store_test.go

Documentation: k8s.io/client-go/tools/cache

     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 cache
    18  
    19  import (
    20  	"errors"
    21  	"testing"
    22  
    23  	"k8s.io/apimachinery/pkg/util/sets"
    24  )
    25  
    26  // Test public interface
    27  func doTestStore(t *testing.T, store Store) {
    28  	mkObj := func(id string, val string) testStoreObject {
    29  		return testStoreObject{id: id, val: val}
    30  	}
    31  
    32  	store.Add(mkObj("foo", "bar"))
    33  	if item, ok, _ := store.Get(mkObj("foo", "")); !ok {
    34  		t.Errorf("didn't find inserted item")
    35  	} else {
    36  		if e, a := "bar", item.(testStoreObject).val; e != a {
    37  			t.Errorf("expected %v, got %v", e, a)
    38  		}
    39  	}
    40  	store.Update(mkObj("foo", "baz"))
    41  	if item, ok, _ := store.Get(mkObj("foo", "")); !ok {
    42  		t.Errorf("didn't find inserted item")
    43  	} else {
    44  		if e, a := "baz", item.(testStoreObject).val; e != a {
    45  			t.Errorf("expected %v, got %v", e, a)
    46  		}
    47  	}
    48  	store.Delete(mkObj("foo", ""))
    49  	if _, ok, _ := store.Get(mkObj("foo", "")); ok {
    50  		t.Errorf("found deleted item??")
    51  	}
    52  
    53  	// Test List.
    54  	store.Add(mkObj("a", "b"))
    55  	store.Add(mkObj("c", "d"))
    56  	store.Add(mkObj("e", "e"))
    57  	{
    58  		found := sets.String{}
    59  		for _, item := range store.List() {
    60  			found.Insert(item.(testStoreObject).val)
    61  		}
    62  		if !found.HasAll("b", "d", "e") {
    63  			t.Errorf("missing items, found: %v", found)
    64  		}
    65  		if len(found) != 3 {
    66  			t.Errorf("extra items")
    67  		}
    68  	}
    69  
    70  	// Test Replace.
    71  	store.Replace([]interface{}{
    72  		mkObj("foo", "foo"),
    73  		mkObj("bar", "bar"),
    74  	}, "0")
    75  
    76  	{
    77  		found := sets.String{}
    78  		for _, item := range store.List() {
    79  			found.Insert(item.(testStoreObject).val)
    80  		}
    81  		if !found.HasAll("foo", "bar") {
    82  			t.Errorf("missing items")
    83  		}
    84  		if len(found) != 2 {
    85  			t.Errorf("extra items")
    86  		}
    87  	}
    88  }
    89  
    90  // Test public interface
    91  func doTestIndex(t *testing.T, indexer Indexer) {
    92  	mkObj := func(id string, val string) testStoreObject {
    93  		return testStoreObject{id: id, val: val}
    94  	}
    95  
    96  	// Test Index
    97  	expected := map[string]sets.String{}
    98  	expected["b"] = sets.NewString("a", "c")
    99  	expected["f"] = sets.NewString("e")
   100  	expected["h"] = sets.NewString("g")
   101  	indexer.Add(mkObj("a", "b"))
   102  	indexer.Add(mkObj("c", "b"))
   103  	indexer.Add(mkObj("e", "f"))
   104  	indexer.Add(mkObj("g", "h"))
   105  	{
   106  		for k, v := range expected {
   107  			found := sets.String{}
   108  			indexResults, err := indexer.Index("by_val", mkObj("", k))
   109  			if err != nil {
   110  				t.Errorf("Unexpected error %v", err)
   111  			}
   112  			for _, item := range indexResults {
   113  				found.Insert(item.(testStoreObject).id)
   114  			}
   115  			items := v.List()
   116  			if !found.HasAll(items...) {
   117  				t.Errorf("missing items, index %s, expected %v but found %v", k, items, found.List())
   118  			}
   119  		}
   120  	}
   121  }
   122  
   123  func testStoreKeyFunc(obj interface{}) (string, error) {
   124  	return obj.(testStoreObject).id, nil
   125  }
   126  
   127  func testStoreIndexFunc(obj interface{}) ([]string, error) {
   128  	return []string{obj.(testStoreObject).val}, nil
   129  }
   130  
   131  func testStoreIndexers() Indexers {
   132  	indexers := Indexers{}
   133  	indexers["by_val"] = testStoreIndexFunc
   134  	return indexers
   135  }
   136  
   137  type testStoreObject struct {
   138  	id  string
   139  	val string
   140  }
   141  
   142  func TestCache(t *testing.T) {
   143  	doTestStore(t, NewStore(testStoreKeyFunc))
   144  }
   145  
   146  func TestFIFOCache(t *testing.T) {
   147  	doTestStore(t, NewFIFO(testStoreKeyFunc))
   148  }
   149  
   150  func TestUndeltaStore(t *testing.T) {
   151  	nop := func([]interface{}) {}
   152  	doTestStore(t, NewUndeltaStore(nop, testStoreKeyFunc))
   153  }
   154  
   155  func TestIndex(t *testing.T) {
   156  	doTestIndex(t, NewIndexer(testStoreKeyFunc, testStoreIndexers()))
   157  }
   158  
   159  func TestKeyError(t *testing.T) {
   160  	obj := 100
   161  	err := errors.New("error")
   162  	keyErr := KeyError{obj, err}
   163  
   164  	if errors.Unwrap(keyErr) != err {
   165  		t.Errorf("expected unwrap error: %v", err)
   166  	}
   167  
   168  	nestedKeyErr := KeyError{obj, keyErr}
   169  	if !errors.Is(keyErr, err) || !errors.Is(nestedKeyErr, err) {
   170  		t.Errorf("not match target error: %v", err)
   171  	}
   172  }
   173
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