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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collector
import (
"testing"
"time"
"github.com/google/cadvisor/info/v1"
"github.com/stretchr/testify/assert"
)
type fakeCollector struct {
nextCollectionTime time.Time
err error
collectedFrom int
}
func (fc *fakeCollector) Collect(metric map[string][]v1.MetricVal) (time.Time, map[string][]v1.MetricVal, error) {
fc.collectedFrom++
return fc.nextCollectionTime, metric, fc.err
}
func (fc *fakeCollector) Name() string {
return "fake-collector"
}
func (fc *fakeCollector) GetSpec() []v1.MetricSpec {
return []v1.MetricSpec{}
}
func TestCollect(t *testing.T) {
cm := &GenericCollectorManager{}
firstTime := time.Now().Add(-time.Hour)
secondTime := time.Now().Add(time.Hour)
f1 := &fakeCollector{
nextCollectionTime: firstTime,
}
f2 := &fakeCollector{
nextCollectionTime: secondTime,
}
assert := assert.New(t)
assert.NoError(cm.RegisterCollector(f1))
assert.NoError(cm.RegisterCollector(f2))
// First collection, everyone gets collected from.
nextTime, _, err := cm.Collect()
assert.Equal(firstTime, nextTime)
assert.NoError(err)
assert.Equal(1, f1.collectedFrom)
assert.Equal(1, f2.collectedFrom)
f1.nextCollectionTime = time.Now().Add(2 * time.Hour)
// Second collection, only the one that is ready gets collected from.
nextTime, _, err = cm.Collect()
assert.Equal(secondTime, nextTime)
assert.NoError(err)
assert.Equal(2, f1.collectedFrom)
assert.Equal(1, f2.collectedFrom)
}
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