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

/**
 * @version 2.5
 * @since 2.4
 * @author Pascal Filion
 */
@SuppressWarnings("nls")
public final class EclipseLinkComparisonExpressionTest extends JPQLParserTest {

    protected boolean isEclipseLink2_0() {
        return EclipseLinkVersion.value(getGrammar().getProviderVersion()) == EclipseLinkVersion.VERSION_2_0;
    }

    @Test
    public void test_JPQLQuery_01() {

        if (isEclipseLink2_0()) {
            return;
        }

        String query = "SELECT e FROM Employee e WHERE e.age !=";

        ComparisonExpressionTester comparison = path("e.age").notEqual(nullExpression());
        comparison.hasSpaceAfterIdentifier = false;

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

        testInvalidQuery(query, selectStatement);
    }

    @Test
    public void test_JPQLQuery_02() {

        if (isEclipseLink2_0()) {
            return;
        }

        String query = "SELECT e FROM Employee e WHERE e.age != ";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(path("e.age").notEqual(nullExpression()))
        );

        testInvalidQuery(query, selectStatement);
    }

    @Test
    public void test_JPQLQuery_03() {

        String query = "SELECT e FROM Employee e WHERE e.age != 'JPQL'";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(path("e.age").notEqual(string("'JPQL'")))
        );

        testQuery(query, selectStatement);
    }

    @Test
    public void test_JPQLQuery_04() {

        String query = "SELECT e FROM Employee e WHERE e.age != 'JPQL' GROUP BY e.name";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(path("e.age").notEqual(string("'JPQL'"))),
            groupBy(path("e.name"))
        );

        testQuery(query, selectStatement);
    }

    @Test
    public void test_JPQLQuery_05() {

        if (isEclipseLink2_0()) {
            return;
        }

        String query = "SELECT e FROM Employee e WHERE != 'JPQL' GROUP BY e.name";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(nullExpression().notEqual(string("'JPQL'"))),
            groupBy(path("e.name"))
        );

        testInvalidQuery(query, selectStatement);
    }

    @Test
    public void test_JPQLQuery_06() {

        if (isEclipseLink2_0()) {
            return;
        }

        String query = "SELECT e FROM Employee e WHERE != 'JPQL'";

        ExpressionTester selectStatement = selectStatement(
            select(variable("e")),
            from("Employee", "e"),
            where(nullExpression().notEqual(string("'JPQL'")))
        );

        testInvalidQuery(query, selectStatement);
    }
}