github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/pkg/context/context_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 context
    15  
    16  import (
    17  	"context"
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/pingcap/check"
    22  	"github.com/pingcap/errors"
    23  	"github.com/pingcap/ticdc/cdc/model"
    24  	"github.com/pingcap/ticdc/pkg/config"
    25  	"github.com/pingcap/ticdc/pkg/util/testleak"
    26  )
    27  
    28  func TestSuite(t *testing.T) { check.TestingT(t) }
    29  
    30  type contextSuite struct{}
    31  
    32  var _ = check.Suite(&contextSuite{})
    33  
    34  func (s *contextSuite) TestVars(c *check.C) {
    35  	defer testleak.AfterTest(c)()
    36  	stdCtx := context.Background()
    37  	conf := config.GetDefaultReplicaConfig()
    38  	conf.Filter.Rules = []string{"hello.world"}
    39  	info := &model.ChangeFeedInfo{Config: conf}
    40  	ctx := NewContext(stdCtx, &GlobalVars{
    41  		CaptureInfo: &model.CaptureInfo{ID: "capture1"},
    42  	})
    43  	ctx = WithChangefeedVars(ctx, &ChangefeedVars{
    44  		Info: info,
    45  	})
    46  	c.Assert(ctx.ChangefeedVars().Info, check.DeepEquals, info)
    47  	c.Assert(ctx.GlobalVars().CaptureInfo.ID, check.Equals, "capture1")
    48  }
    49  
    50  func (s *contextSuite) TestStdCancel(c *check.C) {
    51  	defer testleak.AfterTest(c)()
    52  	stdCtx := context.Background()
    53  	stdCtx, cancel := context.WithCancel(stdCtx)
    54  	ctx := NewContext(stdCtx, &GlobalVars{})
    55  	cancel()
    56  	<-ctx.Done()
    57  }
    58  
    59  func (s *contextSuite) TestCancel(c *check.C) {
    60  	defer testleak.AfterTest(c)()
    61  	stdCtx := context.Background()
    62  	ctx := NewContext(stdCtx, &GlobalVars{})
    63  	ctx, cancel := WithCancel(ctx)
    64  	cancel()
    65  	<-ctx.Done()
    66  }
    67  
    68  func (s *contextSuite) TestCancelCascade(c *check.C) {
    69  	defer testleak.AfterTest(c)()
    70  	startTime := time.Now()
    71  	stdCtx, cancel := context.WithDeadline(context.Background(), time.Now().Add(1*time.Second))
    72  	ctx := NewContext(stdCtx, &GlobalVars{})
    73  	ctx1, _ := WithCancel(ctx)
    74  	ctx2, cancel2 := WithCancel(ctx)
    75  	cancel2()
    76  	<-ctx2.Done()
    77  	c.Assert(time.Since(startTime), check.Less, time.Second)
    78  	<-ctx1.Done()
    79  	c.Assert(time.Since(startTime), check.GreaterEqual, time.Second)
    80  	cancel()
    81  }
    82  
    83  func (s *contextSuite) TestThrow(c *check.C) {
    84  	defer testleak.AfterTest(c)()
    85  	stdCtx := context.Background()
    86  	ctx := NewContext(stdCtx, &GlobalVars{})
    87  	ctx, cancel := WithCancel(ctx)
    88  	ctx = WithErrorHandler(ctx, func(err error) error {
    89  		c.Assert(err.Error(), check.Equals, "mock error")
    90  		cancel()
    91  		return nil
    92  	})
    93  	ctx.Throw(nil)
    94  	ctx.Throw(errors.New("mock error"))
    95  	<-ctx.Done()
    96  }
    97  
    98  func (s *contextSuite) TestThrowCascade(c *check.C) {
    99  	defer testleak.AfterTest(c)()
   100  	stdCtx := context.Background()
   101  	ctx := NewContext(stdCtx, &GlobalVars{})
   102  	ctx, cancel := WithCancel(ctx)
   103  	var errNum1, errNum2, errNum3 int
   104  	ctx = WithErrorHandler(ctx, func(err error) error {
   105  		if err.Error() == "mock error" {
   106  			errNum1++
   107  		} else if err.Error() == "mock error2" {
   108  			errNum2++
   109  		} else {
   110  			c.Fail()
   111  		}
   112  		return nil
   113  	})
   114  	ctx2 := WithErrorHandler(ctx, func(err error) error {
   115  		if err.Error() == "mock error2" {
   116  			errNum2++
   117  			return err
   118  		} else if err.Error() == "mock error3" {
   119  			errNum3++
   120  		} else {
   121  			c.Fail()
   122  		}
   123  		return nil
   124  	})
   125  	ctx2.Throw(errors.New("mock error2"))
   126  	ctx2.Throw(errors.New("mock error3"))
   127  	ctx.Throw(errors.New("mock error"))
   128  	c.Assert(errNum1, check.Equals, 1)
   129  	c.Assert(errNum2, check.Equals, 2)
   130  	c.Assert(errNum3, check.Equals, 1)
   131  	cancel()
   132  	<-ctx.Done()
   133  }
   134  
   135  func (s *contextSuite) TestThrowPanic(c *check.C) {
   136  	defer testleak.AfterTest(c)()
   137  	defer func() {
   138  		panicMsg := recover()
   139  		c.Assert(panicMsg, check.Equals, "an error has escaped, please report a bug{error 26 0  mock error}")
   140  	}()
   141  	stdCtx := context.Background()
   142  	ctx := NewContext(stdCtx, &GlobalVars{})
   143  	ctx.Throw(nil)
   144  	ctx.Throw(errors.New("mock error"))
   145  }