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 // 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. import 'dart:math'; import 'package:expect/expect.dart'; main() { testConstruction(); testIntersection(); testIntersects(); testBoundingBox(); testContainsRectangle(); testContainsPoint(); testHashCode(); testEdgeCases(); testEquality(); testNegativeLengths(); testNaNLeft(); testNaNTop(); testNaNWidth(); testNaNHeight(); } Rectangle? createRectangle(List? a) { return a != null ? new Rectangle(a[0], a[1], a[2] - a[0], a[3] - a[1]) : null; } testConstruction() { var r0 = new Rectangle(10, 20, 30, 40); Expect.equals('Rectangle (10, 20) 30 x 40', r0.toString()); Expect.equals(40, r0.right); Expect.equals(60, r0.bottom); var r1 = new Rectangle.fromPoints(r0.topLeft, r0.bottomRight); Expect.equals(r0, r1); var r2 = new Rectangle.fromPoints(r0.bottomRight, r0.topLeft); Expect.equals(r0, r2); } testIntersection() { 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.equals(expected, r0?.intersection(r1!)); Expect.equals(expected, r1?.intersection(r0!)); } } testIntersects() { 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.isTrue(r0.intersects(r1)); Expect.isTrue(r1.intersects(r0)); Expect.isFalse(r0.intersects(r2)); Expect.isFalse(r2.intersects(r0)); } testBoundingBox() { 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.equals(expected, r0?.boundingBox(r1!)); Expect.equals(expected, r1?.boundingBox(r0!)); } } testContainsRectangle() { var r = new Rectangle(-10, 0, 20, 10); Expect.isTrue(r.containsRectangle(r)); Expect.isFalse(r.containsRectangle( new Rectangle(double.nan, double.nan, double.nan, double.nan))); var r2 = new Rectangle(0, 2, 5, 5); Expect.isTrue(r.containsRectangle(r2)); Expect.isFalse(r2.containsRectangle(r)); r2 = new Rectangle(-11, 2, 5, 5); Expect.isFalse(r.containsRectangle(r2)); r2 = new Rectangle(0, 2, 15, 5); Expect.isFalse(r.containsRectangle(r2)); r2 = new Rectangle(0, 2, 5, 10); Expect.isFalse(r.containsRectangle(r2)); r2 = new Rectangle(0, 0, 5, 10); Expect.isTrue(r.containsRectangle(r2)); } testContainsPoint() { var r = new Rectangle(20, 40, 60, 80); // Test middle. Expect.isTrue(r.containsPoint(new Point(50, 80))); // Test edges. Expect.isTrue(r.containsPoint(new Point(20, 40))); Expect.isTrue(r.containsPoint(new Point(50, 40))); Expect.isTrue(r.containsPoint(new Point(80, 40))); Expect.isTrue(r.containsPoint(new Point(80, 80))); Expect.isTrue(r.containsPoint(new Point(80, 120))); Expect.isTrue(r.containsPoint(new Point(50, 120))); Expect.isTrue(r.containsPoint(new Point(20, 120))); Expect.isTrue(r.containsPoint(new Point(20, 80))); // Test outside. Expect.isFalse(r.containsPoint(new Point(0, 0))); Expect.isFalse(r.containsPoint(new Point(50, 0))); Expect.isFalse(r.containsPoint(new Point(100, 0))); Expect.isFalse(r.containsPoint(new Point(100, 80))); Expect.isFalse(r.containsPoint(new Point(100, 160))); Expect.isFalse(r.containsPoint(new Point(50, 160))); Expect.isFalse(r.containsPoint(new Point(0, 160))); Expect.isFalse(r.containsPoint(new Point(0, 80))); } testHashCode() { var a = new Rectangle(0, 1, 2, 3); var b = new Rectangle(0, 1, 2, 3); Expect.equals(b.hashCode, a.hashCode); var c = new Rectangle(1, 0, 2, 3); Expect.isFalse(a.hashCode == c.hashCode); } testEdgeCases() { edgeTest(double a, double l) { var r = new Rectangle(a, a, l, l); Expect.equals(r, r.boundingBox(r)); Expect.equals(r, r.intersection(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); } testEquality() { 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.equals(r2, r1); Expect.equals(r2.hashCode, r1.hashCode); Expect.equals(r2.right, r1.right); Expect.equals(r2.bottom, r1.bottom); Expect.equals(1.0, r1.width); Expect.equals(2.0, r2.width); } testNegativeLengths() { // Constructor allows negative lengths, but clamps them to zero. Expect.equals(new Rectangle(4, 4, 0, 0), new Rectangle(4, 4, -2, -2)); Expect.equals(new Rectangle(4, 4, 0, 0), new MutableRectangle(4, 4, -2, -2)); // Setters clamp negative lengths to zero. var mutable = new MutableRectangle(0, 0, 1, 1); mutable.width = -1; mutable.height = -1; Expect.equals(new Rectangle(0, 0, 0, 0), mutable); // Test that doubles are clamped to double zero. var rectangle = new Rectangle(1.5, 1.5, -2.5, -2.5); Expect.isTrue(identical(rectangle.width, 0.0)); Expect.isTrue(identical(rectangle.height, 0.0)); } testNaNLeft() { var rectangles = [ const Rectangle(double.nan, 1, 2, 3), new MutableRectangle(double.nan, 1, 2, 3), new Rectangle.fromPoints(new Point(double.nan, 1), new Point(2, 4)), new MutableRectangle.fromPoints(new Point(double.nan, 1), new Point(2, 4)), ]; for (var r in rectangles) { Expect.isFalse(r.containsPoint(new Point(0, 1))); Expect.isFalse(r.containsRectangle(new Rectangle(0, 1, 2, 3))); Expect.isFalse(r.intersects(new Rectangle(0, 1, 2, 3))); Expect.isTrue(r.left.isNaN); Expect.isTrue(r.right.isNaN); } } testNaNTop() { var rectangles = [ const Rectangle(0, double.nan, 2, 3), new MutableRectangle(0, double.nan, 2, 3), new Rectangle.fromPoints(new Point(0, double.nan), new Point(2, 4)), new MutableRectangle.fromPoints(new Point(0, double.nan), new Point(2, 4)), ]; for (var r in rectangles) { Expect.isFalse(r.containsPoint(new Point(0, 1))); Expect.isFalse(r.containsRectangle(new Rectangle(0, 1, 2, 3))); Expect.isFalse(r.intersects(new Rectangle(0, 1, 2, 3))); Expect.isTrue(r.top.isNaN); Expect.isTrue(r.bottom.isNaN); } } testNaNWidth() { var rectangles = [ const Rectangle(0, 1, double.nan, 3), new MutableRectangle(0, 1, double.nan, 3), new Rectangle.fromPoints(new Point(0, 1), new Point(double.nan, 4)), new MutableRectangle.fromPoints(new Point(0, 1), new Point(double.nan, 4)), ]; for (var r in rectangles) { Expect.isFalse(r.containsPoint(new Point(0, 1))); Expect.isFalse(r.containsRectangle(new Rectangle(0, 1, 2, 3))); Expect.isFalse(r.intersects(new Rectangle(0, 1, 2, 3))); Expect.isTrue(r.right.isNaN); Expect.isTrue(r.width.isNaN); } } testNaNHeight() { var rectangles = [ const Rectangle(0, 1, 2, double.nan), new MutableRectangle(0, 1, 2, double.nan), new Rectangle.fromPoints(new Point(0, 1), new Point(2, double.nan)), new MutableRectangle.fromPoints(new Point(0, 1), new Point(2, double.nan)), ]; for (var r in rectangles) { Expect.isFalse(r.containsPoint(new Point(0, 1))); Expect.isFalse(r.containsRectangle(new Rectangle(0, 1, 2, 3))); Expect.isFalse(r.intersects(new Rectangle(0, 1, 2, 3))); Expect.isTrue(r.bottom.isNaN); Expect.isTrue(r.height.isNaN); } }