/*
 * Copyright (c) 2012, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation
//
package org.eclipse.persistence.jpa.tests.jpql.parser;

import org.junit.Test;
import static org.eclipse.persistence.jpa.tests.jpql.parser.JPQLParserTester.*;

/**
 * Tests parsing hierarchical query clause.
 *
 * @see org.eclipse.persistence.jpa.jpql.parser.HierarchicalQueryClause HierarchicalQueryClause
 *
 * @version 2.5
 * @since 2.5
 * @author Pascal Filion
 */
@SuppressWarnings("nls")
public final class HierarchicalQueryClauseTest extends JPQLParserTest {

    @Test
    public void test_JPQLQuery_01() {

        String jpqlQuery = "SELECT e FROM Employee e START WITH CONNECT BY";

        StartWithClauseTester startWithClause = startWith(nullExpression());
        startWithClause.hasSpaceAfterIdentifier = true;

        ConnectByClauseTester connectByClause = connectBy(nullExpression());
        connectByClause.hasSpaceAfterConnectBy = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            startWithClause,
            connectByClause
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_02() {

        String jpqlQuery = "SELECT e FROM Employee e START WITH CONNECT BY ORDER SIBLINGS BY";

        StartWithClauseTester startWithClause = startWith(nullExpression());
        startWithClause.hasSpaceAfterIdentifier = true;

        ConnectByClauseTester connectByClause = connectBy(nullExpression());
        connectByClause.hasSpaceAfterConnectBy = true;

        OrderSiblingsByClauseTester orderSiblingsByClause = orderSiblingsBy(nullExpression());
        orderSiblingsByClause.hasSpaceAfterIdentifier = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            startWithClause,
            connectByClause,
            orderSiblingsByClause
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;
        hierarchicalQuery.hasSpaceAfterConnectByClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_03() {

        String jpqlQuery = "SELECT e FROM Employee e START WITH CONNECT BY ORDER SIBLINGS BY ";

        StartWithClauseTester startWithClause = startWith(nullExpression());
        startWithClause.hasSpaceAfterIdentifier = true;

        ConnectByClauseTester connectByClause = connectBy(nullExpression());
        connectByClause.hasSpaceAfterConnectBy = true;

        OrderSiblingsByClauseTester orderSiblingsByClause = orderSiblingsBy(nullExpression());
        orderSiblingsByClause.hasSpaceAfterIdentifier = true;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            startWithClause,
            connectByClause,
            orderSiblingsByClause
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;
        hierarchicalQuery.hasSpaceAfterConnectByClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_04() {

        String jpqlQuery = "SELECT e FROM Employee e START WITH ORDER SIBLINGS BY";

        StartWithClauseTester startWithClause = startWith(nullExpression());
        startWithClause.hasSpaceAfterIdentifier = true;

        OrderSiblingsByClauseTester orderSiblingsByClause = orderSiblingsBy(nullExpression());
        orderSiblingsByClause.hasSpaceAfterIdentifier = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            startWithClause,
            nullExpression(),
            orderSiblingsByClause
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_05() {

        String jpqlQuery = "SELECT e FROM Employee e ORDER SIBLINGS BY";

        OrderSiblingsByClauseTester orderSiblingsByClause = orderSiblingsBy(nullExpression());
        orderSiblingsByClause.hasSpaceAfterIdentifier = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            nullExpression(),
            nullExpression(),
            orderSiblingsByClause
        );

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_06() {

        String jpqlQuery = "SELECT e FROM Employee e CONNECT BY ORDER SIBLINGS BY";

        ConnectByClauseTester connectByClause = connectBy(nullExpression());
        connectByClause.hasSpaceAfterConnectBy = true;

        OrderSiblingsByClauseTester orderSiblingsByClause = orderSiblingsBy(nullExpression());
        orderSiblingsByClause.hasSpaceAfterIdentifier = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            nullExpression(),
            connectByClause,
            orderSiblingsByClause
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;
        hierarchicalQuery.hasSpaceAfterConnectByClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_07() {

        String jpqlQuery = "SELECT e FROM Employee e CONNECT BY";

        ConnectByClauseTester connectByClause = connectBy(nullExpression());
        connectByClause.hasSpaceAfterConnectBy = false;

        HierarchicalQueryClauseTester hierarchicalQuery = hierarchicalQueryClause(
            nullExpression(),
            connectByClause,
            nullExpression()
        );

        hierarchicalQuery.hasSpaceAfterStartWithClause = false;

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e", hierarchicalQuery)
        );

        testInvalidQuery(jpqlQuery, selectStatement);
    }
}