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Revision as of 12:38, 3 March 2009 by SylvainPasche (talk | contribs) (Test metadata and automation)

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Existing tests URI: http://dev.w3.org/html5/tests/


  • Each test needs a "reviewed" marker of some sort
  • It must be easy to find tests where the spec has changed under them
  • The barrier to contribution must be as low as possible
  • Testcases should have somewhat stable URIs
  • If test can be done using JavaScript preferably require it to be in JavaScript so engines can be more efficiently tested (i.e. automated).
  • It must be easy to review tests
  • Standardize a test format?


  • There does not need to be a single consistent test harness for the whole of HTML5. (When sections can be tested in isolation, each section should use a test harness that is suited to that section's testing requirements. E.g. there is little value in fitting canvas tests and parser tests into the same framework, and it may add a lot of complexity.)

Tests metadata

Having a standardized way of specifying tests metadata could be helpful. In particular, they should contain information about:

  • What part of the specification the test is related to.
  • Requirements for running the tests, that could be expressed as flags.

The CSS Test suite defines a format for specifying test metadata that could be used: http://wiki.csswg.org/test/css2.1/format.

Testcase metadata sample (from http://samples.msdn.microsoft.com/IETestCenter/HTML5/DOMStorage/localStorage_clear.htm):

       <title>HTML 5 Test Suite: localStorage API - clear()</title>
       <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
       <link rel="help" href="http://www.w3.org/html/wg/html5/#structured-client-side-storage" />
       <meta name="assert" content=" - The clear() method must atomically cause the list associated with the object to be emptied of all key/value pairs, if there are any." />


Test cases should be able to run automatically whenever possible for several reasons:

  • No need to run the test manually, which can saves time and produce more reliable results.
  • Browser vendors can integrate the test in their automated regression harnesses.

The Browser Tests project uses 3 formats that could be used for automated tests. They are based on automated tests from WebKit and Mozilla and are documented here: http://code.google.com/p/browsertests/wiki/StartPage#Tests_Format

Existing tests