gecko-dev/gfx/tests/TestRect.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#include "nsRect.h"
#include <stdio.h>
#ifdef XP_WIN
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#include <windows.h>
#endif
static PRBool
TestConstructors()
{
// Create a rectangle
nsRect rect1(10, 20, 30, 40);
// Make sure the rectangle was properly initialized
if ((rect1.x != 10) || (rect1.y != 20) ||
(rect1.width != 30) || (rect1.height != 40)) {
printf("rect initialization failed!\n");
return PR_FALSE;
}
// Create a second rect using the copy constructor
nsRect rect2(rect1);
// Make sure the rectangle was properly initialized
if ((rect2.x != rect1.x) || (rect2.y != rect1.y) ||
(rect2.width != rect1.width) || (rect2.height != rect1.height)) {
printf("rect copy constructor failed!\n");
return PR_FALSE;
}
return PR_TRUE;
}
static PRBool
TestEqualityOperator()
{
nsRect rect1(10, 20, 30, 40);
nsRect rect2(rect1);
// Test the equality operator
if (!(rect1 == rect2)) {
printf("rect equality operator failed!\n");
return PR_FALSE;
}
// Test the inequality operator
if (rect1 != rect2) {
printf("rect inequality operator failed!\n");
return PR_FALSE;
}
// Make sure that two empty rects are equal
rect1.Empty();
rect2.Empty();
if (!(rect1 == rect2)) {
printf("rect equality operator failed for empty rects!\n");
return PR_FALSE;
}
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return PR_TRUE;
}
static PRBool
TestContainment()
{
nsRect rect1(10, 10, 50, 50);
// Test the point containment methods
//
// Basic test of a point in the middle of the rect
if (!rect1.Contains(rect1.x + rect1.width/2, rect1.y + rect1.height/2)) {
printf("point containment test #1 failed!\n");
return PR_FALSE;
}
// Test against a point at the left/top edges
if (!rect1.Contains(rect1.x, rect1.y)) {
printf("point containment test #2 failed!\n");
return PR_FALSE;
}
// Test against a point at the right/bottom extents
if (rect1.Contains(rect1.XMost(), rect1.YMost())) {
printf("point containment test #3 failed!\n");
return PR_FALSE;
}
// Test the rect containment methods
//
nsRect rect2(rect1);
// Test against a rect that's the same as rect1
if (!rect1.Contains(rect2)) {
printf("rect containment test #1 failed!\n");
return PR_FALSE;
}
// Test against a rect whose left edge (only) is outside of rect1
rect2.x--;
if (rect1.Contains(rect2)) {
printf("rect containment test #2 failed!\n");
return PR_FALSE;
}
rect2.x++;
// Test against a rect whose top edge (only) is outside of rect1
rect2.y--;
if (rect1.Contains(rect2)) {
printf("rect containment test #3 failed!\n");
return PR_FALSE;
}
rect2.y++;
// Test against a rect whose right edge (only) is outside of rect1
rect2.x++;
if (rect1.Contains(rect2)) {
printf("rect containment test #2 failed!\n");
return PR_FALSE;
}
rect2.x--;
// Test against a rect whose bottom edge (only) is outside of rect1
rect2.y++;
if (rect1.Contains(rect2)) {
printf("rect containment test #3 failed!\n");
return PR_FALSE;
}
rect2.y--;
return PR_TRUE;
}
// Test the method that returns a boolean result but doesn't return a
// a rectangle
static PRBool
TestIntersects()
{
nsRect rect1(10, 10, 50, 50);
nsRect rect2(rect1);
// Test against a rect that's the same as rect1
if (!rect1.Intersects(rect2)) {
printf("rect intersects test #1 failed!\n");
return PR_FALSE;
}
// Test against a rect that's enclosed by rect1
rect2.Deflate(1, 1);
if (!rect1.Contains(rect2) || !rect1.Intersects(rect2)) {
printf("rect intersects test #2 failed!\n");
return PR_FALSE;
}
rect2.Inflate(1, 1);
// Make sure inflate and deflate worked correctly
if (rect1 != rect2) {
printf("rect inflate or deflate failed!\n");
return PR_FALSE;
}
// Test against a rect that overlaps the left edge of rect1
rect2.x--;
if (!rect1.Intersects(rect2)) {
printf("rect containment test #3 failed!\n");
return PR_FALSE;
}
rect2.x++;
// Test against a rect that's outside of rect1 on the left
rect2.x -= rect2.width;
if (rect1.Intersects(rect2)) {
printf("rect containment test #4 failed!\n");
return PR_FALSE;
}
rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
if (!rect1.Intersects(rect2)) {
printf("rect containment test #5 failed!\n");
return PR_FALSE;
}
rect2.y++;
// Test against a rect that's outside of rect1 on the top
rect2.y -= rect2.height;
if (rect1.Intersects(rect2)) {
printf("rect containment test #6 failed!\n");
return PR_FALSE;
}
rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
if (!rect1.Intersects(rect2)) {
printf("rect containment test #7 failed!\n");
return PR_FALSE;
}
rect2.x--;
// Test against a rect that's outside of rect1 on the right
rect2.x += rect2.width;
if (rect1.Intersects(rect2)) {
printf("rect containment test #8 failed!\n");
return PR_FALSE;
}
rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
if (!rect1.Intersects(rect2)) {
printf("rect containment test #9 failed!\n");
return PR_FALSE;
}
rect2.y--;
// Test against a rect that's outside of rect1 on the bottom
rect2.y += rect2.height;
if (rect1.Intersects(rect2)) {
printf("rect containment test #10 failed!\n");
return PR_FALSE;
}
rect2.y -= rect2.height;
return PR_TRUE;
}
// Test the method that returns a boolean result and an intersection rect
static PRBool
TestIntersection()
{
nsRect rect1(10, 10, 50, 50);
nsRect rect2(rect1);
nsRect dest;
// Test against a rect that's the same as rect1
if (!dest.IntersectRect(rect1, rect2) || (dest != rect1)) {
printf("rect intersection test #1 failed!\n");
return PR_FALSE;
}
// Test against a rect that's enclosed by rect1
rect2.Deflate(1, 1);
if (!dest.IntersectRect(rect1, rect2) || (dest != rect2)) {
printf("rect intersection test #2 failed!\n");
return PR_FALSE;
}
rect2.Inflate(1, 1);
// Test against a rect that overlaps the left edge of rect1
rect2.x--;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != nsRect(rect1.x, rect1.y, rect1.width - 1, rect1.height))) {
printf("rect intersection test #3 failed!\n");
return PR_FALSE;
}
rect2.x++;
// Test against a rect that's outside of rect1 on the left
rect2.x -= rect2.width;
if (dest.IntersectRect(rect1, rect2)) {
printf("rect intersection test #4 failed!\n");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
printf("rect intersection test #4 no empty rect!\n");
return PR_FALSE;
}
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rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != nsRect(rect1.x, rect1.y, rect1.width, rect1.height - 1))) {
printf("rect intersection test #5 failed!\n");
return PR_FALSE;
}
rect2.y++;
// Test against a rect that's outside of rect1 on the top
rect2.y -= rect2.height;
if (dest.IntersectRect(rect1, rect2)) {
printf("rect intersection test #6 failed!\n");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
printf("rect intersection test #6 no empty rect!\n");
return PR_FALSE;
}
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rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != nsRect(rect1.x + 1, rect1.y, rect1.width - 1, rect1.height))) {
printf("rect intersection test #7 failed!\n");
return PR_FALSE;
}
rect2.x--;
// Test against a rect that's outside of rect1 on the right
rect2.x += rect2.width;
if (dest.IntersectRect(rect1, rect2)) {
printf("rect intersection test #8 failed!\n");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
printf("rect intersection test #8 no empty rect!\n");
return PR_FALSE;
}
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rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != nsRect(rect1.x, rect1.y + 1, rect1.width, rect1.height - 1))) {
printf("rect intersection test #9 failed!\n");
return PR_FALSE;
}
rect2.y--;
// Test against a rect that's outside of rect1 on the bottom
rect2.y += rect2.height;
if (dest.IntersectRect(rect1, rect2)) {
printf("rect intersection test #10 failed!\n");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
printf("rect intersection test #10 no empty rect!\n");
return PR_FALSE;
}
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rect2.y -= rect2.height;
return PR_TRUE;
}
static PRBool
TestUnion()
{
nsRect rect1;
nsRect rect2(10, 10, 50, 50);
nsRect dest;
// Check the case where the receiver is an empty rect
rect1.Empty();
if (!dest.UnionRect(rect1, rect2) || (dest != rect2)) {
printf("rect union test #1 failed!\n");
return PR_FALSE;
}
// Check the case where the source rect is an empty rect
rect1 = rect2;
rect2.Empty();
if (!dest.UnionRect(rect1, rect2) || (dest != rect1)) {
printf("rect union test #2 failed!\n");
return PR_FALSE;
}
// Test the case where both rects are empty. This should fail
rect1.Empty();
rect2.Empty();
if (dest.UnionRect(rect1, rect2)) {
printf("rect union test #3 failed!\n");
return PR_FALSE;
}
// Test union case where the two rects don't overlap at all
rect1.SetRect(10, 10, 50, 50);
rect2.SetRect(100, 100, 50, 50);
if (!dest.UnionRect(rect1, rect2) ||
(dest != nsRect(rect1.x, rect1.y, rect2.XMost() - rect1.x, rect2.YMost() - rect1.y))) {
printf("rect union test #4 failed!\n");
return PR_FALSE;
}
// Test union case where the two rects overlap
rect1.SetRect(30, 30, 50, 50);
rect2.SetRect(10, 10, 50, 50);
if (!dest.UnionRect(rect1, rect2) ||
(dest != nsRect(rect2.x, rect2.y, rect1.XMost() - rect2.x, rect1.YMost() - rect2.y))) {
printf("rect union test #5 failed!\n");
return PR_FALSE;
}
return PR_TRUE;
}
int main(int argc, char** argv)
{
if (!TestConstructors())
return -1;
if (!TestEqualityOperator())
return -1;
if (!TestContainment())
return -1;
if (!TestIntersects())
return -1;
if (!TestIntersection())
return -1;
if (!TestUnion())
return -1;
return 0;
}