func TestHTTPClusterClientDoDeadlineExceedContext(t *testing.T) { fakeURL := url.URL{} tr := newFakeTransport() tr.finishCancel <- struct{}{} c := &httpClusterClient{ clientFactory: newHTTPClientFactory(tr, DefaultCheckRedirect, 0), endpoints: []url.URL{fakeURL}, } errc := make(chan error) go func() { ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond) defer cancel() _, _, err := c.Do(ctx, &fakeAction{}) errc <- err }() select { case err := <-errc: if err != context.DeadlineExceeded { t.Errorf("err = %+v, want %+v", err, context.DeadlineExceeded) } case <-time.After(time.Second): t.Fatalf("unexpected timeout when waitting for request to deadline exceed") } }
func ExampleWithTimeout() { // Pass a context with a timeout to tell a blocking function that it // should abandon its work after the timeout elapses. ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond) select { case <-time.After(200 * time.Millisecond): fmt.Println("overslept") case <-ctx.Done(): fmt.Println(ctx.Err()) // prints "context deadline exceeded" } // Output: // context deadline exceeded }