Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/volume/metrics_du_test.go

@@ -0,0 +1,103 @@
+// +build linux
+
+/*
+Copyright 2015 The Kubernetes Authors.
+
+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 volume_test
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	utiltesting "k8s.io/kubernetes/pkg/util/testing"
+	. "k8s.io/kubernetes/pkg/volume"
+	volumetest "k8s.io/kubernetes/pkg/volume/testing"
+)
+
+const expectedBlockSize = 4096
+
+// TestMetricsDuGetCapacity tests that MetricsDu can read disk usage
+// for path
+func TestMetricsDuGetCapacity(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("metrics_du_test")
+	if err != nil {
+		t.Fatalf("Can't make a tmp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+	metrics := NewMetricsDu(tmpDir)
+
+	expectedEmptyDirUsage, err := volumetest.FindEmptyDirectoryUsageOnTmpfs()
+	if err != nil {
+		t.Errorf("Unexpected error finding expected empty directory usage on tmpfs: %v", err)
+	}
+
+	actual, err := metrics.GetMetrics()
+	if err != nil {
+		t.Errorf("Unexpected error when calling GetMetrics %v", err)
+	}
+	if e, a := expectedEmptyDirUsage.Value(), actual.Used.Value(); e != a {
+		t.Errorf("Unexpected value for empty directory; expected %v, got %v", e, a)
+	}
+
+	// TODO(pwittroc): Figure out a way to test these values for correctness, maybe by formatting and mounting a file
+	// as a filesystem
+	if a := actual.Capacity.Value(); a <= 0 {
+		t.Errorf("Expected Capacity %d to be greater than 0.", a)
+	}
+	if a := actual.Available.Value(); a <= 0 {
+		t.Errorf("Expected Available %d to be greater than 0.", a)
+	}
+
+	// Write a file and expect Used to increase
+	ioutil.WriteFile(filepath.Join(tmpDir, "f1"), []byte("Hello World"), os.ModeTemporary)
+	actual, err = metrics.GetMetrics()
+	if err != nil {
+		t.Errorf("Unexpected error when calling GetMetrics %v", err)
+	}
+	if e, a := (expectedEmptyDirUsage.Value() + expectedBlockSize), actual.Used.Value(); e != a {
+		t.Errorf("Unexpected Used for directory with file.  Expected %v, got %d.", e, a)
+	}
+}
+
+// TestMetricsDuRequireInit tests that if MetricsDu is not initialized with a path, GetMetrics
+// returns an error
+func TestMetricsDuRequirePath(t *testing.T) {
+	metrics := NewMetricsDu("")
+	actual, err := metrics.GetMetrics()
+	expected := &Metrics{}
+	if *actual != *expected {
+		t.Errorf("Expected empty Metrics from uninitialized MetricsDu, actual %v", *actual)
+	}
+	if err == nil {
+		t.Errorf("Expected error when calling GetMetrics on uninitialized MetricsDu, actual nil")
+	}
+}
+
+// TestMetricsDuRealDirectory tests that if MetricsDu is initialized to a non-existent path, GetMetrics
+// returns an error
+func TestMetricsDuRequireRealDirectory(t *testing.T) {
+	metrics := NewMetricsDu("/not/a/real/directory")
+	actual, err := metrics.GetMetrics()
+	expected := &Metrics{}
+	if *actual != *expected {
+		t.Errorf("Expected empty Metrics from incorrectly initialized MetricsDu, actual %v", *actual)
+	}
+	if err == nil {
+		t.Errorf("Expected error when calling GetMetrics on incorrectly initialized MetricsDu, actual nil")
+	}
+}