Add test cases on RuleConfigurationPersistDecorateEngine (apache#32920)

mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextsFactory.java

@@ -83,7 +83,8 @@ public final class MetaDataContextsFactory {
      */
     public static MetaDataContexts create(final MetaDataPersistService persistService, final ContextManagerBuilderParameter param,
                                           final ComputeNodeInstanceContext computeNodeInstanceContext) throws SQLException {
-        return persistService.getDatabaseMetaDataService().loadAllDatabaseNames().isEmpty() ? createByLocal(persistService, param, computeNodeInstanceContext)
+        return persistService.getDatabaseMetaDataService().loadAllDatabaseNames().isEmpty()
+                ? createByLocal(persistService, param, computeNodeInstanceContext)
                 : createByRepository(persistService, param, computeNodeInstanceContext);
     }
 

mode/core/src/test/java/org/apache/shardingsphere/mode/metadata/decorator/RuleConfigurationPersistDecorateEngineTest.java

@@ -0,0 +1,91 @@
+/*
+ * 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 org.apache.shardingsphere.mode.metadata.decorator;
+
+import org.apache.shardingsphere.infra.config.rule.RuleConfiguration;
+import org.apache.shardingsphere.infra.instance.ComputeNodeInstanceContext;
+import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
+import org.apache.shardingsphere.mode.spi.RuleConfigurationPersistDecorator;
+import org.apache.shardingsphere.test.mock.AutoMockExtension;
+import org.apache.shardingsphere.test.mock.StaticMockSettings;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(AutoMockExtension.class)
+@StaticMockSettings(TypedSPILoader.class)
+class RuleConfigurationPersistDecorateEngineTest {
+
+    private RuleConfigurationPersistDecorateEngine decorateEngine;
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private ComputeNodeInstanceContext computeNodeInstanceContext;
+
+    @BeforeEach
+    void setUp() {
+        decorateEngine = new RuleConfigurationPersistDecorateEngine(computeNodeInstanceContext);
+    }
+
+    @Test
+    void assertDecorateIfNotClusterMode() {
+        Collection<RuleConfiguration> ruleConfigs = Collections.singleton(mock(RuleConfiguration.class));
+        assertThat(decorateEngine.decorate(ruleConfigs), is(ruleConfigs));
+    }
+
+    @Test
+    void assertDecorateIfClusterMode() {
+        when(computeNodeInstanceContext.getModeConfiguration().isCluster()).thenReturn(true);
+        when(TypedSPILoader.findService(eq(RuleConfigurationPersistDecorator.class), any())).thenReturn(Optional.empty());
+        Collection<RuleConfiguration> ruleConfigs = Collections.singletonList(mock(RuleConfiguration.class));
+        assertThat(decorateEngine.decorate(ruleConfigs), is(ruleConfigs));
+    }
+
+    @Test
+    void assertRestoreIfNotClusterMode() {
+        Collection<RuleConfiguration> ruleConfigs = Collections.singleton(mock(RuleConfiguration.class));
+        assertThat(decorateEngine.restore(ruleConfigs), is(ruleConfigs));
+    }
+
+    @Test
+    void assertRestoreIfClusterMode() {
+        when(computeNodeInstanceContext.getModeConfiguration().isCluster()).thenReturn(true);
+        when(TypedSPILoader.findService(eq(RuleConfigurationPersistDecorator.class), any())).thenReturn(Optional.empty());
+        Collection<RuleConfiguration> ruleConfigs = Collections.singletonList(mock(RuleConfiguration.class));
+        assertThat(decorateEngine.restore(ruleConfigs), is(ruleConfigs));
+    }
+
+    @Test
+    void assertTryRestore() {
+        when(TypedSPILoader.findService(eq(RuleConfigurationPersistDecorator.class), any())).thenReturn(Optional.empty());
+        Collection<RuleConfiguration> ruleConfigs = Collections.singletonList(mock(RuleConfiguration.class));
+        assertThat(decorateEngine.tryRestore(ruleConfigs), is(ruleConfigs));
+    }
+}