Andreas Hocevar
519 lines
14 KiB
JavaScript
519 lines
14 KiB
JavaScript
// Copyright 2008 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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goog.provide('goog.math.PathTest');
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goog.require('goog.array');
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goog.require('goog.math.AffineTransform');
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goog.require('goog.math.Path');
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goog.require('goog.testing.jsunit');
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goog.setTestOnly('goog.math.PathTest');
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/**
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* Array mapping numeric segment constant to a descriptive character.
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* @type {!Array<string>}
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* @private
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*/
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var SEGMENT_NAMES_ = function() {
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var arr = [];
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arr[goog.math.Path.Segment.MOVETO] = 'M';
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arr[goog.math.Path.Segment.LINETO] = 'L';
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arr[goog.math.Path.Segment.CURVETO] = 'C';
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arr[goog.math.Path.Segment.ARCTO] = 'A';
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arr[goog.math.Path.Segment.CLOSE] = 'X';
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return arr;
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}();
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/**
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* Test if the given path matches the expected array of commands and parameters.
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* @param {Array<string|number>} expected The expected array of commands and
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* parameters.
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* @param {goog.math.Path} path The path to test against.
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*/
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var assertPathEquals = function(expected, path) {
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var actual = [];
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path.forEachSegment(function(seg, args) {
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actual.push(SEGMENT_NAMES_[seg]);
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Array.prototype.push.apply(actual, args);
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});
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assertEquals(expected.length, actual.length);
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for (var i = 0; i < expected.length; i++) {
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if (goog.isNumber(expected[i])) {
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assertTrue(goog.isNumber(actual[i]));
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assertRoughlyEquals(expected[i], actual[i], 0.01);
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} else {
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assertEquals(expected[i], actual[i]);
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}
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}
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};
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function testConstructor() {
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var path = new goog.math.Path();
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assertTrue(path.isSimple());
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assertNull(path.getCurrentPoint());
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assertPathEquals([], path);
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}
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function testGetSegmentCount() {
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assertArrayEquals([2, 2, 6, 6, 0], goog.array.map([
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goog.math.Path.Segment.MOVETO,
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goog.math.Path.Segment.LINETO,
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goog.math.Path.Segment.CURVETO,
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goog.math.Path.Segment.ARCTO,
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goog.math.Path.Segment.CLOSE
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], goog.math.Path.getSegmentCount));
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}
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function testSimpleMoveTo() {
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var path = new goog.math.Path();
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path.moveTo(30, 50);
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assertTrue(path.isSimple());
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assertObjectEquals([30, 50], path.getCurrentPoint());
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assertPathEquals(['M', 30, 50], path);
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}
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function testRepeatedMoveTo() {
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var path = new goog.math.Path();
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path.moveTo(30, 50);
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path.moveTo(40, 60);
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assertTrue(path.isSimple());
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assertObjectEquals([40, 60], path.getCurrentPoint());
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assertPathEquals(['M', 40, 60], path);
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}
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function testSimpleLineTo_fromArgs() {
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var path = new goog.math.Path();
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var e = assertThrows(function() {
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path.lineTo(30, 50);
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});
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assertEquals('Path cannot start with lineTo', e.message);
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path.moveTo(0, 0);
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path.lineTo(30, 50);
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assertTrue(path.isSimple());
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assertObjectEquals([30, 50], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50], path);
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}
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function testSimpleLineTo_fromArray() {
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var path = new goog.math.Path();
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var e = assertThrows(function() {
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path.lineToFromArray([30, 50]);
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});
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assertEquals('Path cannot start with lineTo', e.message);
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path.moveTo(0, 0);
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path.lineToFromArray([30, 50]);
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assertTrue(path.isSimple());
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assertObjectEquals([30, 50], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50], path);
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}
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function testMultiArgLineTo_fromArgs() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(30, 50, 40 , 60);
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assertTrue(path.isSimple());
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assertObjectEquals([40, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50, 40, 60], path);
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}
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function testMultiArgLineTo_fromArray() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineToFromArray([30, 50, 40 , 60]);
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assertTrue(path.isSimple());
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assertObjectEquals([40, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50, 40, 60], path);
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}
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function testRepeatedLineTo_fromArgs() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(30, 50);
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path.lineTo(40, 60);
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assertTrue(path.isSimple());
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assertObjectEquals([40, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50, 40, 60], path);
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}
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function testRepeatedLineTo_fromArray() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineToFromArray([30, 50]);
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path.lineToFromArray([40, 60]);
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assertTrue(path.isSimple());
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assertObjectEquals([40, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'L', 30, 50, 40, 60], path);
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}
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function testSimpleCurveTo_fromArgs() {
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var path = new goog.math.Path();
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var e = assertThrows(function() {
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path.curveTo(10, 20, 30, 40, 50, 60);
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});
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assertEquals('Path cannot start with curve', e.message);
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path.moveTo(0, 0);
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path.curveTo(10, 20, 30, 40, 50, 60);
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assertTrue(path.isSimple());
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assertObjectEquals([50, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60], path);
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}
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function testSimpleCurveTo_fromArray() {
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var path = new goog.math.Path();
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var e = assertThrows(function() {
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path.curveToFromArray([10, 20, 30, 40, 50, 60]);
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});
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assertEquals('Path cannot start with curve', e.message);
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path.moveTo(0, 0);
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path.curveToFromArray([10, 20, 30, 40, 50, 60]);
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assertTrue(path.isSimple());
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assertObjectEquals([50, 60], path.getCurrentPoint());
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assertPathEquals(['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60], path);
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}
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function testMultiCurveTo_fromArgs() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.curveTo(10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120);
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assertTrue(path.isSimple());
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assertObjectEquals([110, 120], path.getCurrentPoint());
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assertPathEquals(
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['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120],
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path);
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}
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function testMultiCurveTo_fromArray() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.curveToFromArray([10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120]);
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assertTrue(path.isSimple());
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assertObjectEquals([110, 120], path.getCurrentPoint());
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assertPathEquals(
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['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120],
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path);
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}
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function testRepeatedCurveTo_fromArgs() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.curveTo(10, 20, 30, 40, 50, 60);
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path.curveTo(70, 80, 90, 100, 110, 120);
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assertTrue(path.isSimple());
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assertObjectEquals([110, 120], path.getCurrentPoint());
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assertPathEquals(
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['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120],
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path);
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}
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function testRepeatedCurveTo_fromArray() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.curveToFromArray([10, 20, 30, 40, 50, 60]);
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path.curveToFromArray([70, 80, 90, 100, 110, 120]);
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assertTrue(path.isSimple());
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assertObjectEquals([110, 120], path.getCurrentPoint());
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assertPathEquals(
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['M', 0, 0, 'C', 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120],
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path);
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}
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function testSimpleArc() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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assertFalse(path.isSimple());
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var p = path.getCurrentPoint();
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assertEquals(55, p[0]);
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assertRoughlyEquals(77.32, p[1], 0.01);
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assertPathEquals(
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['M', 58.66, 70, 'A', 10, 20, 30, 30, 55, 77.32], path);
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}
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function testArcNonConnectClose() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.arc(10, 10, 10, 10, -90, 180, false);
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assertObjectEquals([10, 20], path.getCurrentPoint());
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path.close();
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assertObjectEquals([10, 0], path.getCurrentPoint());
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}
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function testRepeatedArc() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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path.arc(50, 60, 10, 20, 60, 30, false);
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assertFalse(path.isSimple());
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assertObjectEquals([50, 80], path.getCurrentPoint());
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assertPathEquals(['M', 58.66, 70,
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'A', 10, 20, 30, 30, 55, 77.32,
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'M', 55, 77.32,
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'A', 10, 20, 60, 30, 50, 80], path);
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}
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function testRepeatedArc2() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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path.arc(50, 60, 10, 20, 60, 30, true);
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assertPathEquals(['M', 58.66, 70,
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'A', 10, 20, 30, 30, 55, 77.32,
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'A', 10, 20, 60, 30, 50, 80], path);
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}
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function testCompleteCircle() {
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var path = new goog.math.Path();
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path.arc(0, 0, 10, 10, 0, 360, false);
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assertFalse(path.isSimple());
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var p = path.getCurrentPoint();
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assertRoughlyEquals(10, p[0], 0.01);
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assertRoughlyEquals(0, p[1], 0.01);
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assertPathEquals(
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['M', 10, 0, 'A', 10, 10, 0, 360, 10, 0], path);
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}
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function testClose() {
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var path = new goog.math.Path();
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assertThrows('Path cannot start with close',
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function() {
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path.close();
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});
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path.moveTo(0, 0);
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path.lineTo(10, 20, 30, 40, 50, 60);
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path.close();
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assertTrue(path.isSimple());
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assertObjectEquals([0, 0], path.getCurrentPoint());
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assertPathEquals(
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['M', 0, 0, 'L', 10, 20, 30, 40, 50, 60, 'X'], path);
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}
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function testClear() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.arc(50, 60, 10, 20, 30, 30, false);
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path.clear();
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assertTrue(path.isSimple());
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assertNull(path.getCurrentPoint());
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assertPathEquals([], path);
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}
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function testCreateSimplifiedPath() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.arc(50, 60, 10, 20, 30, 30, false);
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assertFalse(path.isSimple());
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path = goog.math.Path.createSimplifiedPath(path);
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assertTrue(path.isSimple());
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var p = path.getCurrentPoint();
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assertEquals(55, p[0]);
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assertRoughlyEquals(77.32, p[1], 0.01);
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assertPathEquals(['M', 58.66, 70,
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'C', 57.78, 73.04, 56.52, 75.57, 55, 77.32], path);
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}
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function testCreateSimplifiedPath2() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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path.arc(50, 60, 10, 20, 60, 30, false);
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assertFalse(path.isSimple());
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path = goog.math.Path.createSimplifiedPath(path);
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assertTrue(path.isSimple());
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assertPathEquals(['M', 58.66, 70,
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'C', 57.78, 73.04, 56.52, 75.57, 55, 77.32,
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'M', 55, 77.32,
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'C', 53.48, 79.08, 51.76, 80, 50, 80], path);
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}
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function testCreateSimplifiedPath3() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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path.arc(50, 60, 10, 20, 60, 30, true);
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path.close();
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path = goog.math.Path.createSimplifiedPath(path);
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assertPathEquals(['M', 58.66, 70,
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'C', 57.78, 73.04, 56.52, 75.57, 55, 77.32,
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53.48, 79.08, 51.76, 80, 50, 80, 'X'], path);
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var p = path.getCurrentPoint();
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assertRoughlyEquals(58.66, p[0], 0.01);
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assertRoughlyEquals(70, p[1], 0.01);
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}
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function testArcToAsCurves() {
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var path = new goog.math.Path();
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path.moveTo(58.66, 70);
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path.arcToAsCurves(10, 20, 30, 30);
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assertPathEquals(['M', 58.66, 70,
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'C', 57.78, 73.04, 56.52, 75.57, 55, 77.32], path);
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}
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function testCreateTransformedPath() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(0, 10, 10, 10, 10, 0);
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path.close();
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var tx = new goog.math.AffineTransform(2, 0, 0, 3, 10, 20);
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var path2 = path.createTransformedPath(tx);
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assertPathEquals(
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['M', 0, 0, 'L', 0, 10, 10, 10, 10, 0, 'X'], path);
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assertPathEquals(
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['M', 10, 20, 'L', 10, 50, 30, 50, 30, 20, 'X'], path2);
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}
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function testTransform() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(0, 10, 10, 10, 10, 0);
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path.close();
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var tx = new goog.math.AffineTransform(2, 0, 0, 3, 10, 20);
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var path2 = path.transform(tx);
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assertTrue(path === path2);
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assertPathEquals(
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['M', 10, 20, 'L', 10, 50, 30, 50, 30, 20, 'X'], path2);
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}
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function testTransformCurrentAndClosePoints() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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assertObjectEquals([0, 0], path.getCurrentPoint());
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path.transform(new goog.math.AffineTransform(1, 0, 0, 1, 10, 20));
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assertObjectEquals([10, 20], path.getCurrentPoint());
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path.lineTo(50, 50);
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path.close();
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assertObjectEquals([10, 20], path.getCurrentPoint());
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}
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function testTransformNonSimple() {
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var path = new goog.math.Path();
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path.arc(50, 60, 10, 20, 30, 30, false);
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assertThrows(function() {
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path.transform(new goog.math.AffineTransform(1, 0, 0, 1, 10, 20));
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});
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}
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function testAppendPath() {
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var path1 = new goog.math.Path();
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path1.moveTo(0, 0);
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path1.lineTo(0, 10, 10, 10, 10, 0);
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path1.close();
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var path2 = new goog.math.Path();
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path2.arc(50, 60, 10, 20, 30, 30, false);
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assertTrue(path1.isSimple());
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path1.appendPath(path2);
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assertFalse(path1.isSimple());
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assertPathEquals([
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'M', 0, 0, 'L', 0, 10, 10, 10, 10, 0, 'X',
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'M', 58.66, 70, 'A', 10, 20, 30, 30, 55, 77.32
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], path1);
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}
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function testIsEmpty() {
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var path = new goog.math.Path();
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assertTrue('Initially path is empty', path.isEmpty());
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path.moveTo(0, 0);
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assertFalse('After command addition, path is not empty', path.isEmpty());
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path.clear();
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assertTrue('After clear, path is empty again', path.isEmpty());
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}
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function testGetSegmentTypes() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(10, 20, 30, 40);
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path.close();
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var Segment = goog.math.Path.Segment;
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var segmentTypes = path.getSegmentTypes();
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assertArrayEquals(
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'The returned segment types do not match the expected values',
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[Segment.MOVETO, Segment.LINETO, Segment.CLOSE], segmentTypes);
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segmentTypes[2] = Segment.LINETO;
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assertArrayEquals('Modifying the returned segment types changed the path',
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[Segment.MOVETO, Segment.LINETO, Segment.CLOSE], path.getSegmentTypes());
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}
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function testGetSegmentCounts() {
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var path = new goog.math.Path();
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path.moveTo(0, 0);
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path.lineTo(10, 20, 30, 40);
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path.close();
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var segmentTypes = path.getSegmentCounts();
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assertArrayEquals(
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|
'The returned segment counts do not match the expected values',
|
|
[1, 2, 1], segmentTypes);
|
|
|
|
segmentTypes[1] = 3;
|
|
assertArrayEquals('Modifying the returned segment counts changed the path',
|
|
[1, 2, 1], path.getSegmentCounts());
|
|
}
|
|
|
|
|
|
function testGetSegmentArgs() {
|
|
var path = new goog.math.Path();
|
|
path.moveTo(0, 0);
|
|
path.lineTo(10, 20, 30, 40);
|
|
path.close();
|
|
|
|
var segmentTypes = path.getSegmentArgs();
|
|
assertArrayEquals(
|
|
'The returned segment args do not match the expected values',
|
|
[0, 0, 10, 20, 30, 40], segmentTypes);
|
|
|
|
segmentTypes[1] = -10;
|
|
assertArrayEquals(
|
|
'Modifying the returned segment args changed the path',
|
|
[0, 0, 10, 20, 30, 40], path.getSegmentArgs());
|
|
}
|