| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library rect_test; |
| |
| import 'dart:math'; |
| import 'package:unittest/unittest.dart'; |
| |
| main() { |
| Rectangle createRectangle(List<num> a) { |
| return a != null ? new Rectangle(a[0], a[1], a[2] - a[0], a[3] - a[1]) |
| : null; |
| } |
| |
| test('construction', () { |
| var r0 = new Rectangle(10, 20, 30, 40); |
| expect(r0.toString(), 'Rectangle (10, 20) 30 x 40'); |
| expect(r0.right, 40); |
| expect(r0.bottom, 60); |
| |
| var r1 = new Rectangle.fromPoints(r0.topLeft, r0.bottomRight); |
| expect(r1, r0); |
| |
| var r2 = new Rectangle.fromPoints(r0.bottomRight, r0.topLeft); |
| expect(r2, r0); |
| }); |
| |
| test('intersection', () { |
| var tests = [ |
| [[10, 10, 20, 20], [15, 15, 25, 25], [15, 15, 20, 20]], |
| [[10, 10, 20, 20], [20, 0, 30, 10], [20, 10, 20, 10]], |
| [[0, 0, 1, 1], [10, 11, 12, 13], null], |
| [[11, 12, 98, 99], [22, 23, 34, 35], [22, 23, 34, 35]]]; |
| |
| for (var test in tests) { |
| var r0 = createRectangle(test[0]); |
| var r1 = createRectangle(test[1]); |
| var expected = createRectangle(test[2]); |
| |
| expect(r0.intersection(r1), expected); |
| expect(r1.intersection(r0), expected); |
| } |
| }); |
| |
| test('intersects', () { |
| var r0 = new Rectangle(10, 10, 20, 20); |
| var r1 = new Rectangle(15, 15, 25, 25); |
| var r2 = new Rectangle(0, 0, 1, 1); |
| |
| expect(r0.intersects(r1), isTrue); |
| expect(r1.intersects(r0), isTrue); |
| |
| expect(r0.intersects(r2), isFalse); |
| expect(r2.intersects(r0), isFalse); |
| }); |
| |
| test('boundingBox', () { |
| var tests = [ |
| [[10, 10, 20, 20], [15, 15, 25, 25], [10, 10, 25, 25]], |
| [[10, 10, 20, 20], [20, 0, 30, 10], [10, 0, 30, 20]], |
| [[0, 0, 1, 1], [10, 11, 12, 13], [0, 0, 12, 13]], |
| [[11, 12, 98, 99], [22, 23, 34, 35], [11, 12, 98, 99]]]; |
| |
| for (var test in tests) { |
| var r0 = createRectangle(test[0]); |
| var r1 = createRectangle(test[1]); |
| var expected = createRectangle(test[2]); |
| |
| expect(r0.boundingBox(r1), expected); |
| expect(r1.boundingBox(r0), expected); |
| } |
| }); |
| |
| test('containsRectangle', () { |
| var r = new Rectangle(-10, 0, 20, 10); |
| expect(r.containsRectangle(r), isTrue); |
| |
| expect(r.containsRectangle( |
| new Rectangle(double.NAN, double.NAN, double.NAN, double.NAN)), isFalse); |
| |
| var r2 = new Rectangle(0, 2, 5, 5); |
| expect(r.containsRectangle(r2), isTrue); |
| expect(r2.containsRectangle(r), isFalse); |
| |
| r2 = new Rectangle(-11, 2, 5, 5); |
| expect(r.containsRectangle(r2), isFalse); |
| r2 = new Rectangle(0, 2, 15, 5); |
| expect(r.containsRectangle(r2), isFalse); |
| r2 = new Rectangle(0, 2, 5, 10); |
| expect(r.containsRectangle(r2), isFalse); |
| r2 = new Rectangle(0, 0, 5, 10); |
| expect(r.containsRectangle(r2), isTrue); |
| }); |
| |
| test('containsPoint', () { |
| var r = new Rectangle(20, 40, 60, 80); |
| |
| // Test middle. |
| expect(r.containsPoint(new Point(50, 80)), isTrue); |
| |
| // Test edges. |
| expect(r.containsPoint(new Point(20, 40)), isTrue); |
| expect(r.containsPoint(new Point(50, 40)), isTrue); |
| expect(r.containsPoint(new Point(80, 40)), isTrue); |
| expect(r.containsPoint(new Point(80, 80)), isTrue); |
| expect(r.containsPoint(new Point(80, 120)), isTrue); |
| expect(r.containsPoint(new Point(50, 120)), isTrue); |
| expect(r.containsPoint(new Point(20, 120)), isTrue); |
| expect(r.containsPoint(new Point(20, 80)), isTrue); |
| |
| // Test outside. |
| expect(r.containsPoint(new Point(0, 0)), isFalse); |
| expect(r.containsPoint(new Point(50, 0)), isFalse); |
| expect(r.containsPoint(new Point(100, 0)), isFalse); |
| expect(r.containsPoint(new Point(100, 80)), isFalse); |
| expect(r.containsPoint(new Point(100, 160)), isFalse); |
| expect(r.containsPoint(new Point(50, 160)), isFalse); |
| expect(r.containsPoint(new Point(0, 160)), isFalse); |
| expect(r.containsPoint(new Point(0, 80)), isFalse); |
| }); |
| |
| test('hashCode', () { |
| var a = new Rectangle(0, 1, 2, 3); |
| var b = new Rectangle(0, 1, 2, 3); |
| expect(a.hashCode, b.hashCode); |
| |
| var c = new Rectangle(1, 0, 2, 3); |
| expect(a.hashCode == c.hashCode, isFalse); |
| }); |
| |
| { // Edge cases for boundingBox/intersection |
| edgeTest(a, l) { |
| test('edge case $a/$l', () { |
| var r = new Rectangle(a, a, l, l); |
| expect(r.boundingBox(r), r); |
| expect(r.intersection(r), r); |
| }); |
| } |
| |
| var bignum1 = 0x20000000000000 + 0.0; |
| var bignum2 = 0x20000000000002 + 0.0; |
| var bignum3 = 0x20000000000004 + 0.0; |
| edgeTest(1.0, bignum1); |
| edgeTest(1.0, bignum2); |
| edgeTest(1.0, bignum3); |
| edgeTest(bignum1, 1.0); |
| edgeTest(bignum2, 1.0); |
| edgeTest(bignum3, 1.0); |
| } |
| |
| test("equality with different widths", () { |
| var bignum = 0x80000000000008 + 0.0; |
| var r1 = new Rectangle(bignum, bignum, 1.0, 1.0); |
| var r2 = new Rectangle(bignum, bignum, 2.0, 2.0); |
| expect(r1, r2); |
| expect(r1.hashCode, r2.hashCode); |
| expect(r1.right, r2.right); |
| expect(r1.bottom, r2.bottom); |
| expect(r1.width, 1.0); |
| expect(r2.width, 2.0); |
| }); |
| |
| test('negative lengths', () { |
| // Constructor allows negative lengths, but clamps them to zero. |
| expect(new Rectangle(4, 4, -2, -2), new Rectangle(4, 4, 0, 0)); |
| expect(new MutableRectangle(4, 4, -2, -2), new Rectangle(4, 4, 0, 0)); |
| |
| // Setters clamp negative lengths to zero. |
| var r = new MutableRectangle(0, 0, 1, 1); |
| r.width = -1; |
| r.height = -1; |
| expect(r, new Rectangle(0, 0, 0, 0)); |
| |
| // Test that doubles are clamped to double zero. |
| r = new Rectangle(1.5, 1.5, -2.5, -2.5); |
| expect(identical(r.width, 0.0), isTrue); |
| expect(identical(r.height, 0.0), isTrue); |
| }); |
| |
| // A NaN-value in any rectangle value means the rectange is considered |
| // empty (contains no points, doesn't intersect any other rectangle). |
| const NaN = double.NAN; |
| var isNaN = predicate((x) => x is double && x.isNaN, "NaN"); |
| |
| test('NaN left', () { |
| var rectangles = [ |
| const Rectangle(NaN, 1, 2, 3), |
| new MutableRectangle(NaN, 1, 2, 3), |
| new Rectangle.fromPoints(new Point(NaN, 1), new Point(2, 4)), |
| new MutableRectangle.fromPoints(new Point(NaN, 1), new Point(2, 4)), |
| ]; |
| for (var r in rectangles) { |
| expect(r.containsPoint(new Point(0, 1)), false); |
| expect(r.containsRectangle(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.intersects(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.left, isNaN); |
| expect(r.right, isNaN); |
| } |
| }); |
| |
| test('NaN top', () { |
| var rectangles = [ |
| const Rectangle(0, NaN, 2, 3), |
| new MutableRectangle(0, NaN, 2, 3), |
| new Rectangle.fromPoints(new Point(0, NaN), new Point(2, 4)), |
| new MutableRectangle.fromPoints(new Point(0, NaN), new Point(2, 4)), |
| ]; |
| for (var r in rectangles) { |
| expect(r.containsPoint(new Point(0, 1)), false); |
| expect(r.containsRectangle(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.intersects(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.top, isNaN); |
| expect(r.bottom, isNaN); |
| } |
| }); |
| |
| test('NaN width', () { |
| var rectangles = [ |
| const Rectangle(0, 1, NaN, 3), |
| new MutableRectangle(0, 1, NaN, 3), |
| new Rectangle.fromPoints(new Point(0, 1), new Point(NaN, 4)), |
| new MutableRectangle.fromPoints(new Point(0, 1), new Point(NaN, 4)), |
| ]; |
| for (var r in rectangles) { |
| expect(r.containsPoint(new Point(0, 1)), false); |
| expect(r.containsRectangle(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.intersects(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.right, isNaN); |
| expect(r.width, isNaN); |
| } |
| }); |
| |
| test('NaN heigth', () { |
| var rectangles = [ |
| const Rectangle(0, 1, 2, NaN), |
| new MutableRectangle(0, 1, 2, NaN), |
| new Rectangle.fromPoints(new Point(0, 1), new Point(2, NaN)), |
| new MutableRectangle.fromPoints(new Point(0, 1), new Point(2, NaN)), |
| ]; |
| for (var r in rectangles) { |
| expect(r.containsPoint(new Point(0, 1)), false); |
| expect(r.containsRectangle(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.intersects(new Rectangle(0, 1, 2, 3)), false); |
| expect(r.bottom, isNaN); |
| expect(r.height, isNaN); |
| } |
| }); |
| } |
| |