First checked-in import of the W3C's test suites.

LayoutTests/imported/web-platform-tests/README.md

+Description
+===========
+
+This is the test suites from a number of W3C Working Groups, including the HTML
+Working Group, the Web Apps Working Group, the Device APIs Working Group, and
+the Web Apps Security Working Group.
+
+Running the Tests
+=================
+
+The tests are designed to be run from your local computer. The test environment
+requires Python 2.7+ (but not Python 3.x).
+
+To get the tests running, you need to set up the test domains in your 
+[`hosts` file](http://en.wikipedia.org/wiki/Hosts_%28file%29%23Location_in_the_file_system). The following entries are required:
+
+```
+127.0.0.1       web-platform.test
+127.0.0.1       www.web-platform.test
+127.0.0.1       www1.web-platform.test
+127.0.0.1       www2.web-platform.test
+127.0.0.1       xn--n8j6ds53lwwkrqhv28a.web-platform.test
+127.0.0.1       xn--lve-6lad.web-platform.test
+```
+
+Because web-platform-tests uses git submodules, you must ensure that
+these are up to date. In the root of your checkout, run:
+
+```
+git submodule update --init --recursive
+```
+
+The test environment can then be started using
+
+```
+python serve.py
+```
+
+This will start HTTP servers on two ports and a websockets server on
+one port. By default one web server starts on port 8000 and the other
+ports are randomly-chosen free ports. Tests must be loaded from the
+*first* HTTP server in the output. To change the ports, edit the
+`config.json` file, for example, replacing the part that reads:
+
+```
+"http": [8000, "auto"]
+```
+
+to some port of your choice e.g.
+
+```
+"http":[1234, "auto"]
+```
+
+Test Runner
+===========
+
+There is a test runner that is designed to provide a
+convenient way to run the web-platform tests in-browser. It will run
+testharness.js tests automatically but requires manual work for
+reftests and manual tests.
+
+In order to use the runner, it is first necessary to generate a test
+manifest. This must be called `MANIFEST.json` and placed in the
+web-platform-tests root.
+
+You must do this step to use the test runner, even if you are not
+creating a new test suite.
+
+To generate this file, from a command prompt at the root
+directory of the repo, run:
+
+```
+python tools/scripts/manifest.py
+```
+This `tools/scripts/manifest.py` needs python `html5lib` package.
+If you have not installed it yet, run:
+```
+pip install html5lib
+```
+
+On Mac OS X, python is installed with Xcode, but pip is not. Try
+```
+sudo easy_install pip
+```
+if pip is not already on your system.
+
+
+Running the tests requires that the test environment be activated as
+described above. The runner can be found at `/tools/runner/index.html`
+on the local server i.e.
+
+```
+http://web-platform.test:8000/tools/runner/index.html
+```
+
+in the default configuration.
+
+Publication
+===========
+
+The master branch is automatically synced to http://w3c-test.org/.
+
+Pull requests that have been checked are automatically mirrored to
+http://w3c-test.org/submissions/.
+
+Finding Things
+==============
+
+Each top-level directory represents a W3C specification: the name
+matches the shortname used after the canonical address of the said
+specification under http://www.w3.org/TR/ .
+
+For some of the specifications, the tree under the top-level directory
+represents the sections of the respective documents, using the section
+IDs for directory names, with a maximum of three levels deep.
+
+So if you're looking for tests in HTML for "The History interface",
+they will be under `html/browsers/history/the-history-interface/`.
+
+Various resources that tests depend on are in `common`, `images`, and
+`fonts`.
+
+
+If you're looking at a section of the specification and can't figure
+out where the directory is for it in the tree, just run:
+
+```
+node tools/scripts/id2path.js your-id
+```
+
+Branches
+========
+
+In the vast majority of cases the **only** branch that you should need
+to care about is `master`.
+
+There is another branch called `CR`. This is a strict subset of
+`master` that is limited to features that are found in the Candidate
+Recommendation version of the relevant specifications.
+
+If you see other branches in the repository, you can generally safely
+ignore them. Please note that branches prefixed with `temp/` are
+temporary branches and **can** get deleted at some point. So don't
+base any work off them unless you want to see your work destroyed.
+
+Contributing
+============
+
+Save the Web, Write Some Tests!
+
+Absolutely everyone is welcome (and even encouraged) to contribute to
+test development, so long as you fulfill the contribution requirements
+detailed in the [Contributing Guidelines][contributing]. No test is
+too small or too simple, especially if it corresponds to something for
+which you've noted an interoperability bug in a browser.
+
+The way to contribute is just as usual:
+
+* fork this repository (and make sure you're still relatively in sync
+  with it if you forked a while ago);
+* create a branch for your changes:
+  `git checkout -b your-name/topic`;
+* make your changes;
+* push that to your repo;
+* and send in a pull request based on the above.
+
+Please make your pull requests either to `master` or to a feature
+branch (but not to `CR`).
+
+We can sometimes take a little while to go through pull requests
+because we have to go through all the tests and ensure that they match
+the specification correctly. But we look at all of them, and take
+everything that we can.
+
+If you wish to contribute actively, you're very welcome to join the
+public-test-infra@w3.org mailing list (low traffic) by
+[signing up to our mailing list](mailto:public-test-infra-request@w3.org?subject=subscribe).
+
+Join us on irc #testing ([irc.w3.org][ircw3org], port 6665). The channel
+is [archived][ircarchive].
+
+[contributing]: https://github.com/w3c/web-platform-tests/blob/master/CONTRIBUTING.md
+[ircw3org]: https://www.w3.org/wiki/IRC
+[ircarchive]: http://krijnhoetmer.nl/irc-logs/testing/
+
+Documentation
+-------------
+
+* [How to write and review tests](http://testthewebforward.org/docs/)
+* [Documentation for the wptserve server](http://wptserve.readthedocs.org/en/latest/)