github.com/spotmaxtech/k8s-apimachinery-v0260@v0.0.1/pkg/watch/streamwatcher_test.go (about)

     1  /*
     2  Copyright 2014 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package watch_test
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"reflect"
    23  	"testing"
    24  	"time"
    25  
    26  	"github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/runtime"
    27  	. "github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/watch"
    28  )
    29  
    30  type fakeDecoder struct {
    31  	items chan Event
    32  	err   error
    33  }
    34  
    35  func (f fakeDecoder) Decode() (action EventType, object runtime.Object, err error) {
    36  	if f.err != nil {
    37  		return "", nil, f.err
    38  	}
    39  	item, open := <-f.items
    40  	if !open {
    41  		return action, nil, io.EOF
    42  	}
    43  	return item.Type, item.Object, nil
    44  }
    45  
    46  func (f fakeDecoder) Close() {
    47  	if f.items != nil {
    48  		close(f.items)
    49  	}
    50  }
    51  
    52  type fakeReporter struct {
    53  	err error
    54  }
    55  
    56  func (f *fakeReporter) AsObject(err error) runtime.Object {
    57  	f.err = err
    58  	return runtime.Unstructured(nil)
    59  }
    60  
    61  func TestStreamWatcher(t *testing.T) {
    62  	table := []Event{
    63  		{Type: Added, Object: testType("foo")},
    64  	}
    65  
    66  	fd := fakeDecoder{items: make(chan Event, 5)}
    67  	sw := NewStreamWatcher(fd, nil)
    68  
    69  	for _, item := range table {
    70  		fd.items <- item
    71  		got, open := <-sw.ResultChan()
    72  		if !open {
    73  			t.Errorf("unexpected early close")
    74  		}
    75  		if e, a := item, got; !reflect.DeepEqual(e, a) {
    76  			t.Errorf("expected %v, got %v", e, a)
    77  		}
    78  	}
    79  
    80  	sw.Stop()
    81  	_, open := <-sw.ResultChan()
    82  	if open {
    83  		t.Errorf("Unexpected failure to close")
    84  	}
    85  }
    86  
    87  func TestStreamWatcherError(t *testing.T) {
    88  	fd := fakeDecoder{err: fmt.Errorf("test error")}
    89  	fr := &fakeReporter{}
    90  	sw := NewStreamWatcher(fd, fr)
    91  	evt, ok := <-sw.ResultChan()
    92  	if !ok {
    93  		t.Fatalf("unexpected close")
    94  	}
    95  	if evt.Type != Error || evt.Object != runtime.Unstructured(nil) {
    96  		t.Fatalf("unexpected object: %#v", evt)
    97  	}
    98  	_, ok = <-sw.ResultChan()
    99  	if ok {
   100  		t.Fatalf("unexpected open channel")
   101  	}
   102  
   103  	sw.Stop()
   104  	_, ok = <-sw.ResultChan()
   105  	if ok {
   106  		t.Fatalf("unexpected open channel")
   107  	}
   108  }
   109  
   110  func TestStreamWatcherRace(t *testing.T) {
   111  	fd := fakeDecoder{err: fmt.Errorf("test error")}
   112  	fr := &fakeReporter{}
   113  	sw := NewStreamWatcher(fd, fr)
   114  	time.Sleep(10 * time.Millisecond)
   115  	sw.Stop()
   116  	time.Sleep(10 * time.Millisecond)
   117  	_, ok := <-sw.ResultChan()
   118  	if ok {
   119  		t.Fatalf("unexpected pending send")
   120  	}
   121  }