7 Many test suites have their test metadata defined in files called
10 Test manifests are divided into two flavors: :ref:`manifestparser_manifests`
11 and :ref:`reftest_manifests`.
16 The build system does not enforce file naming for test manifest files.
17 However, the following convention is used.
20 For the *plain* flavor of mochitests.
23 For the *chrome* flavor of mochitests.
26 For the *browser chrome* flavor of mochitests.
29 For the *a11y* flavor of mochitests.
34 .. _manifestparser_manifests:
36 ManifestParser Manifests
37 ==========================
39 ManifestParser manifests are essentially ini files that conform to a basic
42 The :doc:`reference documentation </mozbase/manifestparser>`
43 for manifestparser manifests describes the basic format of test manifests.
45 In summary, manifests are ini files with section names describing test files::
50 Keys under sections can hold metadata about each test::
55 skip-if = os == "linux" && debug
57 fail-if = os == "mac" || os == "android"
59 There is a special **DEFAULT** section whose keys/metadata apply to all
67 In the above example, **test_foo.js** inherits the metadata **property = value**
68 from the **DEFAULT** section.
73 Test manifests can define some common keys/metadata to influence behavior.
74 Those keys are as follows:
77 List of files that will be executed before the test file. (Used in
81 List of files that will be executed after the test file. (Used in
85 List of additional files required to run tests. This is typically
86 defined in the **DEFAULT** section.
88 Unlike other file lists, *support-files* supports a globbing mechanism
89 to facilitate pulling in many files with minimal typing. This globbing
90 mechanism is activated if an entry in this value contains a ``*``
91 character. A single ``*`` will wildcard match all files in a directory.
92 A double ``**`` will descend into child directories. For example,
93 ``data/*`` will match ``data/foo`` but not ``data/subdir/bar`` where
94 ``data/**`` will match ``data/foo`` and ``data/subdir/bar``.
96 Support files starting with ``/`` are placed in a root directory, rather
97 than a location determined by the manifest location. For mochitests,
98 this allows for the placement of files at the server root. The source
99 file is selected from the base name (e.g., ``foo`` for ``/path/foo``).
100 Files starting with ``/`` cannot be selected using globbing.
102 Some support files are used by tests across multiple directories. In
103 this case, a test depending on a support file from another directory
104 must note that dependency with the path to the required support file
105 in its own **support-files** entry. These use a syntax where paths
106 starting with ``!/`` will indicate the beginning of the path to a
107 shared support file starting from the root of the srcdir. For example,
108 if a manifest at ``dom/base/test/mochitest.ini`` has a support file,
109 ``dom/base/test/server-script.sjs``, and a mochitest in
110 ``dom/workers/test`` depends on that support file, the test manifest
111 at ``dom/workers/test/mochitest.ini`` must include
112 ``!/dom/base/test/server-script.sjs`` in its **support-files** entry.
115 List of files that are generated as part of the build and don't exist in
118 The build system assumes that each manifest file, test file, and file
119 listed in **head**, **tail**, and **support-files** is static and
120 provided by the source tree (and not automatically generated as part
121 of the build). This variable tells the build system not to make this
124 This variable will likely go away sometime once all generated files are
125 accounted for in the build config.
127 If a generated file is not listed in this key, a clobber build will
131 Record that this manifest duplicates another manifest.
133 The common scenario is two manifest files will include a shared
134 manifest file via the ``[include:file]`` special section. The build
135 system enforces that each test file is only provided by a single
136 manifest. Having this key present bypasses that check.
138 The value of this key is ignored.
141 Skip this test if the specified condition is true.
142 See :ref:`manifest_filter_language`.
144 Conditions can be specified on multiple lines, where each line is implicitly
145 joined by a logical OR (``||``). This makes it easier to add comments to
146 distinct failures. For example:
152 os == "mac" && fission # bug 123 - fails on fission
153 os == "windows" && debug # bug 456 - hits an assertion
156 Expect test failure if the specified condition is true.
157 See :ref:`manifest_filter_language`.
159 Conditions can be specified on multiple lines (see ``skip-if``).
162 If present, the test should not be run in parallel with other tests.
164 Some test harnesses support parallel test execution on separate processes
165 and/or threads (behavior varies by test harness). If this key is present,
166 the test harness should not attempt to run this test in parallel with any
169 By convention, the value of this key is a string describing why the test
170 can't be run in parallel.
173 Changes the scheme and domain from which the test runs. (Only used in mochitest suites)
175 There are two possible values:
176 - ``http`` (default): The test will run from http://mochi.test:8888
177 - ``https``: The test will run from https://example.com:443
179 .. _manifest_filter_language:
181 Manifest Filter Language
182 ------------------------
184 Some manifest keys accept a special filter syntax as their values. These
185 values are essentially boolean expressions that are evaluated at test
188 The expressions can reference a well-defined set of variables, such as
189 ``os`` and ``debug``. These variables are populated from the
190 ``mozinfo.json`` file. For the full list of available variables, see
191 the :ref:`mozinfo documentation <mozinfo_attributes>`.
194 `the source <https://hg.mozilla.org/mozilla-central/file/default/testing/mozbase/manifestparser/manifestparser/manifestparser.py>`_ for the full documentation of the
195 expression syntax until it is documented here.
199 Document manifest filter language.
201 .. _manifest_file_installation:
206 Files referenced by manifests are automatically installed into the object
207 directory into paths defined in
208 :py:func:`mozbuild.frontend.emitter.TreeMetadataEmitter._process_test_manifest`.
210 Relative paths resolving to parent directory (e.g.
211 ``support-files = ../foo.txt`` have special behavior.
213 For ``support-files``, the file will be installed to the default destination
214 for that manifest. Only the file's base name is used to construct the final
215 path: directories are irrelevant. Files starting with ``/`` are an exception,
216 these are installed relative to the root of the destination; the base name is
217 instead used to select the file..
219 For all other entry types, the file installation is skipped.
221 .. _reftest_manifests:
226 See `MDN <https://developer.mozilla.org/en-US/docs/Creating_reftest-based_unit_tests>`_.