gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/SubstringGlobalStepTest.java

/*
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 * 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
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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.Collections;
import java.util.List;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;

public class SubstringGlobalStepTest extends StepTest {

    @Override
    protected List<Traversal> getTraversals() {
        return Arrays.asList(
                __.substring(1),
                __.substring(1, 2));
    }

    @Test
    public void testReturnTypes() {
        assertEquals("hello world", __.__("hello world").substring(0).next());
        assertEquals("ello world", __.__("hello world").substring(1).next());
        assertEquals("d", __.__("hello world").substring(-1).next());
        assertEquals("d", __.__("hello world").substring(10).next());
        assertEquals("", __.__("hello world").substring(11).next());

        assertEquals("", __.__("hello world").substring(0, 0).next());
        assertEquals("h", __.__("hello world").substring(0, 1).next());
        assertEquals("", __.__("hello world").substring(1, 0).next());
        assertEquals("hello worl", __.__("hello world").substring(0, -1).next());
        assertEquals("", __.__("hello world").substring(-1, 0).next());
        assertEquals("ello worl", __.__("hello world").substring(1, -1).next());
        assertEquals("", __.__("hello world").substring(-1, 1).next());
        assertEquals("rl", __.__("hello world").substring(-3, -1).next());
        assertEquals("", __.__("hello world").substring(-1, -3).next());
        assertEquals("d", __.__("hello world").substring(-1, 11).next());
        assertEquals("ello world", __.__("hello world").substring(1, 11).next());
        assertEquals("d", __.__("hello world").substring(10, 11).next());
        assertEquals("hello world", __.__("hello world").substring(-11, 11).next());
        assertEquals("h", __.__("hello world").substring(-11, 1).next());

        assertArrayEquals(new String[]{"st", "llo wo", null, ""},
                __.__("test", "hello world", null, "").substring(2, 8).toList().toArray());
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowWithIncomingArrayList() {
        __.__(Arrays.asList("aa", "bb", "cc")).substring(1).next();
    }

}