Tests: Add support for running unit tests via grunt with karma

- Update QUnit to 1.23.1
- Remove unused dl#dl from test/index.html
- Remove unused map#imgmap from test/index.html
- Ensure all urls to data use baseURI
- Add the 'grunt karma:main' task
  - customContextFile & customDebugFile
- Add 'npm run jenkins' script

Close gh-3744
Fixes gh-1999

.travis.yml

@@ -5,3 +5,5 @@ node_js:
 - "6"
 - "8"
 - "9"
+addons:
+  chrome: stable

Gruntfile.js

@@ -147,6 +147,88 @@ module.exports = function( grunt ) {
 				"tween"
 			]
 		},
+		karma: {
+			options: {
+				customContextFile: "test/karma.context.html",
+				customDebugFile: "test/karma.debug.html",
+				frameworks: [ "qunit" ],
+				middleware: [ "mockserver" ],
+				plugins: [
+					"karma-*",
+					{
+						"middleware:mockserver": [
+							"factory",
+							require( "./test/middleware-mockserver.js" )
+						]
+					}
+				],
+				files: [
+					"test/data/jquery-1.9.1.js",
+					"external/qunit-assert-step/qunit-assert-step.js",
+					"external/sinon/sinon.js",
+					"external/npo/npo.js",
+					"external/requirejs/require.js",
+					"test/data/testinit.js",
+
+					"dist/jquery.min.js",
+
+					// Replacement for testinit.js#loadTests()
+					"test/data/testrunner.js",
+					"test/unit/basic.js",
+					"test/unit/core.js",
+					"test/unit/callbacks.js",
+					"test/unit/deferred.js",
+					"test/unit/deprecated.js",
+					"test/unit/support.js",
+					"test/unit/data.js",
+					"test/unit/queue.js",
+					"test/unit/attributes.js",
+					"test/unit/event.js",
+					"test/unit/selector.js",
+					"test/unit/traversing.js",
+					"test/unit/manipulation.js",
+					"test/unit/wrap.js",
+					"test/unit/css.js",
+					"test/unit/serialize.js",
+					"test/unit/ajax.js",
+					"test/unit/effects.js",
+					"test/unit/offset.js",
+					"test/unit/dimensions.js",
+					"test/unit/animation.js",
+					"test/unit/tween.js",
+					"test/unit/ready.js",
+
+					{ pattern: "dist/jquery.js", included: false, served: true },
+					{ pattern: "dist/*.map", included: false, served: true },
+					{ pattern: "external/qunit/qunit.css", included: false, served: true },
+					{
+						pattern: "test/**/*.@(js|css|jpg|html|xml)",
+						included: false,
+						served: true
+					}
+				],
+				reporters: [ "dots" ],
+				autoWatch: false,
+				concurrency: 3,
+				captureTimeout: 20 * 1000,
+
+				// To debug tests with Karma:
+				// - Run 'grunt karma:chrome' or 'grunt karma:firefox'
+				//   (any karma subtask that has singleRun=false)
+				// - Press "Debug" in the opened browser window.
+				singleRun: false
+			},
+			main: {
+				browsers: [ "ChromeHeadless" ],
+				singleRun: true
+			},
+			chrome: {
+				browsers: [ "Chrome" ]
+			},
+			firefox: {
+				browsers: [ "Firefox" ]
+			}
+		},
 		watch: {
 			files: [ "<%= eslint.dev.src %>" ],
 			tasks: [ "dev" ]
@@ -222,6 +304,7 @@ module.exports = function( grunt ) {
 		"newer:uglify",
 		"remove_map_comment",
 		"dist:*",
+		"qunit_fixture",
 		"compare_size"
 	] );
 
@@ -231,6 +314,7 @@ module.exports = function( grunt ) {
 		"uglify",
 		"remove_map_comment",
 		"dist:*",
+		"qunit_fixture",
 		"eslint:dist",
 		"test:fast",
 		"compare_size"

README.md

@@ -323,20 +323,20 @@ fireNative( jQuery("#elem")[0], "click" );
 ### Add random number to url to stop caching ###
 
 ```js
-url( "some/url.php" );
+url( "some/url" );
 ```
 
 Example:
 
 ```js
-url("data/test.html");
+url("index.html");
 
-=> "data/test.html?10538358428943"
+=> "data/index.html?10538358428943"
 
 
-url("data/test.php?foo=bar");
+url("mock.php?foo=bar");
 
-=> "data/test.php?foo=bar&10538358345554"
+=> "data/mock.php?foo=bar&10538358345554"
 ```
 
 

build/tasks/qunit_fixture.js

@@ -0,0 +1,22 @@
+var fs = require( "fs" );
+
+module.exports = function( grunt ) {
+	grunt.registerTask( "qunit_fixture", function() {
+		var dest = "./test/data/qunit-fixture.js";
+		fs.writeFileSync(
+			dest,
+			"// Generated by build/tasks/qunit_fixture.js\n" +
+			"QUnit.config.fixture = " +
+			JSON.stringify(
+				fs.readFileSync(
+					"./test/data/qunit-fixture.html",
+					"utf8"
+				).toString()
+			) +
+			";\n" +
+			"// Compat with QUnit 1.x:\n" +
+			"document.getElementById( \"qunit-fixture\" ).innerHTML = QUnit.config.fixture;\n"
+		);
+		grunt.log.ok( "Updated " + dest + "." );
+	} );
+};

external/qunit/qunit.css

@@ -1,12 +1,12 @@
 /*!
- * QUnit 1.20.0
- * http://qunitjs.com/
+ * QUnit 1.23.1
+ * https://qunitjs.com/
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license
- * http://jquery.org/license
+ * https://jquery.org/license
  *
- * Date: 2015-10-27T17:53Z
+ * Date: 2016-04-12T17:29Z
  */
 
 /** Font Family and Sizes */
@@ -120,6 +120,10 @@
 	display: list-item;
 }
 
+#qunit-tests.hidepass {
+	position: relative;
+}
+
 #qunit-tests.hidepass li.running,
 #qunit-tests.hidepass li.pass {
 	visibility: hidden;