Fix building pkg/util/procfs on non-linux platforms

pkg/util/procfs/procfs_linux_test.go

@@ -0,0 +1,97 @@
+// +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 procfs
+
+import (
+	"io/ioutil"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"runtime"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func verifyContainerName(procCgroupText, expectedName string, expectedErr bool, t *testing.T) {
+	name, err := containerNameFromProcCgroup(procCgroupText)
+	if expectedErr && err == nil {
+		t.Errorf("Expected error but did not get error in verifyContainerName")
+		return
+	} else if !expectedErr && err != nil {
+		t.Errorf("Expected no error, but got error %+v in verifyContainerName", err)
+		return
+	} else if expectedErr {
+		return
+	}
+	if name != expectedName {
+		t.Errorf("Expected container name %s but got name %s", expectedName, name)
+	}
+}
+
+func TestContainerNameFromProcCgroup(t *testing.T) {
+	procCgroupValid := "2:devices:docker/kubelet"
+	verifyContainerName(procCgroupValid, "docker/kubelet", false, t)
+
+	procCgroupEmpty := ""
+	verifyContainerName(procCgroupEmpty, "", true, t)
+
+	content, err := ioutil.ReadFile("example_proc_cgroup")
+	if err != nil {
+		t.Errorf("Could not read example /proc cgroup file")
+	}
+	verifyContainerName(string(content), "/user/1000.user/c1.session", false, t)
+
+	procCgroupNoDevice := "2:freezer:docker/kubelet\n5:cpuacct:pkg/kubectl"
+	verifyContainerName(procCgroupNoDevice, "", true, t)
+
+	procCgroupInvalid := "devices:docker/kubelet\ncpuacct:pkg/kubectl"
+	verifyContainerName(procCgroupInvalid, "", true, t)
+}
+
+func TestPidOf(t *testing.T) {
+	if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
+		t.Skipf("not supported on GOOS=%s", runtime.GOOS)
+	}
+	pids, err := PidOf(filepath.Base(os.Args[0]))
+	assert.Empty(t, err)
+	assert.NotZero(t, pids)
+	assert.Contains(t, pids, os.Getpid())
+}
+
+func TestPKill(t *testing.T) {
+	if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
+		t.Skipf("not supported on GOOS=%s", runtime.GOOS)
+	}
+	sig := syscall.SIGCONT
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, sig)
+	defer signal.Stop(c)
+	PKill(os.Args[0], sig)
+	select {
+	case s := <-c:
+		if s != sig {
+			t.Fatalf("signal was %v, want %v", s, sig)
+		}
+	case <-time.After(1 * time.Second):
+		t.Fatalf("timeout waiting for %v", sig)
+	}
+}