/*
 * Copyright © 2014 - 2021 Leipzig University (Database Research Group)
 *
 * 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 org.gradoop.flink.model.impl.operators.base;

import org.gradoop.flink.model.api.operators.UnaryBaseGraphCollectionToBaseGraphOperator;
import org.gradoop.flink.model.impl.epgm.GraphCollection;
import org.gradoop.flink.model.impl.epgm.LogicalGraph;
import org.gradoop.flink.util.FlinkAsciiGraphLoader;

import static org.junit.Assert.assertTrue;

public abstract class ReducibleBinaryOperatorsTestBase extends BinaryGraphOperatorsTestBase {

  protected void checkExpectationsEqualResults(FlinkAsciiGraphLoader loader,
    UnaryBaseGraphCollectionToBaseGraphOperator<GraphCollection, LogicalGraph> operator)
    throws Exception {
    // overlap
    GraphCollection col13 = loader.getGraphCollectionByVariables("g1", "g3");

    LogicalGraph exp13 = loader.getLogicalGraphByVariable("exp13");

    // no overlap
    GraphCollection col12 = loader.getGraphCollectionByVariables("g1", "g2");

    LogicalGraph exp12 = loader.getLogicalGraphByVariable("exp12");

    // full overlap
    GraphCollection col14 = loader.getGraphCollectionByVariables("g1", "g4");

    LogicalGraph exp14 = loader.getLogicalGraphByVariable("exp14");

    assertTrue("partial overlap failed",
      operator.execute(col13).equalsByElementData(exp13).collect().get(0));
    assertTrue("without overlap failed",
      operator.execute(col12).equalsByElementData(exp12).collect().get(0));
    assertTrue("with full overlap failed",
      operator.execute(col14).equalsByElementData(exp14).collect().get(0));
  }
}
