add unit test for SQLStatementUtils

shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/test/java/org/apache/shardingsphere/sql/parser/sql/common/util/SQLStatementUtilsTest.java

@@ -0,0 +1,95 @@
+/*
+ * 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.sql.parser.sql.common.util;
+
+import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.assignment.SetAssignmentSegment;
+import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.column.OnDuplicateKeyColumnsSegment;
+import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.WithSegment;
+import org.apache.shardingsphere.sql.parser.sql.dialect.statement.mysql.dml.MySQLInsertStatement;
+import org.apache.shardingsphere.sql.parser.sql.dialect.statement.postgresql.dml.PostgreSQLInsertStatement;
+import org.apache.shardingsphere.sql.parser.sql.dialect.statement.sqlserver.dml.SQLServerInsertStatement;
+import org.junit.Test;
+
+import java.util.Collections;
+import java.util.Optional;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class SQLStatementUtilsTest {
+
+    @Test
+    public void assertGetOnDuplicateKeyColumnsSegmentWithOnDuplicateKeyColumnsSegmentForMySQL() {
+        MySQLInsertStatement insertStatement = new MySQLInsertStatement();
+        insertStatement.setOnDuplicateKeyColumns(new OnDuplicateKeyColumnsSegment(0, 0, Collections.emptyList()));
+        Optional<OnDuplicateKeyColumnsSegment> onDuplicateKeyColumnsSegment = SQLStatementUtils.getOnDuplicateKeyColumnsSegment(insertStatement);
+        assertTrue(onDuplicateKeyColumnsSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetOnDuplicateKeyColumnsSegmentWithoutOnDuplicateKeyColumnsSegmentForMySQL() {
+        MySQLInsertStatement insertStatement = new MySQLInsertStatement();
+        Optional<OnDuplicateKeyColumnsSegment> onDuplicateKeyColumnsSegment = SQLStatementUtils.getOnDuplicateKeyColumnsSegment(insertStatement);
+        assertFalse(onDuplicateKeyColumnsSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetSetAssignmentSegmentWithSetAssignmentSegmentForMySQL() {
+        MySQLInsertStatement insertStatement = new MySQLInsertStatement();
+        insertStatement.setSetAssignment(new SetAssignmentSegment(0, 0, Collections.emptyList()));
+        Optional<SetAssignmentSegment> setAssignmentSegment = SQLStatementUtils.getSetAssignmentSegment(insertStatement);
+        assertTrue(setAssignmentSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetSetAssignmentSegmentWithoutSetAssignmentSegmentForMySQL() {
+        MySQLInsertStatement insertStatement = new MySQLInsertStatement();
+        Optional<SetAssignmentSegment> setAssignmentSegment = SQLStatementUtils.getSetAssignmentSegment(insertStatement);
+        assertFalse(setAssignmentSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetWithSegmentWithWithSegmentForPostgreSQL() {
+        PostgreSQLInsertStatement insertStatement = new PostgreSQLInsertStatement();
+        insertStatement.setWithSegment(new WithSegment(0, 0, Collections.emptyList()));
+        Optional<WithSegment> withSegment = SQLStatementUtils.getWithSegment(insertStatement);
+        assertTrue(withSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetWithSegmentWithoutWithSegmentForPostgreSQL() {
+        PostgreSQLInsertStatement insertStatement = new PostgreSQLInsertStatement();
+        Optional<WithSegment> withSegment = SQLStatementUtils.getWithSegment(insertStatement);
+        assertFalse(withSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetWithSegmentWithWithSegmentForSQLServer() {
+        SQLServerInsertStatement insertStatement = new SQLServerInsertStatement();
+        insertStatement.setWithSegment(new WithSegment(0, 0, Collections.emptyList()));
+        Optional<WithSegment> withSegment = SQLStatementUtils.getWithSegment(insertStatement);
+        assertTrue(withSegment.isPresent());
+    }
+
+    @Test
+    public void assertGetWithSegmentWithoutWithSegmentForSQLServer() {
+        SQLServerInsertStatement insertStatement = new SQLServerInsertStatement();
+        Optional<WithSegment> withSegment = SQLStatementUtils.getWithSegment(insertStatement);
+        assertFalse(withSegment.isPresent());
+    }
+}