001/*
002 * ModeShape (http://www.modeshape.org)
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *       http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.modeshape.common.text;
017
018import static org.hamcrest.core.Is.is;
019import static org.junit.Assert.assertThat;
020import org.junit.Test;
021
022public class PositionTest {
023
024    private int combinedIndex( int firstIndex,
025                               int secondIndex ) {
026        Position first = new Position(firstIndex, 1, 0);
027        Position second = new Position(secondIndex, 1, 0);
028
029        int firstPlusSecond = first.add(second).getIndexInContent();
030        int secondPlusFirst = second.add(first).getIndexInContent();
031
032        assertThat(firstPlusSecond, is(secondPlusFirst));
033
034        return firstPlusSecond;
035    }
036
037    @Test
038    public void shouldAddNoContentPositionToValidPosition() {
039        // -1 to >=0
040        assertThat(combinedIndex(-1, 0), is(0));
041        assertThat(combinedIndex(-1, 1), is(1));
042        assertThat(combinedIndex(-1, 10), is(10));
043    }
044
045    @Test
046    public void shouldAddValidPositionToNoContentPosition() {
047        // >= 0 to -1
048        assertThat(combinedIndex(0, -1), is(0));
049        assertThat(combinedIndex(1, -1), is(1));
050        assertThat(combinedIndex(10, -1), is(10));
051    }
052
053    @Test
054    public void shouldAddValidPositionToValidPosition() {
055        // positive to positive
056        assertThat(combinedIndex(1, 1), is(2));
057        assertThat(combinedIndex(10, 1), is(11));
058        assertThat(combinedIndex(1, 10), is(11));
059        assertThat(combinedIndex(10, 10), is(20));
060    }
061
062    @Test
063    public void shouldAddStartingPositionToStartingPosition() {
064        // 0 to 0
065        assertThat(combinedIndex(0, 0), is(0));
066    }
067
068    @Test
069    public void shouldAddNoContentPositionToNoContentPosition() {
070        // -1 to -1
071        assertThat(combinedIndex(-1, -1), is(-1));
072        assertThat(combinedIndex(-10, -1), is(-1));
073        assertThat(combinedIndex(-1, -10), is(-1));
074    }
075}