SourceRangeUtilsTest.java example

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eclipse3-master
/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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 com.google.dart.tools.core.internal.util;

import com.google.dart.engine.utilities.source.SourceRange;

import junit.framework.TestCase;

/**
 * Test for {@link SourceRangeUtils}.
 */
public class SourceRangeUtilsTest extends TestCase {
  /**
   * Test for {@link SourceRangeUtils#contains(SourceRange, int)}
   */
  public void test_contains() throws Exception {
    SourceRange r = new SourceRange(0, 3);
    assertFalse(SourceRangeUtils.contains(r, -1));
    assertTrue(SourceRangeUtils.contains(r, 0));
    assertTrue(SourceRangeUtils.contains(r, 1));
    assertTrue(SourceRangeUtils.contains(r, 2));
    assertFalse(SourceRangeUtils.contains(r, 3));
  }

  /**
   * Test for {@link SourceRangeUtils#covers(SourceRange, SourceRange)}
   */
  public void test_covers() throws Exception {
    SourceRange thisRange = new SourceRange(5, 10);
    // ends before
    assertFalse(SourceRangeUtils.covers(thisRange, new SourceRange(0, 3)));
    // starts after
    assertFalse(SourceRangeUtils.covers(thisRange, new SourceRange(20, 3)));
    // only intersects
    assertFalse(SourceRangeUtils.covers(thisRange, new SourceRange(0, 10)));
    assertFalse(SourceRangeUtils.covers(thisRange, new SourceRange(10, 10)));
    // covers
    assertTrue(SourceRangeUtils.covers(thisRange, new SourceRange(5, 10)));
    assertTrue(SourceRangeUtils.covers(thisRange, new SourceRange(6, 9)));
    assertTrue(SourceRangeUtils.covers(thisRange, new SourceRange(6, 8)));
  }

  /**
   * Test for {@link SourceRangeUtils#getEnd(SourceRange)}.
   */
  public void test_getEnd() throws Exception {
    assertEquals(8, SourceRangeUtils.getEnd(new SourceRange(5, 3)));
  }

  /**
   * Test for {@link SourceRangeUtils#getExpanded(SourceRange, int)}.
   */
  public void test_getExpanded() throws Exception {
    assertEquals(new SourceRange(5, 3), SourceRangeUtils.getExpanded(new SourceRange(5, 3), 0));
    assertEquals(new SourceRange(3, 7), SourceRangeUtils.getExpanded(new SourceRange(5, 3), 2));
    assertEquals(new SourceRange(6, 1), SourceRangeUtils.getExpanded(new SourceRange(5, 3), -1));
  }

  /**
   * Test for {@link SourceRangeUtils#intersects(SourceRange, SourceRange)}
   */
  public void test_intersects() throws Exception {
    SourceRange a = new SourceRange(5, 3);
    // ends before
    assertFalse(SourceRangeUtils.intersects(a, new SourceRange(0, 5)));
    // begins after
    assertFalse(SourceRangeUtils.intersects(a, new SourceRange(8, 5)));
    // begins on same offset
    assertTrue(SourceRangeUtils.intersects(a, new SourceRange(5, 1)));
    // begins inside, ends inside
    assertTrue(SourceRangeUtils.intersects(a, new SourceRange(6, 1)));
    // begins inside, ends after
    assertTrue(SourceRangeUtils.intersects(a, new SourceRange(6, 10)));
    // begins before, ends after
    assertTrue(SourceRangeUtils.intersects(a, new SourceRange(0, 10)));
  }
}