Test: add test for health/check

Signed-off-by: Hu Keping <hukeping@huawei.com>

health/checks/checks_test.go

@@ -0,0 +1,15 @@
+package checks
+
+import (
+	"testing"
+)
+
+func TestFileChecker(t *testing.T) {
+	if err := FileChecker("/tmp").Check(); err == nil {
+		t.Errorf("/tmp was expected as exists")
+	}
+
+	if err := FileChecker("NoSuchFileFromMoon").Check(); err != nil {
+		t.Errorf("NoSuchFileFromMoon was expected as not exists, error:%v", err)
+	}
+}