c67ce887f2
- Add volume.MetricsProvider function to Volume interface. - Add volume.MetricsDu for providing metrics via executing "du". - Add volulme.MetricsNil for unsupported Volumes.
91 lines
2.9 KiB
Go
91 lines
2.9 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors 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 volume
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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)
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// TestMetricsDuGetCapacity tests that MetricsDu can read disk usage
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// for path
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func TestMetricsDuGetCapacity(t *testing.T) {
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tmpDir, err := ioutil.TempDir(os.TempDir(), "metrics_du_test")
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if err != nil {
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t.Fatalf("Can't make a tmp dir: %v", err)
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}
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defer os.RemoveAll(tmpDir)
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metrics := NewMetricsDu(tmpDir)
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actual, err := metrics.GetMetrics()
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if err != nil {
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t.Errorf("Unexpected error when calling GetMetrics %v", err)
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}
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if actual.Used.Value() != 4096 {
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t.Errorf("Expected Used %d for empty directory to be 4096.", actual.Used.Value())
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}
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// TODO(pwittroc): Figure out a way to test these values for correctness, maybe by formatting and mounting a file
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// as a filesystem
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if actual.Capacity.Value() <= 0 {
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t.Errorf("Expected Capacity %d to be greater than 0.", actual.Capacity.Value())
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}
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if actual.Available.Value() <= 0 {
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t.Errorf("Expected Available %d to be greater than 0.", actual.Available.Value())
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}
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// Write a file and expect Used to increase
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ioutil.WriteFile(filepath.Join(tmpDir, "f1"), []byte("Hello World"), os.ModeTemporary)
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actual, err = metrics.GetMetrics()
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if err != nil {
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t.Errorf("Unexpected error when calling GetMetrics %v", err)
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}
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if actual.Used.Value() != 8192 {
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t.Errorf("Unexpected Used for directory with file. Expected 8192, was %d.", actual.Used.Value())
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}
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}
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// TestMetricsDuRequireInit tests that if MetricsDu is not initialized with a path, GetMetrics
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// returns an error
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func TestMetricsDuRequirePath(t *testing.T) {
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metrics := &metricsDu{}
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actual, err := metrics.GetMetrics()
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expected := &Metrics{}
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if *actual != *expected {
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t.Errorf("Expected empty Metrics from uninitialized MetricsDu, actual %v", *actual)
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}
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if err == nil {
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t.Errorf("Expected error when calling GetMetrics on uninitialized MetricsDu, actual nil")
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}
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}
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// TestMetricsDuRealDirectory tests that if MetricsDu is initialized to a non-existent path, GetMetrics
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// returns an error
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func TestMetricsDuRequireRealDirectory(t *testing.T) {
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metrics := NewMetricsDu("/not/a/real/directory")
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actual, err := metrics.GetMetrics()
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expected := &Metrics{}
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if *actual != *expected {
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t.Errorf("Expected empty Metrics from incorrectly initialized MetricsDu, actual %v", *actual)
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}
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if err == nil {
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t.Errorf("Expected error when calling GetMetrics on incorrectly initialized MetricsDu, actual nil")
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}
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}
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