Adding mapbox-gl branch

2015-03-16 18:50:27 +01:00
parent 7985f030fa
commit 57ee7f52fd
3109 changed files with 943365 additions and 0 deletions
@@ -0,0 +1,94 @@
+// Copyright 2009 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.
+
+goog.provide('goog.testing.PseudoRandomTest');
+goog.setTestOnly('goog.testing.PseudoRandomTest');
+
+goog.require('goog.testing.PseudoRandom');
+goog.require('goog.testing.jsunit');
+
+function runFairnessTest(sides, rolls, chiSquareLimit) {
+  // Initialize the count table for dice rolls.
+  var counts = [];
+  for (var i = 0; i < sides; ++i) {
+    counts[i] = 0;
+  }
+  // Roll the dice many times and count the results.
+  for (var i = 0; i < rolls; ++i) {
+    ++counts[Math.floor(Math.random() * sides)];
+  }
+  // If the dice is fair, we expect a uniform distribution.
+  var expected = rolls / sides;
+  // Pearson's chi-square test for a distribution fit.
+  var chiSquare = 0;
+  for (var i = 0; i < sides; ++i) {
+    chiSquare += (counts[i] - expected) * (counts[i] - expected) / expected;
+  }
+  assert('Chi-square test for a distribution fit failed',
+      chiSquare < chiSquareLimit);
+}
+
+function testInstall() {
+  var random = new goog.testing.PseudoRandom();
+  var originalRandom = Math.random;
+
+  assertFalse(!!random.installed_);
+
+  random.install();
+  assertTrue(random.installed_);
+  assertNotEquals(Math.random, originalRandom);
+
+  random.uninstall();
+  assertFalse(random.installed_);
+  assertEquals(originalRandom, Math.random);
+}
+
+function testBounds() {
+  var random = new goog.testing.PseudoRandom();
+  random.install();
+
+  for (var i = 0; i < 100000; ++i) {
+    var value = Math.random();
+    assert('Random value out of bounds', value >= 0 && value < 1);
+  }
+
+  random.uninstall();
+}
+
+function testFairness() {
+  var random = new goog.testing.PseudoRandom(0, true);
+
+  // Chi-square statistics: p-value = 0.05, df = 5, limit = 11.07.
+  runFairnessTest(6, 100000, 11.07);
+  // Chi-square statistics: p-value = 0.05, df = 100, limit = 124.34.
+  runFairnessTest(101, 100000, 124.34);
+
+  random.uninstall();
+}
+
+function testReseed() {
+  var random = new goog.testing.PseudoRandom(100, true);
+
+  var sequence = [];
+  for (var i = 0; i < 64000; ++i) {
+    sequence.push(Math.random());
+  }
+
+  random.seed(100);
+  for (var i = 0; i < sequence.length; ++i) {
+    assertEquals(sequence[i], Math.random());
+  }
+
+  random.uninstall();
+}