Copilot commented on code in PR #985:
URL: 
https://github.com/apache/incubator-seata-go/pull/985#discussion_r2504488139


##########
pkg/integration/integration_test.go:
##########
@@ -0,0 +1,205 @@
+/*
+ * 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 integration
+
+import (
+       "testing"
+
+       "dubbo.apache.org/dubbo-go/v3/common/extension"
+       "github.com/stretchr/testify/assert"
+
+       "seata.apache.org/seata-go/pkg/constant"
+       "seata.apache.org/seata-go/pkg/integration/dubbo"
+)
+
+// TestInit tests the Init function
+func TestInit(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init successfully initializes dubbo integration",
+               },
+               {
+                       name: "Init can be called multiple times without error",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init - should not panic
+                       assert.NotPanics(t, func() {
+                               Init()
+                       })
+
+                       // Verify that the filter was registered
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Verify that the filter is the correct type
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+               })
+       }

Review Comment:
   The test case structure contains two test cases with different names but 
identical test logic. Since both test cases execute the same assertions and the 
'name' field is the only differentiator, this creates unnecessary duplication. 
Consider consolidating into a single test case or adding distinct test logic if 
the second case is meant to verify idempotency (which is already covered by 
TestInit_FilterRegistration).



##########
pkg/integration/integration_test.go:
##########
@@ -0,0 +1,205 @@
+/*
+ * 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 integration
+
+import (
+       "testing"
+
+       "dubbo.apache.org/dubbo-go/v3/common/extension"
+       "github.com/stretchr/testify/assert"
+
+       "seata.apache.org/seata-go/pkg/constant"
+       "seata.apache.org/seata-go/pkg/integration/dubbo"
+)
+
+// TestInit tests the Init function
+func TestInit(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init successfully initializes dubbo integration",
+               },
+               {
+                       name: "Init can be called multiple times without error",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init - should not panic
+                       assert.NotPanics(t, func() {
+                               Init()
+                       })
+
+                       // Verify that the filter was registered
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Verify that the filter is the correct type
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+               })
+       }
+}
+
+// TestInit_FilterRegistration tests that Init registers the filter correctly
+func TestInit_FilterRegistration(t *testing.T) {
+       tests := []struct {
+               name          string
+               callInitTimes int
+       }{
+               {
+                       name:          "Single Init call",
+                       callInitTimes: 1,
+               },
+               {
+                       name:          "Multiple Init calls",
+                       callInitTimes: 3,
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init multiple times
+                       for i := 0; i < tt.callInitTimes; i++ {
+                               assert.NotPanics(t, func() {
+                                       Init()
+                               })
+                       }
+
+                       // Verify the filter is still registered correctly
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get the filter directly from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Verify both return the same filter instance
+                       dubboFilter2 := dubbo.GetDubboTransactionFilter()
+                       assert.Equal(t, dubboFilter, dubboFilter2, 
"GetDubboTransactionFilter should return same instance")
+               })
+       }
+}
+
+// TestInit_Integration tests the integration with dubbo package
+func TestInit_Integration(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Verify dubbo filter can be retrieved after Init",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Initialize
+                       Init()
+
+                       // Get filter from extension
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get filter from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Create another instance via the extension
+                       filterFunc, ok2 := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok2)
+                       assert.NotNil(t, filterFunc)
+
+                       // Both should be the same filter
+                       assert.Equal(t, filter, filterFunc)
+               })
+       }
+}
+
+// TestInit_NoSideEffects tests that Init has no unexpected side effects
+func TestInit_NoSideEffects(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init does not cause side effects",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Get state before Init
+                       filterBefore, okBefore := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Call Init
+                       Init()
+
+                       // Get state after Init
+                       filterAfter, okAfter := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Filter should be registered
+                       assert.True(t, okAfter)
+                       assert.NotNil(t, filterAfter)
+
+                       // Calling Init again should not change the filter
+                       Init()
+                       filterAfterSecond, okAfterSecond := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, okAfterSecond)
+                       assert.NotNil(t, filterAfterSecond)
+
+                       // The filter should be the same
+                       if okBefore && filterBefore != nil {
+                               assert.Equal(t, filterBefore, filterAfter)
+                       }
+               })

Review Comment:
   This test contains only a single test case in the table-driven structure 
without any variation. The table-driven test pattern is unnecessary here. 
Consider converting this to a simple test function without the table structure, 
or add meaningful variations to justify the pattern.
   ```suggestion
        // Initialize
        Init()
   
        // Get filter from extension
        filter, ok := extension.GetFilter(constant.SeataFilterKey)
        assert.True(t, ok)
        assert.NotNil(t, filter)
   
        // Get filter from dubbo package
        dubboFilter := dubbo.GetDubboTransactionFilter()
        assert.NotNil(t, dubboFilter)
   
        // Create another instance via the extension
        filterFunc, ok2 := extension.GetFilter(constant.SeataFilterKey)
        assert.True(t, ok2)
        assert.NotNil(t, filterFunc)
   
        // Both should be the same filter
        assert.Equal(t, filter, filterFunc)
   }
   
   // TestInit_NoSideEffects tests that Init has no unexpected side effects
   func TestInit_NoSideEffects(t *testing.T) {
        // Get state before Init
        filterBefore, okBefore := extension.GetFilter(constant.SeataFilterKey)
   
        // Call Init
        Init()
   
        // Get state after Init
        filterAfter, okAfter := extension.GetFilter(constant.SeataFilterKey)
   
        // Filter should be registered
        assert.True(t, okAfter)
        assert.NotNil(t, filterAfter)
   
        // Calling Init again should not change the filter
        Init()
        filterAfterSecond, okAfterSecond := 
extension.GetFilter(constant.SeataFilterKey)
        assert.True(t, okAfterSecond)
        assert.NotNil(t, filterAfterSecond)
   
        // The filter should be the same
        if okBefore && filterBefore != nil {
                assert.Equal(t, filterBefore, filterAfter)
   ```



##########
pkg/integration/integration_test.go:
##########
@@ -0,0 +1,205 @@
+/*
+ * 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 integration
+
+import (
+       "testing"
+
+       "dubbo.apache.org/dubbo-go/v3/common/extension"
+       "github.com/stretchr/testify/assert"
+
+       "seata.apache.org/seata-go/pkg/constant"
+       "seata.apache.org/seata-go/pkg/integration/dubbo"
+)
+
+// TestInit tests the Init function
+func TestInit(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init successfully initializes dubbo integration",
+               },
+               {
+                       name: "Init can be called multiple times without error",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init - should not panic
+                       assert.NotPanics(t, func() {
+                               Init()
+                       })
+
+                       // Verify that the filter was registered
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Verify that the filter is the correct type
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+               })
+       }
+}
+
+// TestInit_FilterRegistration tests that Init registers the filter correctly
+func TestInit_FilterRegistration(t *testing.T) {
+       tests := []struct {
+               name          string
+               callInitTimes int
+       }{
+               {
+                       name:          "Single Init call",
+                       callInitTimes: 1,
+               },
+               {
+                       name:          "Multiple Init calls",
+                       callInitTimes: 3,
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init multiple times
+                       for i := 0; i < tt.callInitTimes; i++ {
+                               assert.NotPanics(t, func() {
+                                       Init()
+                               })
+                       }

Review Comment:
   Tests that call Init() multiple times are registering the filter in a shared 
global state (extension.SetFilter) without cleanup between test runs. This can 
cause test pollution where the state from one test affects subsequent tests. 
Consider adding t.Cleanup() to reset the filter state after each test, or 
document that these tests assume a specific execution order.



##########
pkg/integration/integration_test.go:
##########
@@ -0,0 +1,205 @@
+/*
+ * 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 integration
+
+import (
+       "testing"
+
+       "dubbo.apache.org/dubbo-go/v3/common/extension"
+       "github.com/stretchr/testify/assert"
+
+       "seata.apache.org/seata-go/pkg/constant"
+       "seata.apache.org/seata-go/pkg/integration/dubbo"
+)
+
+// TestInit tests the Init function
+func TestInit(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init successfully initializes dubbo integration",
+               },
+               {
+                       name: "Init can be called multiple times without error",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init - should not panic
+                       assert.NotPanics(t, func() {
+                               Init()
+                       })
+
+                       // Verify that the filter was registered
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Verify that the filter is the correct type
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+               })
+       }
+}
+
+// TestInit_FilterRegistration tests that Init registers the filter correctly
+func TestInit_FilterRegistration(t *testing.T) {
+       tests := []struct {
+               name          string
+               callInitTimes int
+       }{
+               {
+                       name:          "Single Init call",
+                       callInitTimes: 1,
+               },
+               {
+                       name:          "Multiple Init calls",
+                       callInitTimes: 3,
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init multiple times
+                       for i := 0; i < tt.callInitTimes; i++ {
+                               assert.NotPanics(t, func() {
+                                       Init()
+                               })
+                       }
+
+                       // Verify the filter is still registered correctly
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get the filter directly from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Verify both return the same filter instance
+                       dubboFilter2 := dubbo.GetDubboTransactionFilter()
+                       assert.Equal(t, dubboFilter, dubboFilter2, 
"GetDubboTransactionFilter should return same instance")
+               })
+       }
+}
+
+// TestInit_Integration tests the integration with dubbo package
+func TestInit_Integration(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Verify dubbo filter can be retrieved after Init",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Initialize
+                       Init()
+
+                       // Get filter from extension
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get filter from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Create another instance via the extension
+                       filterFunc, ok2 := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok2)
+                       assert.NotNil(t, filterFunc)
+
+                       // Both should be the same filter
+                       assert.Equal(t, filter, filterFunc)
+               })
+       }
+}
+
+// TestInit_NoSideEffects tests that Init has no unexpected side effects
+func TestInit_NoSideEffects(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init does not cause side effects",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Get state before Init
+                       filterBefore, okBefore := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Call Init
+                       Init()
+
+                       // Get state after Init
+                       filterAfter, okAfter := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Filter should be registered
+                       assert.True(t, okAfter)
+                       assert.NotNil(t, filterAfter)
+
+                       // Calling Init again should not change the filter
+                       Init()
+                       filterAfterSecond, okAfterSecond := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, okAfterSecond)
+                       assert.NotNil(t, filterAfterSecond)
+
+                       // The filter should be the same
+                       if okBefore && filterBefore != nil {
+                               assert.Equal(t, filterBefore, filterAfter)
+                       }
+               })
+       }
+}
+
+// TestInit_DubboFilterConsistency tests filter consistency
+func TestInit_DubboFilterConsistency(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Dubbo filter returns consistent singleton 
instance",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Initialize
+                       Init()
+
+                       // Get filter multiple times
+                       filter1 := dubbo.GetDubboTransactionFilter()
+                       filter2 := dubbo.GetDubboTransactionFilter()
+                       filter3 := dubbo.GetDubboTransactionFilter()
+
+                       // All should return the same instance (singleton 
pattern)
+                       assert.NotNil(t, filter1)
+                       assert.NotNil(t, filter2)
+                       assert.NotNil(t, filter3)
+                       assert.Equal(t, filter1, filter2)
+                       assert.Equal(t, filter2, filter3)
+               })
+       }

Review Comment:
   This test contains only a single test case without variation. The 
table-driven test structure is unnecessary here. Consider simplifying to a 
regular test function without the table-driven pattern.



##########
pkg/integration/integration_test.go:
##########
@@ -0,0 +1,205 @@
+/*
+ * 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 integration
+
+import (
+       "testing"
+
+       "dubbo.apache.org/dubbo-go/v3/common/extension"
+       "github.com/stretchr/testify/assert"
+
+       "seata.apache.org/seata-go/pkg/constant"
+       "seata.apache.org/seata-go/pkg/integration/dubbo"
+)
+
+// TestInit tests the Init function
+func TestInit(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init successfully initializes dubbo integration",
+               },
+               {
+                       name: "Init can be called multiple times without error",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init - should not panic
+                       assert.NotPanics(t, func() {
+                               Init()
+                       })
+
+                       // Verify that the filter was registered
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Verify that the filter is the correct type
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+               })
+       }
+}
+
+// TestInit_FilterRegistration tests that Init registers the filter correctly
+func TestInit_FilterRegistration(t *testing.T) {
+       tests := []struct {
+               name          string
+               callInitTimes int
+       }{
+               {
+                       name:          "Single Init call",
+                       callInitTimes: 1,
+               },
+               {
+                       name:          "Multiple Init calls",
+                       callInitTimes: 3,
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Call Init multiple times
+                       for i := 0; i < tt.callInitTimes; i++ {
+                               assert.NotPanics(t, func() {
+                                       Init()
+                               })
+                       }
+
+                       // Verify the filter is still registered correctly
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get the filter directly from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Verify both return the same filter instance
+                       dubboFilter2 := dubbo.GetDubboTransactionFilter()
+                       assert.Equal(t, dubboFilter, dubboFilter2, 
"GetDubboTransactionFilter should return same instance")
+               })
+       }
+}
+
+// TestInit_Integration tests the integration with dubbo package
+func TestInit_Integration(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Verify dubbo filter can be retrieved after Init",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Initialize
+                       Init()
+
+                       // Get filter from extension
+                       filter, ok := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok)
+                       assert.NotNil(t, filter)
+
+                       // Get filter from dubbo package
+                       dubboFilter := dubbo.GetDubboTransactionFilter()
+                       assert.NotNil(t, dubboFilter)
+
+                       // Create another instance via the extension
+                       filterFunc, ok2 := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, ok2)
+                       assert.NotNil(t, filterFunc)
+
+                       // Both should be the same filter
+                       assert.Equal(t, filter, filterFunc)
+               })
+       }
+}
+
+// TestInit_NoSideEffects tests that Init has no unexpected side effects
+func TestInit_NoSideEffects(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Init does not cause side effects",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Get state before Init
+                       filterBefore, okBefore := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Call Init
+                       Init()
+
+                       // Get state after Init
+                       filterAfter, okAfter := 
extension.GetFilter(constant.SeataFilterKey)
+
+                       // Filter should be registered
+                       assert.True(t, okAfter)
+                       assert.NotNil(t, filterAfter)
+
+                       // Calling Init again should not change the filter
+                       Init()
+                       filterAfterSecond, okAfterSecond := 
extension.GetFilter(constant.SeataFilterKey)
+                       assert.True(t, okAfterSecond)
+                       assert.NotNil(t, filterAfterSecond)
+
+                       // The filter should be the same
+                       if okBefore && filterBefore != nil {
+                               assert.Equal(t, filterBefore, filterAfter)
+                       }
+               })
+       }
+}
+
+// TestInit_DubboFilterConsistency tests filter consistency
+func TestInit_DubboFilterConsistency(t *testing.T) {
+       tests := []struct {
+               name string
+       }{
+               {
+                       name: "Dubbo filter returns consistent singleton 
instance",
+               },
+       }
+
+       for _, tt := range tests {
+               t.Run(tt.name, func(t *testing.T) {
+                       // Initialize
+                       Init()
+
+                       // Get filter multiple times
+                       filter1 := dubbo.GetDubboTransactionFilter()
+                       filter2 := dubbo.GetDubboTransactionFilter()
+                       filter3 := dubbo.GetDubboTransactionFilter()
+
+                       // All should return the same instance (singleton 
pattern)
+                       assert.NotNil(t, filter1)
+                       assert.NotNil(t, filter2)
+                       assert.NotNil(t, filter3)
+                       assert.Equal(t, filter1, filter2)
+                       assert.Equal(t, filter2, filter3)
+               })
+       }

Review Comment:
   This test contains only a single test case without variation. The 
table-driven test pattern adds unnecessary boilerplate here. Consider 
simplifying to a regular test function or add meaningful test variations.
   ```suggestion
        // Get state before Init
        filterBefore, okBefore := extension.GetFilter(constant.SeataFilterKey)
   
        // Call Init
        Init()
   
        // Get state after Init
        filterAfter, okAfter := extension.GetFilter(constant.SeataFilterKey)
   
        // Filter should be registered
        assert.True(t, okAfter)
        assert.NotNil(t, filterAfter)
   
        // Calling Init again should not change the filter
        Init()
        filterAfterSecond, okAfterSecond := 
extension.GetFilter(constant.SeataFilterKey)
        assert.True(t, okAfterSecond)
        assert.NotNil(t, filterAfterSecond)
   
        // The filter should be the same
        if okBefore && filterBefore != nil {
                assert.Equal(t, filterBefore, filterAfter)
        }
   }
   
   // TestInit_DubboFilterConsistency tests filter consistency
   func TestInit_DubboFilterConsistency(t *testing.T) {
        // Initialize
        Init()
   
        // Get filter multiple times
        filter1 := dubbo.GetDubboTransactionFilter()
        filter2 := dubbo.GetDubboTransactionFilter()
        filter3 := dubbo.GetDubboTransactionFilter()
   
        // All should return the same instance (singleton pattern)
        assert.NotNil(t, filter1)
        assert.NotNil(t, filter2)
        assert.NotNil(t, filter3)
        assert.Equal(t, filter1, filter2)
        assert.Equal(t, filter2, filter3)
   ```



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