clean testdata after running unit tests

Author: AbelHu

admission-webhook/main_test.go

@@ -90,5 +90,6 @@ func Test_env_int(t *testing.T) {
 func TestMain(m *testing.M) {
 	GenerateTestCertAndKey()
 	code := m.Run() // run tests
+	ClearTestdata()
 	os.Exit(code)
 }

admission-webhook/utils_test.go

@@ -148,3 +148,7 @@ func GenerateTestCertAndKey() {
 	pem.Encode(keyFile, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: keyBytes})
 	keyFile.Close()
 }
+
+func ClearTestdata() {
+	os.RemoveAll("testdata")
+}