Adding Point & Rect primitives

tests/html/rect_test.dart

+// 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:html';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+main() {
+  useHtmlConfiguration();
+
+  Rect createRect(List<num> a) {
+    return a != null ? new Rect(a[0], a[1], a[2] - a[0], a[3] - a[1]) : null;
+  }
+
+  test('construction', () {
+    var r0 = new Rect(10, 20, 30, 40);
+    expect(r0.toString(), '(10, 20, 30, 40)');
+    expect(r0.right, 40);
+    expect(r0.bottom, 60);
+
+    var r1 = new Rect.fromPoints(r0.topLeft, r0.bottomRight);
+    expect(r1, r0);
+
+    var r2 = new Rect.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 = createRect(test[0]);
+      var r1 = createRect(test[1]);
+      var expected = createRect(test[2]);
+
+      expect(r0.intersection(r1), expected);
+      expect(r1.intersection(r0), expected);
+    }
+  });
+
+  test('intersects', () {
+    var r0 = new Rect(10, 10, 20, 20);
+    var r1 = new Rect(15, 15, 25, 25);
+    var r2 = new Rect(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('union', () {
+    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 = createRect(test[0]);
+      var r1 = createRect(test[1]);
+      var expected = createRect(test[2]);
+
+      expect(r0.union(r1), expected);
+      expect(r1.union(r0), expected);
+    }
+  });
+
+  test('containsRect', () {
+    var r = new Rect(-10, 0, 20, 10);
+    expect(r.containsRect(r), isTrue);
+
+    expect(r.containsRect(
+        new Rect(double.NAN, double.NAN, double.NAN, double.NAN)), isFalse);
+
+    var r2 = new Rect(0, 2, 5, 5);
+    expect(r.containsRect(r2), isTrue);
+    expect(r2.containsRect(r), isFalse);
+
+    r2 = new Rect(-11, 2, 5, 5);
+    expect(r.containsRect(r2), isFalse);
+    r2 = new Rect(0, 2, 15, 5);
+    expect(r.containsRect(r2), isFalse);
+    r2 = new Rect(0, 2, 5, 10);
+    expect(r.containsRect(r2), isFalse);
+    r2 = new Rect(0, 0, 5, 10);
+    expect(r.containsRect(r2), isTrue);
+  });
+
+  test('containsPoint', () {
+    var r = new Rect(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('ceil', () {
+    var rect = new Rect(11.4, 26.6, 17.8, 9.2);
+    expect(rect.ceil(), new Rect(12.0, 27.0, 18.0, 10.0));
+  });
+
+  test('floor', () {
+    var rect = new Rect(11.4, 26.6, 17.8, 9.2);
+    expect(rect.floor(), new Rect(11.0, 26.0, 17.0, 9.0));
+  });
+
+  test('round', () {
+    var rect = new Rect(11.4, 26.6, 17.8, 9.2);
+    expect(rect.round(), new Rect(11.0, 27.0, 18.0, 9.0));
+  });
+
+  test('toInt', () {
+    var rect = new Rect(11.4, 26.6, 17.8, 9.2);
+    var b = rect.toInt();
+    expect(b, new Rect(11, 26, 17, 9));
+
+    expect(b.left is int, isTrue);
+    expect(b.top is int, isTrue);
+    expect(b.width is int, isTrue);
+    expect(b.height is int, isTrue);
+  });
+}