test: improve test coverage for pkg/rm/tcc/fence/config (50%)

Author: WangzJi

pkg/rm/tcc/fence/config/tcc_fence_config_test.go

@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 config
+
+import (
+	"testing"
+
+	"seata.apache.org/seata-go/pkg/util/log"
+)
+
+func TestInitFence(t *testing.T) {
+	log.Init()
+
+	// InitFence is currently empty, just call it to ensure no panic
+	InitFence()
+}
+
+func TestInitCleanTask(t *testing.T) {
+	log.Init()
+
+	// Test with an invalid DSN - should log warning but not panic
+	dsn := "invalid-dsn"
+
+	// Call InitCleanTask which starts a goroutine
+	// Even with invalid DSN, it should handle the error gracefully
+	InitCleanTask(dsn)
+
+	// Note: We don't call Destroy() here because there's a known issue
+	// where Destroy() panics if the logQueue was not initialized
+	// (which happens when the DSN is invalid and sql.Open fails).
+	// This is a limitation of the current handler implementation.
+}