cleanup sysinfo package

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

sysinfo/sysinfo_linux_test.go

@@ -0,0 +1,58 @@
+package sysinfo
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"testing"
+)
+
+func TestReadProcBool(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "test-sysinfo-proc")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	procFile := filepath.Join(tmpDir, "read-proc-bool")
+	if err := ioutil.WriteFile(procFile, []byte("1"), 644); err != nil {
+		t.Fatal(err)
+	}
+
+	if !readProcBool(procFile) {
+		t.Fatal("expected proc bool to be true, got false")
+	}
+
+	if err := ioutil.WriteFile(procFile, []byte("0"), 644); err != nil {
+		t.Fatal(err)
+	}
+	if readProcBool(procFile) {
+		t.Fatal("expected proc bool to be false, got false")
+	}
+
+	if readProcBool(path.Join(tmpDir, "no-exist")) {
+		t.Fatal("should be false for non-existent entry")
+	}
+
+}
+
+func TestCgroupEnabled(t *testing.T) {
+	cgroupDir, err := ioutil.TempDir("", "cgroup-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(cgroupDir)
+
+	if cgroupEnabled(cgroupDir, "test") {
+		t.Fatal("cgroupEnabled should be false")
+	}
+
+	if err := ioutil.WriteFile(path.Join(cgroupDir, "test"), []byte{}, 644); err != nil {
+		t.Fatal(err)
+	}
+
+	if !cgroupEnabled(cgroupDir, "test") {
+		t.Fatal("cgroupEnabled should be true")
+	}
+}