/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tinkerpop.gremlin.process.traversal.step.filter;
import org.apache.tinkerpop.gremlin.process.traversal.Scope;
import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
import org.apache.tinkerpop.gremlin.process.traversal.step.StepTest;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* @author Daniel Kuppitz (http://gremlin.guru)
*/
public class SampleGlobalStepTest extends StepTest {
@Override
protected List<Traversal> getTraversals() {
return Arrays.asList(
__.sample(5),
__.sample(10)
);
}
@Test
public void shouldSelectSubsetsCorrectly() {
final List<Integer> list = new ArrayList<>();
for (int i = 0; i < 100; i++) {
list.add(i);
}
for(int i=0; i<100; i++) {
List<Integer> result;
result = (List) __.inject(list).unfold().sample(i).toList();
assertEquals(i, result.size());
assertEquals(i, new HashSet<>(result).size());
assertTrue(list.containsAll(result));
}
}
}