/*
 * Licensed 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 io.prestosql.sql.planner.iterative.rule;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import io.prestosql.spi.block.SortOrder;
import io.prestosql.sql.planner.Symbol;
import io.prestosql.sql.planner.assertions.ExpressionMatcher;
import io.prestosql.sql.planner.iterative.rule.test.BaseRuleTest;
import org.testng.annotations.Test;

import java.util.Optional;

import static io.prestosql.sql.planner.assertions.PlanMatchPattern.filter;
import static io.prestosql.sql.planner.assertions.PlanMatchPattern.functionCall;
import static io.prestosql.sql.planner.assertions.PlanMatchPattern.specification;
import static io.prestosql.sql.planner.assertions.PlanMatchPattern.strictProject;
import static io.prestosql.sql.planner.assertions.PlanMatchPattern.values;
import static io.prestosql.sql.planner.assertions.PlanMatchPattern.window;

public class TestImplementLimitWithTies
        extends BaseRuleTest
{
    @Test
    public void testReplaceLimitWithTies()
    {
        tester().assertThat(new ImplementLimitWithTies())
                .on(p -> {
                    Symbol a = p.symbol("a");
                    Symbol b = p.symbol("b");
                    return p.limit(
                            2,
                            ImmutableList.of(a),
                            p.values(a, b));
                })
                .matches(
                        strictProject(
                                ImmutableMap.of("a", new ExpressionMatcher("a"), "b", new ExpressionMatcher("b")),
                                filter(
                                        "rank_num <= BIGINT '2'",
                                        window(
                                                windowMatcherBuilder -> windowMatcherBuilder
                                                        .specification(specification(
                                                                ImmutableList.of(),
                                                                ImmutableList.of("a"),
                                                                ImmutableMap.of("a", SortOrder.ASC_NULLS_FIRST)))
                                                        .addFunction(
                                                                "rank_num",
                                                                functionCall(
                                                                        "rank",
                                                                        Optional.empty(),
                                                                        ImmutableList.of())),
                                                values("a", "b")))));
    }
}
