github.com/pingcap/failpoint@v0.0.0-20240412033321-fd0796e60f86/failpoint_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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package failpoint_test
    16  
    17  import (
    18  	"context"
    19  	"sync"
    20  	"testing"
    21  	"time"
    22  
    23  	"github.com/pingcap/failpoint"
    24  	"github.com/stretchr/testify/require"
    25  )
    26  
    27  func TestWithHook(t *testing.T) {
    28  	err := failpoint.Enable("TestWithHook-test-0", "return(1)")
    29  	require.NoError(t, err)
    30  
    31  	val, err := failpoint.EvalContext(context.Background(), "TestWithHook-test-0")
    32  	require.Nil(t, val)
    33  	require.Error(t, err)
    34  
    35  	val, err = failpoint.EvalContext(nil, "TestWithHook-test-0")
    36  	require.Nil(t, val)
    37  	require.Error(t, err)
    38  
    39  	ctx := failpoint.WithHook(context.Background(), func(ctx context.Context, fpname string) bool {
    40  		return false
    41  	})
    42  	val, err = failpoint.EvalContext(ctx, "unit-test")
    43  	require.Error(t, err)
    44  	require.Nil(t, val)
    45  
    46  	ctx = failpoint.WithHook(context.Background(), func(ctx context.Context, fpname string) bool {
    47  		return true
    48  	})
    49  	err = failpoint.Enable("TestWithHook-test-1", "return(1)")
    50  	require.NoError(t, err)
    51  	defer func() {
    52  		err := failpoint.Disable("TestWithHook-test-1")
    53  		require.NoError(t, err)
    54  	}()
    55  	val, err = failpoint.EvalContext(ctx, "TestWithHook-test-1")
    56  	require.NoError(t, err)
    57  	require.Equal(t, 1, val.(int))
    58  }
    59  
    60  func TestConcurrent(t *testing.T) {
    61  	err := failpoint.Enable("TestWithHook-test-2", "pause")
    62  	require.NoError(t, err)
    63  	var wg sync.WaitGroup
    64  	wg.Add(1)
    65  	go func() {
    66  		ctx := failpoint.WithHook(context.Background(), func(ctx context.Context, fpname string) bool {
    67  			return true
    68  		})
    69  		val, _ := failpoint.EvalContext(ctx, "TestWithHook-test-2")
    70  		require.Nil(t, val)
    71  		wg.Done()
    72  	}()
    73  	time.Sleep(1 * time.Second)
    74  	err = failpoint.Enable("TestWithHook-test-3", "return(1)")
    75  	require.NoError(t, err)
    76  	err = failpoint.Disable("TestWithHook-test-3")
    77  	require.NoError(t, err)
    78  	err = failpoint.Disable("TestWithHook-test-2")
    79  	require.NoError(t, err)
    80  	wg.Wait()
    81  }