gecko/gfx/tests/gtest/TestRect.cpp
2013-08-13 14:48:17 -04:00

430 lines
14 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gtest/gtest.h"
#include "nsRect.h"
#include "gfxRect.h"
#ifdef XP_WIN
#include <windows.h>
#endif
template <class RectType>
static bool
TestConstructors()
{
// Create a rectangle
RectType rect1(10, 20, 30, 40);
// Make sure the rectangle was properly initialized
EXPECT_TRUE(rect1.x == 10 && rect1.y == 20 &&
rect1.width == 30 && rect1.height == 40) <<
"[1] Make sure the rectangle was properly initialized with constructor";
// Create a second rect using the copy constructor
RectType rect2(rect1);
// Make sure the rectangle was properly initialized
EXPECT_TRUE(rect2.x == rect1.x && rect2.y == rect2.y &&
rect2.width == rect2.width && rect2.height == rect2.height) <<
"[2] Make sure the rectangle was properly initialized with copy constructor";
EXPECT_TRUE(!rect1.IsEmpty() && rect1.IsFinite() &&
!rect2.IsEmpty() && rect2.IsFinite()) <<
"[3] These rectangles are not empty and are finite";
return true;
}
template <class RectType>
static bool
TestEqualityOperator()
{
RectType rect1(10, 20, 30, 40);
RectType rect2(rect1);
// Test the equality operator
EXPECT_TRUE(rect1 == rect2) <<
"[1] Test the equality operator";
EXPECT_FALSE(!rect1.IsEqualInterior(rect2)) <<
"[2] Test the inequality operator";
// Make sure that two empty rects are equal
rect1.SetEmpty();
rect2.SetEmpty();
EXPECT_TRUE(rect1 == rect2) <<
"[3] Make sure that two empty rects are equal";
return true;
}
template <class RectType>
static bool
TestContainment()
{
RectType rect1(10, 10, 50, 50);
// Test the point containment methods
//
// Basic test of a point in the middle of the rect
EXPECT_FALSE(!rect1.Contains(rect1.x + rect1.width/2, rect1.y + rect1.height/2)) <<
"[1] Basic test of a point in the middle of the rect";
// Test against a point at the left/top edges
EXPECT_FALSE(!rect1.Contains(rect1.x, rect1.y)) <<
"[2] Test against a point at the left/top edges";
// Test against a point at the right/bottom extents
EXPECT_FALSE(rect1.Contains(rect1.XMost(), rect1.YMost())) <<
"[3] Test against a point at the right/bottom extents";
// Test the rect containment methods
//
RectType rect2(rect1);
// Test against a rect that's the same as rect1
EXPECT_FALSE(!rect1.Contains(rect2)) <<
"[4] Test against a rect that's the same as rect1";
// Test against a rect whose left edge (only) is outside of rect1
rect2.x--;
EXPECT_FALSE(rect1.Contains(rect2)) <<
"[5] Test against a rect whose left edge (only) is outside of rect1";
rect2.x++;
// Test against a rect whose top edge (only) is outside of rect1
rect2.y--;
EXPECT_FALSE(rect1.Contains(rect2)) <<
"[6] Test against a rect whose top edge (only) is outside of rect1";
rect2.y++;
// Test against a rect whose right edge (only) is outside of rect1
rect2.x++;
EXPECT_FALSE(rect1.Contains(rect2)) <<
"[7] Test against a rect whose right edge (only) is outside of rect1";
rect2.x--;
// Test against a rect whose bottom edge (only) is outside of rect1
rect2.y++;
EXPECT_FALSE(rect1.Contains(rect2)) <<
"[8] Test against a rect whose bottom edge (only) is outside of rect1";
rect2.y--;
return true;
}
// Test the method that returns a boolean result but doesn't return a
// a rectangle
template <class RectType>
static bool
TestIntersects()
{
RectType rect1(10, 10, 50, 50);
RectType rect2(rect1);
// Test against a rect that's the same as rect1
EXPECT_FALSE(!rect1.Intersects(rect2)) <<
"[1] Test against a rect that's the same as rect1";
// Test against a rect that's enclosed by rect1
rect2.Inflate(-1, -1);
EXPECT_FALSE(!rect1.Contains(rect2) || !rect1.Intersects(rect2)) <<
"[2] Test against a rect that's enclosed by rect1";
rect2.Inflate(1, 1);
// Make sure inflate and deflate worked correctly
EXPECT_TRUE(rect1.IsEqualInterior(rect2)) <<
"[3] Make sure inflate and deflate worked correctly";
// Test against a rect that overlaps the left edge of rect1
rect2.x--;
EXPECT_FALSE(!rect1.Intersects(rect2)) <<
"[4] Test against a rect that overlaps the left edge of rect1";
rect2.x++;
// Test against a rect that's outside of rect1 on the left
rect2.x -= rect2.width;
EXPECT_FALSE(rect1.Intersects(rect2)) <<
"[5] Test against a rect that's outside of rect1 on the left";
rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
EXPECT_FALSE(!rect1.Intersects(rect2)) <<
"[6] Test against a rect that overlaps the top edge of rect1";
rect2.y++;
// Test against a rect that's outside of rect1 on the top
rect2.y -= rect2.height;
EXPECT_FALSE(rect1.Intersects(rect2)) <<
"[7] Test against a rect that's outside of rect1 on the top";
rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
EXPECT_FALSE(!rect1.Intersects(rect2)) <<
"[8] Test against a rect that overlaps the right edge of rect1";
rect2.x--;
// Test against a rect that's outside of rect1 on the right
rect2.x += rect2.width;
EXPECT_FALSE(rect1.Intersects(rect2)) <<
"[9] Test against a rect that's outside of rect1 on the right";
rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
EXPECT_FALSE(!rect1.Intersects(rect2)) <<
"[10] Test against a rect that overlaps the bottom edge of rect1";
rect2.y--;
// Test against a rect that's outside of rect1 on the bottom
rect2.y += rect2.height;
EXPECT_FALSE(rect1.Intersects(rect2)) <<
"[11] Test against a rect that's outside of rect1 on the bottom";
rect2.y -= rect2.height;
return true;
}
// Test the method that returns a boolean result and an intersection rect
template <class RectType>
static bool
TestIntersection()
{
RectType rect1(10, 10, 50, 50);
RectType rect2(rect1);
RectType dest;
// Test against a rect that's the same as rect1
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) || !(dest.IsEqualInterior(rect1))) <<
"[1] Test against a rect that's the same as rect1";
// Test against a rect that's enclosed by rect1
rect2.Inflate(-1, -1);
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) || !(dest.IsEqualInterior(rect2))) <<
"[2] Test against a rect that's enclosed by rect1";
rect2.Inflate(1, 1);
// Test against a rect that overlaps the left edge of rect1
rect2.x--;
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) ||
!(dest.IsEqualInterior(RectType(rect1.x, rect1.y, rect1.width - 1, rect1.height)))) <<
"[3] Test against a rect that overlaps the left edge of rect1";
rect2.x++;
// Test against a rect that's outside of rect1 on the left
rect2.x -= rect2.width;
EXPECT_FALSE(dest.IntersectRect(rect1, rect2)) <<
"[4] Test against a rect that's outside of rect1 on the left";
// Make sure an empty rect is returned
EXPECT_FALSE(!dest.IsEmpty()) <<
"[4] Make sure an empty rect is returned";
EXPECT_TRUE(dest.IsFinite()) << "[4b] Should be finite";
rect2.x += rect2.width;
// Test against a rect that overlaps the top edge of rect1
rect2.y--;
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) ||
!(dest.IsEqualInterior(RectType(rect1.x, rect1.y, rect1.width, rect1.height - 1)))) <<
"[5] Test against a rect that overlaps the top edge of rect1";
EXPECT_TRUE(dest.IsFinite()) << "[5b] Should be finite";
rect2.y++;
// Test against a rect that's outside of rect1 on the top
rect2.y -= rect2.height;
EXPECT_FALSE(dest.IntersectRect(rect1, rect2)) <<
"[6] Test against a rect that's outside of rect1 on the top";
// Make sure an empty rect is returned
EXPECT_FALSE(!dest.IsEmpty()) <<
"[6] Make sure an empty rect is returned";
EXPECT_TRUE(dest.IsFinite()) << "[6b] Should be finite";
rect2.y += rect2.height;
// Test against a rect that overlaps the right edge of rect1
rect2.x++;
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) ||
!(dest.IsEqualInterior(RectType(rect1.x + 1, rect1.y, rect1.width - 1, rect1.height)))) <<
"[7] Test against a rect that overlaps the right edge of rect1";
rect2.x--;
// Test against a rect that's outside of rect1 on the right
rect2.x += rect2.width;
EXPECT_FALSE(dest.IntersectRect(rect1, rect2)) <<
"[8] Test against a rect that's outside of rect1 on the right";
// Make sure an empty rect is returned
EXPECT_FALSE(!dest.IsEmpty()) <<
"[8] Make sure an empty rect is returned";
EXPECT_TRUE(dest.IsFinite()) << "[8b] Should be finite";
rect2.x -= rect2.width;
// Test against a rect that overlaps the bottom edge of rect1
rect2.y++;
EXPECT_FALSE(!dest.IntersectRect(rect1, rect2) ||
!(dest.IsEqualInterior(RectType(rect1.x, rect1.y + 1, rect1.width, rect1.height - 1)))) <<
"[9] Test against a rect that overlaps the bottom edge of rect1";
EXPECT_TRUE(dest.IsFinite()) << "[9b] Should be finite";
rect2.y--;
// Test against a rect that's outside of rect1 on the bottom
rect2.y += rect2.height;
EXPECT_FALSE(dest.IntersectRect(rect1, rect2)) <<
"[10] Test against a rect that's outside of rect1 on the bottom";
// Make sure an empty rect is returned
EXPECT_FALSE(!dest.IsEmpty()) <<
"[10] Make sure an empty rect is returned";
EXPECT_TRUE(dest.IsFinite()) << "[10b] Should be finite";
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);
EXPECT_FALSE(dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) <<
"[11] Intersection of rects with zero width or height should be empty";
EXPECT_TRUE(dest.IsFinite()) << "[11b] Should be finite";
// 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);
EXPECT_FALSE(dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) <<
"[12] Intersection of rects with negative width or height should be empty";
EXPECT_TRUE(dest.IsFinite()) << "[12b] Should be finite";
// 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);
EXPECT_FALSE(dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) <<
"[13] Intersection of rects with negative width or height should be empty";
EXPECT_TRUE(dest.IsFinite()) << "[13b] Should be finite";
// Test against two identical rects with negative height
rect1.SetRect(100, 100, 100, -100);
rect2.SetRect(100, 100, 100, -100);
EXPECT_FALSE(dest.IntersectRect(rect1, rect2) || !dest.IsEmpty()) <<
"[14] Intersection of rects with negative width or height should be empty";
EXPECT_TRUE(dest.IsFinite()) << "[14b] Should be finite";
return true;
}
template <class RectType>
static bool
TestUnion()
{
RectType rect1;
RectType rect2(10, 10, 50, 50);
RectType dest;
// Check the case where the receiver is an empty rect
rect1.SetEmpty();
dest.UnionRect(rect1, rect2);
EXPECT_FALSE(dest.IsEmpty() || !dest.IsEqualInterior(rect2)) <<
"[1] Check the case where the receiver is an empty rect";
EXPECT_TRUE(dest.IsFinite()) << "[1b] Should be finite";
// Check the case where the source rect is an empty rect
rect1 = rect2;
rect2.SetEmpty();
dest.UnionRect(rect1, rect2);
EXPECT_FALSE(dest.IsEmpty() || !dest.IsEqualInterior(rect1)) <<
"[2] Check the case where the source rect is an empty rect";
EXPECT_TRUE(dest.IsFinite()) << "[2b] Should be finite";
// Test the case where both rects are empty
rect1.SetEmpty();
rect2.SetEmpty();
dest.UnionRect(rect1, rect2);
EXPECT_FALSE(!dest.IsEmpty()) <<
"[3] Test the case where both rects are empty";
EXPECT_TRUE(dest.IsFinite()) << "[3b] Should be finite";
// Test union case where the two rects don't overlap at all
rect1.SetRect(10, 10, 50, 50);
rect2.SetRect(100, 100, 50, 50);
dest.UnionRect(rect1, rect2);
EXPECT_FALSE(dest.IsEmpty() ||
!(dest.IsEqualInterior(RectType(rect1.x, rect1.y, rect2.XMost() - rect1.x, rect2.YMost() - rect1.y)))) <<
"[4] Test union case where the two rects don't overlap at all";
EXPECT_TRUE(dest.IsFinite()) << "[4b] Should be finite";
// Test union case where the two rects overlap
rect1.SetRect(30, 30, 50, 50);
rect2.SetRect(10, 10, 50, 50);
dest.UnionRect(rect1, rect2);
EXPECT_FALSE(dest.IsEmpty() ||
!(dest.IsEqualInterior(RectType(rect2.x, rect2.y, rect1.XMost() - rect2.x, rect1.YMost() - rect2.y)))) <<
"[5] Test union case where the two rects overlap";
EXPECT_TRUE(dest.IsFinite()) << "[5b] Should be finite";
return true;
}
static bool
TestFiniteGfx()
{
// Doesn't appear that __builtin_inf() and __builtin_nan() are available on
// all compilers, so go the old fashioned way for inf and nan.
float posInf = 1.0/0.0;
float negInf = -1.0/0.0;
float justNaN = 0.0/0.0;
gfxFloat values[4] = {5.0, 10.0, 15.0, 20.0};
// Try the "non-finite" values for x, y, width, height, one at a time
for (int i=0; i<4; i+=1) {
values[i] = posInf;
gfxRect rectPosInf(values[0], values[1], values[2], values[3]);
EXPECT_FALSE(rectPosInf.IsFinite()) << "For +inf (" << values[0] << "," << values[1] << "," << values[2] << "," << values[3] << ")";
values[i] = negInf;
gfxRect rectNegInf(values[0], values[1], values[2], values[3]);
EXPECT_FALSE(rectNegInf.IsFinite()) << "For -inf (" << values[0] << "," << values[1] << "," << values[2] << "," << values[3] << ")";
values[i] = justNaN;
gfxRect rectNaN(values[0], values[1], values[2], values[3]);
EXPECT_FALSE(rectNaN.IsFinite()) << "For NaN (" << values[0] << "," << values[1] << "," << values[2] << "," << values[3] << ")";
// Reset to a finite value...
values[i] = 5.0*i;
}
return true;
}
TEST(Gfx, nsRect) {
TestConstructors<nsRect>();
TestEqualityOperator<nsRect>();
TestContainment<nsRect>();
TestIntersects<nsRect>();
TestIntersection<nsRect>();
TestUnion<nsRect>();
}
TEST(Gfx, nsIntRect) {
TestConstructors<nsIntRect>();
TestEqualityOperator<nsIntRect>();
TestContainment<nsIntRect>();
TestIntersects<nsIntRect>();
TestIntersection<nsIntRect>();
TestUnion<nsIntRect>();
}
TEST(Gfx, gfxRect) {
TestConstructors<gfxRect>();
// Skip TestEqualityOperator<gfxRect>(); as gfxRect::operator== is private
TestContainment<gfxRect>();
TestIntersects<gfxRect>();
TestIntersection<gfxRect>();
TestUnion<gfxRect>();
TestFiniteGfx();
}