test_tbl"
    33  	)
    34  
    35  	// only some simple tests in this case and we can test parsing a binlog file including common header, DDL and DML in another case.
    36  
    37  	// test CREATE/DROP table for MariaDB
    38  	flavor := gmysql.MariaDBFlavor
    39  	gSetStr := fmt.Sprintf("1-%d-3", serverID)
    40  	latestGTID, err := gtid.ParserGTID(flavor, gSetStr)
    41  	require.Nil(t, err)
    42  
    43  	// ALTER TABLE
    44  	query := fmt.Sprintf("ALTER TABLE `%s`.`%s` CHANGE COLUMN `c2` `c2` decimal(10,3)", schema, table)
    45  	result, err := GenDDLEvents(flavor, serverID, latestPos, latestGTID, schema, query, true, false, 0)
    46  	require.Nil(t, err)
    47  	require.Len(t, result.Events, 2)
    48  	require.True(t, bytes.Contains(result.Data, []byte("ALTER TABLE")))
    49  	require.True(t, bytes.Contains(result.Data, []byte(table)))
    50  	require.Equal(t, latestPos+uint32(len(result.Data)), result.LatestPos)
    51  	require.Equal(t, fmt.Sprintf("1-%d-4", serverID), result.LatestGTID.String())
    52  }