mirror of https://github.com/k3s-io/k3s
120 lines
2.7 KiB
Go
120 lines
2.7 KiB
Go
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/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cache
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import (
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"errors"
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"reflect"
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"testing"
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"time"
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)
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type testPair struct {
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id string
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obj interface{}
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}
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type testEnumerator []testPair
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func (t testEnumerator) Len() int { return len(t) }
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func (t testEnumerator) Get(i int) (string, interface{}) {
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return t[i].id, t[i].obj
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}
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func TestPoller_sync(t *testing.T) {
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table := []struct {
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// each step simulates the list that a getFunc would receive.
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steps [][]testPair
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}{
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{
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steps: [][]testPair{
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{
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{"foo", "foo1"},
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{"bar", "bar1"},
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{"baz", "baz1"},
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{"qux", "qux1"},
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}, {
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{"foo", "foo2"},
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{"bar", "bar2"},
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{"qux", "qux2"},
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}, {
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{"bar", "bar3"},
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{"baz", "baz2"},
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{"qux", "qux3"},
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}, {
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{"qux", "qux4"},
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}, {
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{"foo", "foo3"},
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},
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},
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},
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}
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for testCase, item := range table {
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s := NewStore()
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// This is a unit test for the sync function, hence the nil getFunc.
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p := NewPoller(nil, 0, s)
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for line, pairs := range item.steps {
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p.sync(testEnumerator(pairs))
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ids := s.Contains()
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for _, pair := range pairs {
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if !ids.Has(pair.id) {
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t.Errorf("%v, %v: expected to find entry for %v, but did not.", testCase, line, pair.id)
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continue
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}
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found, ok := s.Get(pair.id)
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if !ok {
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t.Errorf("%v, %v: unexpected absent entry for %v", testCase, line, pair.id)
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continue
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}
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if e, a := pair.obj, found; !reflect.DeepEqual(e, a) {
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t.Errorf("%v, %v: expected %v, got %v for %v", testCase, line, e, a, pair.id)
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}
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}
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if e, a := len(pairs), len(ids); e != a {
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t.Errorf("%v, %v: expected len %v, got %v", testCase, line, e, a)
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}
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}
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}
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}
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func TestPoller_Run(t *testing.T) {
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s := NewStore()
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const count = 10
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var called = 0
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done := make(chan struct{})
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NewPoller(func() (Enumerator, error) {
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called++
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if called == count {
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close(done)
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}
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// test both error and regular returns.
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if called&1 == 0 {
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return testEnumerator{}, nil
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}
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return nil, errors.New("transient error")
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}, time.Millisecond, s).Run()
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// The test here is that we get called at least count times.
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<-done
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// We never added anything, verify that.
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if e, a := 0, len(s.Contains()); e != a {
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t.Errorf("expected %v, got %v", e, a)
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}
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}
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