/**
 * Copyright (C) 2009-2013 FoundationDB, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.foundationdb.sql.optimizer;

import com.foundationdb.sql.NamedParamsTestBase;
import com.foundationdb.sql.TestBase;

import com.foundationdb.sql.parser.DMLStatementNode;
import com.foundationdb.sql.parser.StatementNode;

import com.foundationdb.junit.NamedParameterizedRunner;
import com.foundationdb.junit.NamedParameterizedRunner.TestParameters;
import com.foundationdb.junit.Parameterization;
import org.junit.Test;
import org.junit.runner.RunWith;
import static org.junit.Assert.*;

import java.util.Collection;

@RunWith(NamedParameterizedRunner.class)
public class DistinctEliminatorTest extends DistinctEliminatorTestBase
                                    implements TestBase.GenerateAndCheckResult
{

    @TestParameters
    public static Collection<Parameterization> statements() throws Exception {
        return NamedParamsTestBase.namedCases(sqlAndExpected(RESOURCE_DIR));
    }

    public DistinctEliminatorTest(String caseName, String sql, 
                                  String expected, String error) {
        super(caseName, sql, expected, error);
    }

    @Test
    public void testEliminate() throws Exception {
        generateAndCheckResult();
    }

    @Override
    public String generateResult() throws Exception {
        StatementNode stmt = parser.parseStatement(sql);
        binder.bind(stmt);
        stmt = booleanNormalizer.normalize(stmt);
        typeComputer.compute(stmt);
        stmt = subqueryFlattener.flatten((DMLStatementNode)stmt);
        stmt = distinctEliminator.eliminate((DMLStatementNode)stmt);
        return unparser.toString(stmt);
    }

    @Override
    public void checkResult(String result) {
        assertEquals(caseName, expected.trim(), result);
    }

}