• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56
• 57
• 58
• 59
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 76
• 77
• 78
• 79
• 80
• 81
• 82
• 83
• 84
• 85
• 86
• 87
• 88
• 89
• 90
• 91
• 92
• 93
• 94
• 95
• 96
• 97
• 98
• 99
• 100
• 101
• 102
• 103
• 104
• 105
• 106
• 107
• 108
• 109
• 110
• 111
• 112
• 113
• 114
• 115
• 116
• 117
• 118
• 119
• 120
• 121
• 122
• 123
• 124
• 125
• 126
• 127
• 128
• 129
• 130
• 131
• 132
• 133
• 134
• 135
• 136
• 137
• 138
• 139
• 140
• 141
• 142
• 143
• 144
• 145
• 146
• 147
• 148
• 149
• 150
• 151
• 152
• 153
• 154
• 155
• 156
• 157
• 158
• 159
• 160
• 161
• 162
• 163
• 164
• 165
• 166
• 167
• 168
• 169
• 170
• 171
• 172
• 173
• 174

import { Rectangle } from '@pixi/math';

import '@pixi/math-extras';

describe('Rectangle', () =>
{
    describe('containsRect', () =>
    {
        it('should return true if all four corners are inside or on the edge of the rectangle', () =>
        {
            /*
                +-----------------+-----------------+
                |   A             |   B             |
                |    +------+     |                 |
                |    |  C   |     |                 |
                |    |      |     |       🄳         |
                |    |      |     |                 |
                |    +------+     |                 |
                |                 |                 |
                +-----------------+-----------------+
            */
            const a = new Rectangle(0, 0, 100, 100);
            const b = new Rectangle(100, 0, 100, 100);
            const c = new Rectangle(25, 25, 50, 50);
            const d = new Rectangle(150, 50, 0, 0);

            // a contains c
            expect(a.containsRect(c)).toEqual(true);
            // but c doesn't contain a
            expect(c.containsRect(a)).toEqual(false);

            // b doesn't contain c
            expect(a.containsRect(b)).toEqual(false);

            // B contains D. An empty rectangle **CAN** be contained
            expect(b.containsRect(d)).toEqual(true);

            // Any rectangle with area contains itself
            expect(a.containsRect(a.clone())).toEqual(true);
            expect(b.containsRect(b.clone())).toEqual(true);
            expect(c.containsRect(c.clone())).toEqual(true);

            // An empty rectangle can't contain anything, thus it can't contain itself
            expect(d.containsRect(d.clone())).toEqual(false);
        });
    });

    describe('equals', () =>
    {
        it('should return true x, y, width and height match', () =>
        {
            const a = new Rectangle(0, 0, 100, 100);
            const b = new Rectangle(0, 0, 100, 100);
            const c = new Rectangle(50, 50, 100, 100);

            // a is equal to b
            expect(a.equals(b)).toEqual(true);
            // thus b is equal to a
            expect(b.equals(a)).toEqual(true);

            // c is not equal to a
            expect(a.equals(c)).toEqual(false);

            // any point is equal to themselves
            expect(a.equals(a.clone())).toEqual(true);
            expect(b.equals(b.clone())).toEqual(true);
            expect(c.equals(c.clone())).toEqual(true);
        });
    });
    describe('intersection', () =>
    {
        it('should return a rectangle with the intersection if the area is > 0, otherwise an empty rectangle',
            () =>
            {
                /*
                +--------+
                |   A    |
                |   +---+---+
                |   | 🄴 | B |
                +---|---+---|-----+
                    |   |   |     |
                    +---+---+ C   |
                        |         |
                        +---------+
                */
                const a = new Rectangle(0, 0, 100, 100);
                const b = new Rectangle(50, 50, 100, 100);
                const c = new Rectangle(100, 100, 100, 100);
                const empty = new Rectangle(75, 75, 0, 0);
                const d = a.intersection(b);
                const e = a.intersection(c);
                const emptyIntersects = empty.intersection(b);
                const intersectingEmpty = b.intersection(empty);
                const emptyIntersectsItself = empty.intersection(empty);

                expect(d.x).toEqual(50);
                expect(d.y).toEqual(50);
                expect(d.width).toEqual(50);
                expect(d.height).toEqual(50);

                expect(e.x).toEqual(0);
                expect(e.y).toEqual(0);
                expect(e.width).toEqual(0);
                expect(e.height).toEqual(0);

                // empty rectangles can't intersect or be intersected
                expect(emptyIntersects.x).toEqual(0);
                expect(emptyIntersects.y).toEqual(0);
                expect(emptyIntersects.width).toEqual(0);
                expect(emptyIntersects.height).toEqual(0);

                expect(intersectingEmpty.x).toEqual(0);
                expect(intersectingEmpty.y).toEqual(0);
                expect(intersectingEmpty.width).toEqual(0);
                expect(intersectingEmpty.height).toEqual(0);

                expect(emptyIntersectsItself.x).toEqual(0);
                expect(emptyIntersectsItself.y).toEqual(0);
                expect(emptyIntersectsItself.width).toEqual(0);
                expect(emptyIntersectsItself.height).toEqual(0);
            });

        it('should return the same reference given', () =>
        {
            const a = new Rectangle(0, 0, 100, 100);
            const b = new Rectangle(50, 50, 100, 100);
            const c = a.intersection(b, a);

            expect(c).toEqual(a);
        });
    });

    describe('union', () =>
    {
        it('should return a rectangle that includes both rectangles (similar to enlarge)',
            () =>
            {
                const a = new Rectangle(0, 0, 100, 100);
                const b = new Rectangle(50, 50, 100, 100);
                const c = a.union(b);

                expect(c.x).toEqual(0);
                expect(c.y).toEqual(0);
                expect(c.width).toEqual(150);
                expect(c.height).toEqual(150);
            });

        it('should return the same reference given', () =>
        {
            const a = new Rectangle(0, 0, 100, 100);
            const b = new Rectangle(50, 50, 100, 100);
            const c = a.union(b, a);

            expect(c).toEqual(a);
        });

        it('should return the same values as enalrge()',
            () =>
            {
                const enlarged = new Rectangle(0, 0, 100, 100);
                const a = new Rectangle(0, 0, 100, 100);
                const b = new Rectangle(50, 50, 100, 100);
                const c = a.union(b);

                enlarged.enlarge(b);

                expect(c.x).toEqual(enlarged.x);
                expect(c.y).toEqual(enlarged.y);
                expect(c.width).toEqual(enlarged.width);
                expect(c.height).toEqual(enlarged.height);
            });
    });
});