src/third_party/closure_library/closure/goog/math/paths_test.js

// Copyright 2006 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Unit tests for goog.math.paths.
 */

goog.provide('goog.math.pathsTest');

goog.require('goog.math.Coordinate');
goog.require('goog.math.paths');
goog.require('goog.testing.jsunit');

goog.setTestOnly('goog.math.pathsTest');


var regularNGon = goog.math.paths.createRegularNGon;
var arrow = goog.math.paths.createArrow;

function testSquare() {
  var square = regularNGon(
      $coord(10, 10), $coord(0, 10), 4);
  assertArrayRoughlyEquals(
      [0, 10, 10, 0, 20, 10, 10, 20], square.arguments_, 0.05);
}

function assertArrayRoughlyEquals(expected, actual, delta) {
  var message = 'Expected: ' + expected + ', Actual: ' + actual;
  assertEquals('Wrong length. ' + message, expected.length, actual.length);
  for (var i = 0; i < expected.length; i++) {
    assertRoughlyEquals(
        'Wrong item at ' + i + '. ' + message,
        expected[i], actual[i], delta);
  }
}

function $coord(x, y) {
  return new goog.math.Coordinate(x, y);
}