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-// 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.
-
-/**
- * @fileoverview Utility for sharding tests.
- *
- * Usage instructions:
- * <ol>
- * <li>Instead of writing your large test in foo_test.html, write it in
- * foo_test_template.html</li>
- * <li>Add a call to {@code goog.testing.ShardingTestCase.shardByFileName()}
- * near the top of your test, before any test cases or setup methods.</li>
- * <li>Symlink foo_test_template.html into different sharded test files
- * named foo_1of4_test.html, foo_2of4_test.html, etc, using `ln -s`.</li>
- * <li>Add the symlinks as foo_1of4_test.html.
- * In perforce, run the command `g4 add foo_1of4_test.html` followed
- * by `g4 reopen -t symlink foo_1of4_test.html` so that perforce treats the file
- * as a symlink
- * </li>
- * </ol>
- *
- */
-
-goog.provide('goog.testing.ShardingTestCase');
-
-goog.require('goog.asserts');
-goog.require('goog.testing.TestCase');
-
-/**
- * A test case that runs tests in per-file shards.
- * @param {number} shardIndex Shard index for this page,
- * <strong>1-indexed</strong>.
- * @param {number} numShards Number of shards to split up test cases into.
- * @extends {goog.testing.TestCase}
- * @constructor
- */
-goog.testing.ShardingTestCase = function(shardIndex, numShards, opt_name) {
- goog.base(this, opt_name);
-
- goog.asserts.assert(shardIndex > 0, 'Shard index should be positive');
- goog.asserts.assert(numShards > 0, 'Number of shards should be positive');
- goog.asserts.assert(shardIndex <= numShards,
- 'Shard index out of bounds');
-
- /**
- * @type {number}
- * @private
- */
- this.shardIndex_ = shardIndex;
-
- /**
- * @type {number}
- * @private
- */
- this.numShards_ = numShards;
-};
-goog.inherits(goog.testing.ShardingTestCase, goog.testing.TestCase);
-
-
-/**
- * Whether we've actually partitioned the tests yet. We may execute twice
- * ('Run again without reloading') without failing.
- * @type {boolean}
- * @private
- */
-goog.testing.ShardingTestCase.prototype.sharded_ = false;
-
-
-/**
- * Installs a runTests global function that goog.testing.JsUnit will use to
- * run tests, which will run a single shard of the tests present on the page.
- * @override
- */
-goog.testing.ShardingTestCase.prototype.runTests = function() {
- if (!this.sharded_) {
- var numTests = this.getCount();
- goog.asserts.assert(numTests >= this.numShards_,
- 'Must have at least as many tests as shards!');
- var shardSize = Math.ceil(numTests / this.numShards_);
- var startIndex = (this.shardIndex_ - 1) * shardSize;
- var endIndex = startIndex + shardSize;
- goog.asserts.assert(this.order == goog.testing.TestCase.Order.SORTED,
- 'Only SORTED order is allowed for sharded tests');
- this.setTests(this.getTests().slice(startIndex, endIndex));
- this.sharded_ = true;
- }
-
- // Call original runTests method to execute the tests.
- goog.base(this, 'runTests');
-};
-
-
-/**
- * Shards tests based on the test filename. Assumes that the filename is
- * formatted like 'foo_1of5_test.html'.
- * @param {string=} opt_name A descriptive name for the test case.
- */
-goog.testing.ShardingTestCase.shardByFileName = function(opt_name) {
- var path = window.location.pathname;
- var shardMatch = path.match(/_(\d+)of(\d+)_test\.html/);
- goog.asserts.assert(shardMatch,
- 'Filename must be of the form "foo_1of5_test.html"');
- var shardIndex = parseInt(shardMatch[1], 10);
- var numShards = parseInt(shardMatch[2], 10);
-
- var testCase = new goog.testing.ShardingTestCase(
- shardIndex, numShards, opt_name);
- goog.testing.TestCase.initializeTestRunner(testCase);
-};