#28537 Add more unit tests for ConstraintReviseEngine

infra/common/src/test/java/org/apache/shardingsphere/infra/metadata/database/schema/reviser/constraint/ConstraintReviseEngineTest.java

@@ -0,0 +1,85 @@
+/*
+ * 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.infra.metadata.database.schema.reviser.constraint;
+
+import org.apache.shardingsphere.infra.database.core.metadata.data.model.ConstraintMetaData;
+import org.apache.shardingsphere.infra.metadata.database.schema.reviser.MetaDataReviseEntry;
+import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.Optional;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class ConstraintReviseEngineTest<T extends ShardingSphereRule> {
+
+    @Mock
+    private T mockRule;
+
+    @Mock
+    private MetaDataReviseEntry<T> mockMetaDataReviseEntry;
+
+    @InjectMocks
+    private ConstraintReviseEngine<T> engine;
+
+    @Test
+    void assertNotPresentReviserReturnsOriginalConstraints() {
+        String tableName = "tableName";
+        doReturn(Optional.empty()).when(mockMetaDataReviseEntry).getConstraintReviser(mockRule, tableName);
+        Collection<ConstraintMetaData> expectedConstraints = new LinkedHashSet<>();
+        expectedConstraints.add(new ConstraintMetaData("constraint1", tableName));
+        expectedConstraints.add(new ConstraintMetaData("constraint2", tableName));
+
+        Collection<ConstraintMetaData> actualConstraints = engine.revise(tableName, expectedConstraints);
+        assertThat(actualConstraints, is(expectedConstraints));
+    }
+
+    @Test
+    void assertReviserReturnsRevisedConstraints() {
+        String tableName = "tableName";
+        ConstraintReviser<T> reviser = mock(ConstraintReviser.class);
+        doReturn(Optional.of(reviser)).when(mockMetaDataReviseEntry).getConstraintReviser(mockRule, tableName);
+
+        Collection<ConstraintMetaData> originalConstraints = new LinkedHashSet<>();
+        ConstraintMetaData constraint1 = new ConstraintMetaData("constraint1", tableName);
+        ConstraintMetaData constraint2 = new ConstraintMetaData("constraint2", tableName);
+        originalConstraints.add(constraint1);
+        originalConstraints.add(constraint2);
+
+        ConstraintMetaData constraint3 = new ConstraintMetaData("constraint3", tableName);
+        when(reviser.revise(tableName, constraint1, mockRule)).thenReturn(Optional.of(constraint3));
+        when(reviser.revise(tableName, constraint2, mockRule)).thenReturn(Optional.empty());
+        Collection<ConstraintMetaData> expectedConstraints = new LinkedHashSet<>();
+        expectedConstraints.add(constraint3);
+
+        Collection<ConstraintMetaData> actualConstraints = engine.revise(tableName, originalConstraints);
+        assertThat(actualConstraints, is(expectedConstraints));
+    }
+
+}