github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/engine/pkg/client/internal/call_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 internal
    15  
    16  import (
    17  	"context"
    18  	"sync"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/require"
    22  	"google.golang.org/grpc"
    23  	"google.golang.org/grpc/codes"
    24  	"google.golang.org/grpc/status"
    25  )
    26  
    27  type mockRequest struct {
    28  	val int
    29  }
    30  
    31  type mockResponse struct {
    32  	val int
    33  }
    34  
    35  func TestCallNormal(t *testing.T) {
    36  	t.Parallel()
    37  
    38  	mockCallFn := func(ctx context.Context, req *mockRequest, opts ...grpc.CallOption) (*mockResponse, error) {
    39  		return &mockResponse{
    40  			val: req.val,
    41  		}, nil
    42  	}
    43  
    44  	call := NewCall(mockCallFn, &mockRequest{val: 1})
    45  	resp, err := call.Do(context.Background())
    46  	require.NoError(t, err)
    47  	require.Equal(t, &mockResponse{val: 1}, resp)
    48  }
    49  
    50  func TestCallFuncCancel(t *testing.T) {
    51  	t.Parallel()
    52  
    53  	mockCallFn := func(ctx context.Context, req *mockRequest, opts ...grpc.CallOption) (*mockResponse, error) {
    54  		<-ctx.Done()
    55  		return nil, ctx.Err()
    56  	}
    57  
    58  	call := NewCall(mockCallFn, &mockRequest{val: 1})
    59  	ctx, cancel := context.WithCancel(context.Background())
    60  
    61  	var wg sync.WaitGroup
    62  	wg.Add(1)
    63  	go func() {
    64  		defer wg.Done()
    65  
    66  		resp, err := call.Do(ctx)
    67  		require.Nil(t, resp)
    68  		require.Error(t, err)
    69  		require.ErrorIs(t, err, context.Canceled)
    70  	}()
    71  
    72  	cancel()
    73  	wg.Wait()
    74  }
    75  
    76  func TestCallRetryCancel(t *testing.T) {
    77  	t.Parallel()
    78  
    79  	mockCallFn := func(ctx context.Context, req *mockRequest, opts ...grpc.CallOption) (*mockResponse, error) {
    80  		return nil, status.Error(codes.Unavailable, "")
    81  	}
    82  
    83  	call := NewCall(mockCallFn, &mockRequest{val: 1})
    84  	ctx, cancel := context.WithCancel(context.Background())
    85  
    86  	var wg sync.WaitGroup
    87  	wg.Add(1)
    88  	go func() {
    89  		defer wg.Done()
    90  
    91  		resp, err := call.Do(ctx)
    92  		require.Nil(t, resp)
    93  		require.Error(t, err)
    94  		require.ErrorIs(t, err, context.Canceled)
    95  	}()
    96  
    97  	cancel()
    98  	wg.Wait()
    99  }
   100  
   101  func TestCallRetrySucceed(t *testing.T) {
   102  	t.Parallel()
   103  
   104  	retryCount := 0
   105  	mockCallFn := func(ctx context.Context, req *mockRequest, opts ...grpc.CallOption) (*mockResponse, error) {
   106  		if retryCount < 5 {
   107  			retryCount++
   108  		} else {
   109  			return &mockResponse{val: req.val}, nil
   110  		}
   111  		return nil, status.Error(codes.Unavailable, "")
   112  	}
   113  
   114  	call := NewCall(mockCallFn, &mockRequest{val: 1})
   115  	resp, err := call.Do(context.Background())
   116  	require.NoError(t, err)
   117  	require.Equal(t, &mockResponse{val: 1}, resp)
   118  }
   119  
   120  func TestCallForceNoRetry(t *testing.T) {
   121  	t.Parallel()
   122  
   123  	retryCount := 0
   124  	mockCallFn := func(ctx context.Context, req *mockRequest, opts ...grpc.CallOption) (*mockResponse, error) {
   125  		if retryCount < 5 {
   126  			retryCount++
   127  		} else {
   128  			return &mockResponse{val: req.val}, nil
   129  		}
   130  		return nil, status.Error(codes.Unavailable, "should not retry")
   131  	}
   132  
   133  	call := NewCall(mockCallFn, &mockRequest{val: 1}, WithForceNoRetry())
   134  	_, err := call.Do(context.Background())
   135  	require.Error(t, err)
   136  }