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92 lines
2 KiB
Go
92 lines
2 KiB
Go
/*
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Copyright 2020 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 parallelize
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import (
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"fmt"
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"sync"
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"testing"
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"k8s.io/component-base/metrics/testutil"
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"k8s.io/klog/v2/ktesting"
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"k8s.io/kubernetes/pkg/scheduler/metrics"
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)
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func TestChunkSize(t *testing.T) {
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tests := []struct {
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input int
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wantOutput int
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}{
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{
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input: 32,
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wantOutput: 3,
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},
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{
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input: 16,
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wantOutput: 2,
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},
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{
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input: 1,
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wantOutput: 1,
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},
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{
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input: 0,
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wantOutput: 1,
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},
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}
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for _, test := range tests {
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t.Run(fmt.Sprintf("%d", test.input), func(t *testing.T) {
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if chunkSizeFor(test.input, DefaultParallelism) != test.wantOutput {
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t.Errorf("Expected: %d, got: %d", test.wantOutput, chunkSizeFor(test.input, DefaultParallelism))
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}
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})
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}
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}
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func TestGoroutinesMetric(t *testing.T) {
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metrics.Register()
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metrics.Goroutines.Reset()
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const (
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operation = "test-operation"
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pieces = 32
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)
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var (
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mu sync.Mutex
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peakValue float64
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)
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_, ctx := ktesting.NewTestContext(t)
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p := NewParallelizer(DefaultParallelism)
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p.Until(ctx, pieces, func(_ int) {
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val, err := testutil.GetGaugeMetricValue(metrics.Goroutines.WithLabelValues(operation))
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if err != nil {
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t.Fatalf("failed to read goroutines metric inside Until: %v", err)
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}
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mu.Lock()
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if val > peakValue {
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peakValue = val
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}
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mu.Unlock()
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}, operation)
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if peakValue <= 0 {
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t.Errorf("expected goroutines metric to be >0 during Until, peak was %v", peakValue)
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}
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}
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