jpa/org.eclipse.persistence.jpa.jpql/src/test/java/org/eclipse/persistence/jpa/tests/jpql/parser/SubExpressionTest.java

/*
 * Copyright (c) 2006, 2020 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.*;

@SuppressWarnings("nls")
public final class SubExpressionTest extends JPQLParserTest {

    @Test
    public void test_JPQLQuery_01() {

        String jpqlQuery = "SELECT e " +
                           "FROM Employee e " +
                           "WHERE (x > 2) AND (AVG (e.name) <> TRIM (e.name))";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(
                    sub(variable("x").greaterThan(numeric(2)))
                .and(
                    sub(avg("e.name").different(trim(path("e.name"))))
                )
            )
        );

        testQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_02() {

        String jpqlQuery = "SELECT e " +
                           "FROM Employee e " +
                           "WHERE (x > 2) AND ((AVG (e.name) <> TRIM (e.name)))";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(
                    sub(variable("x").greaterThan(numeric(2)))
                .and(
                    sub(sub(
                        avg("e.name").different(trim(path("e.name")))
                    ))
                )
            )
        );

        testQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_03() {

        String jpqlQuery = "SELECT e " +
                           "FROM Employee e " +
                           "WHERE (((e.name LIKE 'Pascal')) AND ((CURRENT_DATE) > 2))";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(
                sub(
                        sub(sub(path("e.name").like(string("'Pascal'"))))
                    .and(
                        sub(sub(CURRENT_DATE()).greaterThan(numeric(2)))
                    )
                )
            )
        );

        testQuery(jpqlQuery, selectStatement);
    }

    @Test
    public void test_JPQLQuery_04() {

        String jpqlQuery = "select (), ((), ()), (,), from Employee e";

        CollectionExpressionTester collection = collection(
            nullExpression(),
            nullExpression()
        );
        collection.spaces[0] = false;

        SelectStatementTester selectStatement = selectStatement(
            select(
                collection(
                    sub(nullExpression()),
                    sub(collection(
                        sub(nullExpression()),
                        sub(nullExpression())
                    )),
                    sub(collection),
                    nullExpression()
                )
            ),
            from("Employee", "e")
        );

        selectStatement.hasSpaceAfterSelect = false;
        testInvalidQuery(jpqlQuery, selectStatement);
    }
}