github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/util/ctxgroup/ctxgroup_test.go (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package ctxgroup
    12  
    13  import (
    14  	"context"
    15  	"testing"
    16  
    17  	"github.com/cockroachdb/cockroach/pkg/testutils"
    18  	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
    19  	"github.com/cockroachdb/errors"
    20  )
    21  
    22  func TestErrorAfterCancel(t *testing.T) {
    23  	defer leaktest.AfterTest(t)()
    24  
    25  	testutils.RunTrueAndFalse(t, "canceled", func(t *testing.T, canceled bool) {
    26  		ctx, cancel := context.WithCancel(context.Background())
    27  		defer cancel()
    28  
    29  		g := WithContext(ctx)
    30  		g.Go(func() error {
    31  			return nil
    32  		})
    33  		expErr := context.Canceled
    34  		if !canceled {
    35  			expErr = nil
    36  		} else {
    37  			cancel()
    38  		}
    39  
    40  		if err := g.Wait(); !errors.Is(err, expErr) {
    41  			t.Errorf("expected %v, got %v", expErr, err)
    42  		}
    43  	})
    44  }