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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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/org/documents/epl-v10.php
*
* 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.android.ide.eclipse.adt.internal.editors.layout.gle2;
import org.eclipse.swt.graphics.Rectangle;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import junit.framework.TestCase;
public class IncludeOverlayTest extends TestCase {
public void testSubtractRectangles() throws Exception {
checkSubtract(new Rectangle(0, 0, 100, 80), Collections.<Rectangle> emptyList());
checkSubtract(new Rectangle(0, 0, 100, 80), Arrays.asList(new Rectangle(50, 50, 20, 20)));
checkSubtract(new Rectangle(0, 0, 100, 80), Arrays.asList(new Rectangle(50, 50, 20, 20),
new Rectangle(90, 90, 10, 10)));
checkSubtract(new Rectangle(0, 0, 100, 80), Arrays.asList(new Rectangle(50, 50, 20, 20),
new Rectangle(90, 90, 10, 10), new Rectangle(0, 0, 10, 10)));
}
private void checkSubtract(Rectangle rectangle, List<Rectangle> holes) {
Collection<Rectangle> result = IncludeOverlay.subtractRectangles(rectangle, holes);
// Do some Monte Carlo testing - pick random coordinates and check that if they
// are within one of the holes then they are not in the result list and vice versa
Random random = new Random(42L);
for (int i = 0; i < 1000; i++) {
int x = random.nextInt(rectangle.width);
int y = random.nextInt(rectangle.height);
boolean inHole = false;
for (Rectangle hole : holes) {
if (hole.contains(x, y)) {
inHole = true;
}
}
boolean inResult = false;
for (Rectangle r : result) {
if (r.contains(x, y)) {
inResult = true;
break;
}
}
if (inHole == inResult) {
fail("Wrong result at (" + x + "," + y + ") for rectangle=" + rectangle
+ " and holes=" + holes + " where inHole=inResult="
+ inResult);
}
}
}
}
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