k8s.io/apiserver@v0.31.1/pkg/quota/v1/generic/evaluator_test.go (about)

     1  /*
     2  Copyright 2019 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 generic
    18  
    19  import (
    20  	"errors"
    21  	"testing"
    22  
    23  	"k8s.io/apimachinery/pkg/labels"
    24  	"k8s.io/apimachinery/pkg/runtime"
    25  	"k8s.io/client-go/tools/cache"
    26  )
    27  
    28  func TestCachedHasSynced(t *testing.T) {
    29  
    30  	called := 0
    31  	result := false
    32  	cachedFunc := cachedHasSynced(func() bool {
    33  		called++
    34  		return result
    35  	})
    36  
    37  	if cachedFunc() {
    38  		t.Fatal("expected false")
    39  	}
    40  	if called != 1 {
    41  		t.Fatalf("expected called=1, got %d", called)
    42  	}
    43  
    44  	if cachedFunc() {
    45  		t.Fatal("expected false")
    46  	}
    47  	if called != 2 {
    48  		t.Fatalf("expected called=2, got %d", called)
    49  	}
    50  
    51  	result = true
    52  	if !cachedFunc() {
    53  		t.Fatal("expected true")
    54  	}
    55  	if called != 3 {
    56  		t.Fatalf("expected called=3, got %d", called)
    57  	}
    58  
    59  	if !cachedFunc() {
    60  		t.Fatal("expected true")
    61  	}
    62  	if called != 3 {
    63  		// no more calls once we return true
    64  		t.Fatalf("expected called=3, got %d", called)
    65  	}
    66  }
    67  
    68  func TestProtectedLister(t *testing.T) {
    69  
    70  	hasSynced := false
    71  	notReadyErr := errors.New("not ready")
    72  	fake := &fakeLister{}
    73  	l := &protectedLister{
    74  		hasSynced:   func() bool { return hasSynced },
    75  		notReadyErr: notReadyErr,
    76  		delegate:    fake,
    77  	}
    78  	if _, err := l.List(nil); err != notReadyErr {
    79  		t.Fatalf("expected %v, got %v", notReadyErr, err)
    80  	}
    81  	if _, err := l.Get(""); err != notReadyErr {
    82  		t.Fatalf("expected %v, got %v", notReadyErr, err)
    83  	}
    84  	if fake.called != 0 {
    85  		t.Fatalf("expected called=0, got %d", fake.called)
    86  	}
    87  	fake.called = 0
    88  
    89  	hasSynced = true
    90  
    91  	if _, err := l.List(nil); err != errFakeLister {
    92  		t.Fatalf("expected %v, got %v", errFakeLister, err)
    93  	}
    94  	if _, err := l.Get(""); err != errFakeLister {
    95  		t.Fatalf("expected %v, got %v", errFakeLister, err)
    96  	}
    97  	if fake.called != 2 {
    98  		t.Fatalf("expected called=2, got %d", fake.called)
    99  	}
   100  	fake.called = 0
   101  
   102  	hasSynced = false
   103  
   104  	if _, err := l.List(nil); err != notReadyErr {
   105  		t.Fatalf("expected %v, got %v", notReadyErr, err)
   106  	}
   107  	if _, err := l.Get(""); err != notReadyErr {
   108  		t.Fatalf("expected %v, got %v", notReadyErr, err)
   109  	}
   110  	if fake.called != 0 {
   111  		t.Fatalf("expected called=2, got %d", fake.called)
   112  	}
   113  }
   114  
   115  var errFakeLister = errors.New("errFakeLister")
   116  
   117  type fakeLister struct {
   118  	called int
   119  }
   120  
   121  func (f *fakeLister) List(selector labels.Selector) (ret []runtime.Object, err error) {
   122  	f.called++
   123  	return nil, errFakeLister
   124  }
   125  func (f *fakeLister) Get(name string) (runtime.Object, error) {
   126  	f.called++
   127  	return nil, errFakeLister
   128  }
   129  func (f *fakeLister) ByNamespace(namespace string) cache.GenericNamespaceLister {
   130  	panic("not implemented")
   131  }