github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/pkg/func-rollback/rollback_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 rollback
    15  
    16  import (
    17  	"fmt"
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/require"
    21  )
    22  
    23  func TestRollback(t *testing.T) {
    24  	t.Parallel()
    25  	var (
    26  		h        = NewRollbackHolder("test")
    27  		total    = 5
    28  		count    = total
    29  		obtained = make([]int, 0, total)
    30  		expected = make([]int, 0, total)
    31  		rf       = func() {
    32  			count--
    33  			obtained = append(obtained, count)
    34  		}
    35  	)
    36  	for i := total - 1; i >= 0; i-- {
    37  		expected = append(expected, i) // [4, 3, 2, 1, 0]
    38  	}
    39  
    40  	for i := 0; i < total; i++ {
    41  		h.Add(FuncRollback{Name: fmt.Sprintf("test-%d", i), Fn: rf})
    42  	}
    43  	h.RollbackReverseOrder()
    44  	require.Equal(t, expected, obtained)
    45  }