Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 105 insertions, 0 deletions

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+JS Test Suite Readme
+====================
+
+The JS test suite is a fairly extensive collection of correctness and regression
+tests for the Spidermonkey engine. Two harnesses run these tests: the shell test
+harness in this directory and the "reftest" harness built into the browser, used
+in continuous integration. The browser reftests require additional manifest files; these are
+generated automatically by the build phase 'package-tests' using the
+'--make-manifests' option to jstests.py.
+
+Running tests
+-------------
+See
+https://developer.mozilla.org/en-US/docs/SpiderMonkey/Running_Automated_JavaScript_Tests
+
+
+Creating a test
+---------------
+For general information, see
+https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Creating_JavaScript_tests/jsreftests
+
+
+Adding a test
+-------------
+    Drop your test file in an appropriate directory under js/src/tests/non262/.
+
+        <fineprint> Some names are forbidden. Do not name your test browser.js,
+        shell.js, template.js, user.js, js-test-driver-begin.js, or
+        js-test-driver-end.js.
+        </fineprint>
+
+
+Test262, ECMAScript conformance tests
+-------------------------------------
+
+    js/src/tests/test262/ contains a snapshot of the ECMAScript
+    conformance test suite: https://github.com/tc39/test262.
+
+    We periodically update the snapshot, but it's a manual process:
+
+    1.  File a bug, modeled after bug 1560206, to announce your intent to
+        update the test suite.
+
+    2.  Run `test262-update.py`.
+
+    3.  Run the tests.
+
+    4.  Look at each failing test and either add an entry to the
+        `UNSUPPORTED_FEATURES` list in `test262-update.py`
+        or add a `skip script` entry to jstests.list, filing a bug if needed.
+        (Every skipped test should be associated with an open bug.)
+
+    5.  Repeat steps 2-4 until there are no failing tests.
+
+    6.  Post patches (as in bug 1560206).
+
+    When implementing a new feature, it is useful to enable tests for a
+    previously unsupported feature without going through all the steps
+    above. Here's how to do that:
+
+    1.  Delete an entry from `UNSUPPORTED_FEATURES` in `test262-update.py`.
+
+    2.  Run `./test262-update.py --revision $(head -n 1 test262/GIT-INFO | awk '{print $2}')`.
+
+        (This re-runs the script using the revision of test262 we most recently used,
+        instead of the latest revision.)
+
+    3.  Run the tests.
+
+    To export tests to the test262 format, for potential contribution to
+    test262, see `test262-export.py`.
+
+
+Adjusting when and how a test runs
+----------------------------------
+    If the test is a test262 test, do this by editing jstests.list.
+    (The procedure below would be a bad idea because the test files are
+    autogenerated from the upstream test262 repository.)
+
+    Otherwise, put a comment at the top of the header matching the format:
+        // |reftest| <failure-type> -- <comment>
+
+    Where <failure-type> is a standard reftest <failure-type> string, as documented by:
+        http://searchfox.org/mozilla-central/source/layout/tools/reftest/README.txt
+
+    Example:
+        // |reftest| skip-if(!xulRuntime.shell) -- does not always dismiss alert
+
+        <fineprint> Either // or /* */ style comments may be used. The entire
+        comment must appear in the first 512 bytes of the file. The control
+        string must be in its own comment block. </fineprint>
+
+    When adding such comments to individual files is not feasible (e.g., for
+    imported tests), reftest manifest entries can be added to jstests.list
+    instead. Combining in-file comments with entries in this manifest file for
+    the same files is not supported (the one from the manifest file will be
+    used). Only the following two forms are supported:
+        <failure-type> include <relative_path>
+        <failure-type> script <relative_path>
+        include <relative_path>
+    The <type> "include" indicates that <failure-type> should apply to all test
+    cases within a directory. A statement for a nested directory or script
+    overrides one for an enclosing directory. The <type> "include" without a
+    <failure-type> recursively loads another jstests.list file for further
+    processing.