134 lines
3.4 KiB
Go
134 lines
3.4 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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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 factory
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import (
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"k8s.io/autoscaler/cluster-autoscaler/expander"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
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)
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type substringTestFilterStrategy struct {
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substring string
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}
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func newSubstringTestFilterStrategy(substring string) *substringTestFilterStrategy {
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return &substringTestFilterStrategy{
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substring: substring,
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}
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}
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func (s *substringTestFilterStrategy) BestOptions(expansionOptions []expander.Option, nodeInfo map[string]*schedulerframework.NodeInfo) []expander.Option {
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var ret []expander.Option
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for _, option := range expansionOptions {
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if strings.Contains(option.Debug, s.substring) {
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ret = append(ret, option)
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}
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}
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return ret
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}
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func (s *substringTestFilterStrategy) BestOption(expansionOptions []expander.Option, nodeInfo map[string]*schedulerframework.NodeInfo) *expander.Option {
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ret := s.BestOptions(expansionOptions, nodeInfo)
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if len(ret) == 0 {
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return nil
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}
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return &ret[0]
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}
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func TestChainStrategy_BestOption(t *testing.T) {
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for name, tc := range map[string]struct {
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filters []expander.Filter
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fallback expander.Strategy
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options []expander.Option
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expected *expander.Option
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}{
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"selects with no filters": {
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filters: []expander.Filter{},
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fallback: newSubstringTestFilterStrategy("a"),
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options: []expander.Option{
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*newOption("b"),
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*newOption("a"),
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},
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expected: newOption("a"),
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},
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"filters with one filter": {
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filters: []expander.Filter{
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newSubstringTestFilterStrategy("a"),
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},
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fallback: newSubstringTestFilterStrategy("b"),
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options: []expander.Option{
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*newOption("ab"),
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*newOption("b"),
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},
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expected: newOption("ab"),
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},
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"filters with multiple filters": {
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filters: []expander.Filter{
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newSubstringTestFilterStrategy("a"),
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newSubstringTestFilterStrategy("b"),
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},
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fallback: newSubstringTestFilterStrategy("x"),
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options: []expander.Option{
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*newOption("xab"),
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*newOption("xa"),
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*newOption("x"),
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},
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expected: newOption("xab"),
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},
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"selects from multiple after filters": {
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filters: []expander.Filter{
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newSubstringTestFilterStrategy("x"),
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},
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fallback: newSubstringTestFilterStrategy("a"),
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options: []expander.Option{
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*newOption("xc"),
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*newOption("xaa"),
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*newOption("xab"),
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},
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expected: newOption("xaa"),
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},
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"short circuits": {
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filters: []expander.Filter{
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newSubstringTestFilterStrategy("a"),
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newSubstringTestFilterStrategy("b"),
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},
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fallback: newSubstringTestFilterStrategy("x"),
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options: []expander.Option{
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*newOption("a"),
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},
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expected: newOption("a"),
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},
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} {
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t.Run(name, func(t *testing.T) {
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subject := newChainStrategy(tc.filters, tc.fallback)
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actual := subject.BestOption(tc.options, nil)
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assert.Equal(t, tc.expected, actual)
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})
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}
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}
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func newOption(debug string) *expander.Option {
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return &expander.Option{
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Debug: debug,
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}
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}
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