/*
 * 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.assertions;

import io.prestosql.Session;
import io.prestosql.cost.StatsProvider;
import io.prestosql.metadata.Metadata;
import io.prestosql.sql.planner.plan.AggregationNode;
import io.prestosql.sql.planner.plan.AggregationNode.Step;
import io.prestosql.sql.planner.plan.PlanNode;

import static com.google.common.base.Preconditions.checkState;
import static io.prestosql.sql.planner.assertions.MatchResult.NO_MATCH;
import static io.prestosql.sql.planner.assertions.MatchResult.match;

public class AggregationStepMatcher
        implements Matcher
{
    private final Step step;

    public AggregationStepMatcher(Step step)
    {
        this.step = step;
    }

    @Override
    public boolean shapeMatches(PlanNode node)
    {
        return node instanceof AggregationNode;
    }

    @Override
    public MatchResult detailMatches(PlanNode node, StatsProvider stats, Session session, Metadata metadata, SymbolAliases symbolAliases)
    {
        checkState(shapeMatches(node), "Plan testing framework error: shapeMatches returned false in detailMatches in %s", this.getClass().getName());
        AggregationNode aggregationNode = (AggregationNode) node;

        if (aggregationNode.getStep() != step) {
            return NO_MATCH;
        }
        return match();
    }
}

@@ -870,16 +870,81 @@
 nNode;%0A%0A
+import static com.google.common.base.MoreObjects.toStringHelper;%0A
 import s
@@ -1934,11 +1934,167 @@
 );%0A    %7D
+%0A%0A    @Override%0A    public String toString()%0A    %7B%0A        return toStringHelper(this)%0A                .add(%22step%22, step)%0A                .toString();%0A    %7D
 %0A%7D%0A

Add missing toString to AggregationStepMatcher