/*
 * 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.map;

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.Arrays;
import java.util.List;

import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.fail;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public class ProjectStepTest extends StepTest {

    @Override
    protected List<Traversal> getTraversals() {
        return Arrays.asList(
                __.project("x", "y"),
                __.project("x"),
                __.project("y"),
                __.project("x", "y").by(__.outE().count()).by("name"),
                __.project("x", "y").by("age").by("name"),
                __.project("x", "y").by(__.outE().count()),
                __.project("x").by(__.outE().count()),
                __.project("y").by("name")
        );
    }

    @Test
    public void shouldThrowWhenDuplicateKeySupplied() {
        try {
            __.project("x", "x");
            fail("Should throw an exception.");
        } catch (final Exception re) {
            assertThat(re, instanceOf(IllegalArgumentException.class));
            assertThat(re.getMessage(), is("keys must be unique in ProjectStep"));
        }
    }
}