gecko-dev/gfx/tests/TestRect.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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
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*
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
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*
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* 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
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#include "TestHarness.h"
#include "nsRect.h"
#ifdef XP_WIN
#include <windows.h>
#endif
template <class RectType>
static PRBool
TestConstructors()
{
// Create a rectangle
RectType 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)) {
fail("[1] Make sure the rectangle was properly initialized with constructor");
return PR_FALSE;
}
// Create a second rect using the copy constructor
RectType 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)) {
fail("[2] Make sure the rectangle was properly initialized with copy constructor");
return PR_FALSE;
}
passed("TestConstructors");
return PR_TRUE;
}
template <class RectType>
static PRBool
TestEqualityOperator()
{
RectType rect1(10, 20, 30, 40);
RectType rect2(rect1);
// Test the equality operator
if (!(rect1 == rect2)) {
fail("[1] Test the equality operator");
return PR_FALSE;
}
// Test the inequality operator
if (rect1 != rect2) {
fail("[2] Test the inequality operator");
return PR_FALSE;
}
// Make sure that two empty rects are equal
rect1.Empty();
rect2.Empty();
if (!(rect1 == rect2)) {
fail("[3] Make sure that two empty rects are equal");
return PR_FALSE;
}
passed("TestEqualityOperator");
return PR_TRUE;
}
template <class RectType>
static PRBool
TestContainment()
{
RectType 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)) {
fail("[1] Basic test of a point in the middle of the rect");
return PR_FALSE;
}
// Test against a point at the left/top edges
if (!rect1.Contains(rect1.x, rect1.y)) {
fail("[2] Test against a point at the left/top edges");
return PR_FALSE;
}
// Test against a point at the right/bottom extents
if (rect1.Contains(rect1.XMost(), rect1.YMost())) {
fail("[3] Test against a point at the right/bottom extents");
return PR_FALSE;
}
// Test the rect containment methods
//
RectType rect2(rect1);
// Test against a rect that's the same as rect1
if (!rect1.Contains(rect2)) {
fail("[4] Test against a rect that's the same as rect1");
return PR_FALSE;
}
// Test against a rect whose left edge (only) is outside of rect1
rect2.x--;
if (rect1.Contains(rect2)) {
fail("[5] Test against a rect whose left edge (only) is outside of rect1");
return PR_FALSE;
}
rect2.x++;
// Test against a rect whose top edge (only) is outside of rect1
rect2.y--;
if (rect1.Contains(rect2)) {
fail("[6] Test against a rect whose top edge (only) is outside of rect1");
return PR_FALSE;
}
rect2.y++;
// Test against a rect whose right edge (only) is outside of rect1
rect2.x++;
if (rect1.Contains(rect2)) {
fail("[7] Test against a rect whose right edge (only) is outside of rect1");
return PR_FALSE;
}
rect2.x--;
// Test against a rect whose bottom edge (only) is outside of rect1
rect2.y++;
if (rect1.Contains(rect2)) {
fail("[8] Test against a rect whose bottom edge (only) is outside of rect1");
return PR_FALSE;
}
rect2.y--;
passed("TestContainment");
return PR_TRUE;
}
// Test the method that returns a boolean result but doesn't return a
// a rectangle
template <class RectType>
static PRBool
TestIntersects()
{
RectType rect1(10, 10, 50, 50);
RectType rect2(rect1);
// Test against a rect that's the same as rect1
if (!rect1.Intersects(rect2)) {
fail("[1] Test against a rect that's the same as rect1");
return PR_FALSE;
}
// Test against a rect that's enclosed by rect1
rect2.Inflate(-1, -1);
if (!rect1.Contains(rect2) || !rect1.Intersects(rect2)) {
fail("[2] Test against a rect that's enclosed by rect1");
return PR_FALSE;
}
rect2.Inflate(1, 1);
// Make sure inflate and deflate worked correctly
if (rect1 != rect2) {
fail("[3] Make sure inflate and deflate worked correctly");
return PR_FALSE;
}
// Test against a rect that overlaps the left edge of rect1
rect2.x--;
if (!rect1.Intersects(rect2)) {
fail("[4] Test against a rect that overlaps the left edge of rect1");
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)) {
fail("[5] Test against a rect that's outside of rect1 on the left");
return PR_FALSE;
}
rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
if (!rect1.Intersects(rect2)) {
fail("[6] Test against a rect that overlaps the top edge of rect1");
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)) {
fail("[7] Test against a rect that's outside of rect1 on the top");
return PR_FALSE;
}
rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
if (!rect1.Intersects(rect2)) {
fail("[8] Test against a rect that overlaps the right edge of rect1");
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)) {
fail("[9] Test against a rect that's outside of rect1 on the right");
return PR_FALSE;
}
rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
if (!rect1.Intersects(rect2)) {
fail("[10] Test against a rect that overlaps the bottom edge of rect1");
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)) {
fail("[11] Test against a rect that's outside of rect1 on the bottom");
return PR_FALSE;
}
rect2.y -= rect2.height;
passed("TestIntersects");
return PR_TRUE;
}
// Test the method that returns a boolean result and an intersection rect
template <class RectType>
static PRBool
TestIntersection()
{
RectType rect1(10, 10, 50, 50);
RectType rect2(rect1);
RectType dest;
// Test against a rect that's the same as rect1
if (!dest.IntersectRect(rect1, rect2) || (dest != rect1)) {
fail("[1] Test against a rect that's the same as rect1");
return PR_FALSE;
}
// Test against a rect that's enclosed by rect1
rect2.Inflate(-1, -1);
if (!dest.IntersectRect(rect1, rect2) || (dest != rect2)) {
fail("[2] Test against a rect that's enclosed by rect1");
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 != RectType(rect1.x, rect1.y, rect1.width - 1, rect1.height))) {
fail("[3] Test against a rect that overlaps the left edge of rect1");
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)) {
fail("[4] Test against a rect that's outside of rect1 on the left");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
fail("[4] Make sure an empty rect is returned");
return PR_FALSE;
}
rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != RectType(rect1.x, rect1.y, rect1.width, rect1.height - 1))) {
fail("[5] Test against a rect that overlaps the top edge of rect1");
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)) {
fail("[6] Test against a rect that's outside of rect1 on the top");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
fail("[6] Make sure an empty rect is returned");
return PR_FALSE;
}
rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != RectType(rect1.x + 1, rect1.y, rect1.width - 1, rect1.height))) {
fail("[7] Test against a rect that overlaps the right edge of rect1");
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)) {
fail("[8] Test against a rect that's outside of rect1 on the right");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
fail("[8] Make sure an empty rect is returned");
return PR_FALSE;
}
rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
if (!dest.IntersectRect(rect1, rect2) ||
(dest != RectType(rect1.x, rect1.y + 1, rect1.width, rect1.height - 1))) {
fail("[9] Test against a rect that overlaps the bottom edge of rect1");
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)) {
fail("[10] Test against a rect that's outside of rect1 on the bottom");
return PR_FALSE;
}
// Make sure an empty rect is returned
if (!dest.IsEmpty()) {
fail("[10] Make sure an empty rect is returned");
return PR_FALSE;
}
rect2.y -= rect2.height;
// Test against a rect with zero width or height
rect1.SetRect(100, 100, 100, 100);
rect2.SetRect(150, 100, 0, 100);
if (dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) {
fail("[11] Intersection of rects with zero width or height should be empty");
return PR_FALSE;
}
// Tests against a rect with negative width or height
//
// Test against a rect with negative width
rect1.SetRect(100, 100, 100, 100);
rect2.SetRect(100, 100, -100, 100);
if (dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) {
fail("[12] Intersection of rects with negative width or height should be empty");
return PR_FALSE;
}
// Those two rects exactly overlap in some way...
// but we still want to return an empty rect
rect1.SetRect(100, 100, 100, 100);
rect2.SetRect(200, 200, -100, -100);
if (dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) {
fail("[13] Intersection of rects with negative width or height should be empty");
return PR_FALSE;
}
// Test against two identical rects with negative height
rect1.SetRect(100, 100, 100, -100);
rect2.SetRect(100, 100, 100, -100);
if (dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) {
fail("[14] Intersection of rects with negative width or height should be empty");
return PR_FALSE;
}
passed("TestIntersection");
return PR_TRUE;
}
template <class RectType>
static PRBool
TestUnion()
{
RectType rect1;
RectType rect2(10, 10, 50, 50);
RectType dest;
// Check the case where the receiver is an empty rect
rect1.Empty();
if (!dest.UnionRect(rect1, rect2) || (dest != rect2)) {
fail("[1] Check the case where the receiver is an empty rect");
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)) {
fail("[2] Check the case where the source rect is an empty rect");
return PR_FALSE;
}
// Test the case where both rects are empty
rect1.Empty();
rect2.Empty();
if (dest.UnionRect(rect1, rect2)) {
fail("[3] Test the case where both rects are empty");
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 != RectType(rect1.x, rect1.y, rect2.XMost() - rect1.x, rect2.YMost() - rect1.y))) {
fail("[4] Test union case where the two rects don't overlap at all");
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 != RectType(rect2.x, rect2.y, rect1.XMost() - rect2.x, rect1.YMost() - rect2.y))) {
fail("[5] Test union case where the two rects overlap");
return PR_FALSE;
}
passed("TestUnion");
return PR_TRUE;
}
int main(int argc, char** argv)
{
ScopedXPCOM xpcom("TestRect");
if (xpcom.failed())
return -1;
int rv = 0;
//-----------------------
// Test nsRect
//
printf("===== nsRect tests =====\n");
if (!TestConstructors<nsRect>())
rv = -1;
if (!TestEqualityOperator<nsRect>())
rv = -1;
if (!TestContainment<nsRect>())
rv = -1;
if (!TestIntersects<nsRect>())
rv = -1;
if (!TestIntersection<nsRect>())
rv = -1;
if (!TestUnion<nsRect>())
rv = -1;
//-----------------------
// Test nsIntRect
//
printf("===== nsIntRect tests =====\n");
if (!TestConstructors<nsIntRect>())
rv = -1;
if (!TestEqualityOperator<nsIntRect>())
rv = -1;
if (!TestContainment<nsIntRect>())
rv = -1;
if (!TestIntersects<nsIntRect>())
rv = -1;
if (!TestIntersection<nsIntRect>())
rv = -1;
if (!TestUnion<nsIntRect>())
rv = -1;
return rv;
}