import os
import textwrap
from optparse import OptionConflictError
from warnings import warn
from nose.util import tolist
class Plugin(object):
"""Base class for nose plugins. It's recommended but not *necessary* to
subclass this class to create a plugin, but all plugins *must* implement
`options(self, parser, env)` and `configure(self, options, conf)`, and
must have the attributes `enabled`, `name` and `score`. The `name`
attribute may contain hyphens ('-').
Plugins should not be enabled by default.
Subclassing Plugin (and calling the superclass methods in
__init__, configure, and options, if you override them) will give
your plugin some friendly default behavior:
* A --with-$name option will be added to the command line interface
to enable the plugin, and a corresponding environment variable
will be used as the default value. The plugin class's docstring
will be used as the help for this option.
* The plugin will not be enabled unless this option is selected by
the user.
"""
can_configure = False
enabled = False
enableOpt = None
name = None
score = 100
def __init__(self):
if self.name is None:
self.name = self.__class__.__name__.lower()
if self.enableOpt is None:
self.enableOpt = "enable_plugin_%s" % self.name.replace('-', '_')
def addOptions(self, parser, env=None):
"""Add command-line options for this plugin.
The base plugin class adds --with-$name by default, used to enable the
plugin.
.. warning :: Don't implement addOptions unless you want to override
all default option handling behavior, including
warnings for conflicting options. Implement
:meth:`options
<nose.plugins.base.IPluginInterface.options>`
instead.
"""
self.add_options(parser, env)
def add_options(self, parser, env=None):
"""Non-camel-case version of func name for backwards compatibility.
.. warning ::
DEPRECATED: Do not use this method,
use :meth:`options <nose.plugins.base.IPluginInterface.options>`
instead.
"""
# FIXME raise deprecation warning if wasn't called by wrapper
if env is None:
env = os.environ
try:
self.options(parser, env)
self.can_configure = True
except OptionConflictError, e:
warn("Plugin %s has conflicting option string: %s and will "
"be disabled" % (self, e), RuntimeWarning)
self.enabled = False
self.can_configure = False
def options(self, parser, env):
"""Register commandline options.
Implement this method for normal options behavior with protection from
OptionConflictErrors. If you override this method and want the default
--with-$name option to be registered, be sure to call super().
"""
env_opt = 'NOSE_WITH_%s' % self.name.upper()
env_opt = env_opt.replace('-', '_')
parser.add_option("--with-%s" % self.name,
action="store_true",
dest=self.enableOpt,
default=env.get(env_opt),
help="Enable plugin %s: %s [%s]" %
(self.__class__.__name__, self.help(), env_opt))
def configure(self, options, conf):
"""Configure the plugin and system, based on selected options.
The base plugin class sets the plugin to enabled if the enable option
for the plugin (self.enableOpt) is true.
"""
if not self.can_configure:
return
self.conf = conf
if hasattr(options, self.enableOpt):
self.enabled = getattr(options, self.enableOpt)
def help(self):
"""Return help for this plugin. This will be output as the help
section of the --with-$name option that enables the plugin.
"""
if self.__class__.__doc__:
# doc sections are often indented; compress the spaces
return textwrap.dedent(self.__class__.__doc__)
return "(no help available)"
# Compatiblity shim
def tolist(self, val):
warn("Plugin.tolist is deprecated. Use nose.util.tolist instead",
DeprecationWarning)
return tolist(val)
class IPluginInterface(object):
"""
IPluginInterface describes the plugin API. Do not subclass or use this
class directly.
"""
def __new__(cls, *arg, **kw):
raise TypeError("IPluginInterface class is for documentation only")
def addOptions(self, parser, env):
"""Called to allow plugin to register command-line options with the
parser. DO NOT return a value from this method unless you want to stop
all other plugins from setting their options.
.. warning ::
DEPRECATED -- implement
:meth:`options <nose.plugins.base.IPluginInterface.options>` instead.
"""
pass
add_options = addOptions
add_options.deprecated = True
def addDeprecated(self, test):
"""Called when a deprecated test is seen. DO NOT return a value
unless you want to stop other plugins from seeing the deprecated
test.
.. warning :: DEPRECATED -- check error class in addError instead
"""
pass
addDeprecated.deprecated = True
def addError(self, test, err):
"""Called when a test raises an uncaught exception. DO NOT return a
value unless you want to stop other plugins from seeing that the
test has raised an error.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
addError.changed = True
def addFailure(self, test, err):
"""Called when a test fails. DO NOT return a value unless you
want to stop other plugins from seeing that the test has failed.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: 3-tuple
:type err: sys.exc_info() tuple
"""
pass
addFailure.changed = True
def addSkip(self, test):
"""Called when a test is skipped. DO NOT return a value unless
you want to stop other plugins from seeing the skipped test.
.. warning:: DEPRECATED -- check error class in addError instead
"""
pass
addSkip.deprecated = True
def addSuccess(self, test):
"""Called when a test passes. DO NOT return a value unless you
want to stop other plugins from seeing the passing test.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
addSuccess.changed = True
def afterContext(self):
"""Called after a context (generally a module) has been
lazy-loaded, imported, setup, had its tests loaded and
executed, and torn down.
"""
pass
afterContext._new = True
def afterDirectory(self, path):
"""Called after all tests have been loaded from directory at path
and run.
:param path: the directory that has finished processing
:type path: string
"""
pass
afterDirectory._new = True
def afterImport(self, filename, module):
"""Called after module is imported from filename. afterImport
is called even if the import failed.
:param filename: The file that was loaded
:type filename: string
:param module: The name of the module
:type module: string
"""
pass
afterImport._new = True
def afterTest(self, test):
"""Called after the test has been run and the result recorded
(after stopTest).
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
afterTest._new = True
def beforeContext(self):
"""Called before a context (generally a module) is
examined. Because the context is not yet loaded, plugins don't
get to know what the context is; so any context operations
should use a stack that is pushed in `beforeContext` and popped
in `afterContext` to ensure they operate symmetrically.
`beforeContext` and `afterContext` are mainly useful for tracking
and restoring global state around possible changes from within a
context, whatever the context may be. If you need to operate on
contexts themselves, see `startContext` and `stopContext`, which
are passed the context in question, but are called after
it has been loaded (imported in the module case).
"""
pass
beforeContext._new = True
def beforeDirectory(self, path):
"""Called before tests are loaded from directory at path.
:param path: the directory that is about to be processed
"""
pass
beforeDirectory._new = True
def beforeImport(self, filename, module):
"""Called before module is imported from filename.
:param filename: The file that will be loaded
:param module: The name of the module found in file
:type module: string
"""
beforeImport._new = True
def beforeTest(self, test):
"""Called before the test is run (before startTest).
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
beforeTest._new = True
def begin(self):
"""Called before any tests are collected or run. Use this to
perform any setup needed before testing begins.
"""
pass
def configure(self, options, conf):
"""Called after the command line has been parsed, with the
parsed options and the config container. Here, implement any
config storage or changes to state or operation that are set
by command line options.
DO NOT return a value from this method unless you want to
stop all other plugins from being configured.
"""
pass
def finalize(self, result):
"""Called after all report output, including output from all
plugins, has been sent to the stream. Use this to print final
test results or perform final cleanup. Return None to allow
other plugins to continue printing, or any other value to stop
them.
:param result: test result object
.. Note:: When tests are run under a test runner other than
:class:`nose.core.TextTestRunner`, such as
via ``python setup.py test``, this method may be called
**before** the default report output is sent.
"""
pass
def describeTest(self, test):
"""Return a test description.
Called by :meth:`nose.case.Test.shortDescription`.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
describeTest._new = True
def formatError(self, test, err):
"""Called in result.addError, before plugin.addError. If you
want to replace or modify the error tuple, return a new error
tuple, otherwise return err, the original error tuple.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
formatError._new = True
formatError.chainable = True
# test arg is not chainable
formatError.static_args = (True, False)
def formatFailure(self, test, err):
"""Called in result.addFailure, before plugin.addFailure. If you
want to replace or modify the error tuple, return a new error
tuple, otherwise return err, the original error tuple.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
formatFailure._new = True
formatFailure.chainable = True
# test arg is not chainable
formatFailure.static_args = (True, False)
def handleError(self, test, err):
"""Called on addError. To handle the error yourself and prevent normal
error processing, return a true value.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
handleError._new = True
def handleFailure(self, test, err):
"""Called on addFailure. To handle the failure yourself and
prevent normal failure processing, return a true value.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
handleFailure._new = True
def loadTestsFromDir(self, path):
"""Return iterable of tests from a directory. May be a
generator. Each item returned must be a runnable
unittest.TestCase (or subclass) instance or suite instance.
Return None if your plugin cannot collect any tests from
directory.
:param path: The path to the directory.
"""
pass
loadTestsFromDir.generative = True
loadTestsFromDir._new = True
def loadTestsFromModule(self, module, path=None):
"""Return iterable of tests in a module. May be a
generator. Each item returned must be a runnable
unittest.TestCase (or subclass) instance.
Return None if your plugin cannot
collect any tests from module.
:param module: The module object
:type module: python module
:param path: the path of the module to search, to distinguish from
namespace package modules
.. note::
NEW. The ``path`` parameter will only be passed by nose 0.11
or above.
"""
pass
loadTestsFromModule.generative = True
def loadTestsFromName(self, name, module=None, importPath=None):
"""Return tests in this file or module. Return None if you are not able
to load any tests, or an iterable if you are. May be a
generator.
:param name: The test name. May be a file or module name plus a test
callable. Use split_test_name to split into parts. Or it might
be some crazy name of your own devising, in which case, do
whatever you want.
:param module: Module from which the name is to be loaded
:param importPath: Path from which file (must be a python module) was
found
.. warning:: DEPRECATED: this argument will NOT be passed.
"""
pass
loadTestsFromName.generative = True
def loadTestsFromNames(self, names, module=None):
"""Return a tuple of (tests loaded, remaining names). Return
None if you are not able to load any tests. Multiple plugins
may implement loadTestsFromNames; the remaining name list from
each will be passed to the next as input.
:param names: List of test names.
:type names: iterable
:param module: Module from which the names are to be loaded
"""
pass
loadTestsFromNames._new = True
loadTestsFromNames.chainable = True
def loadTestsFromFile(self, filename):
"""Return tests in this file. Return None if you are not
interested in loading any tests, or an iterable if you are and
can load some. May be a generator. *If you are interested in
loading tests from the file and encounter no errors, but find
no tests, yield False or return [False].*
.. Note:: This method replaces loadTestsFromPath from the 0.9
API.
:param filename: The full path to the file or directory.
"""
pass
loadTestsFromFile.generative = True
loadTestsFromFile._new = True
def loadTestsFromPath(self, path):
"""
.. warning:: DEPRECATED -- use loadTestsFromFile instead
"""
pass
loadTestsFromPath.deprecated = True
def loadTestsFromTestCase(self, cls):
"""Return tests in this test case class. Return None if you are
not able to load any tests, or an iterable if you are. May be a
generator.
:param cls: The test case class. Must be subclass of
:class:`unittest.TestCase`.
"""
pass
loadTestsFromTestCase.generative = True
def loadTestsFromTestClass(self, cls):
"""Return tests in this test class. Class will *not* be a
unittest.TestCase subclass. Return None if you are not able to
load any tests, an iterable if you are. May be a generator.
:param cls: The test case class. Must be **not** be subclass of
:class:`unittest.TestCase`.
"""
pass
loadTestsFromTestClass._new = True
loadTestsFromTestClass.generative = True
def makeTest(self, obj, parent):
"""Given an object and its parent, return or yield one or more
test cases. Each test must be a unittest.TestCase (or subclass)
instance. This is called before default test loading to allow
plugins to load an alternate test case or cases for an
object. May be a generator.
:param obj: The object to be made into a test
:param parent: The parent of obj (eg, for a method, the class)
"""
pass
makeTest._new = True
makeTest.generative = True
def options(self, parser, env):
"""Called to allow plugin to register command line
options with the parser.
DO NOT return a value from this method unless you want to stop
all other plugins from setting their options.
:param parser: options parser instance
:type parser: :class:`ConfigParser.ConfigParser`
:param env: environment, default is os.environ
"""
pass
options._new = True
def prepareTest(self, test):
"""Called before the test is run by the test runner. Please
note the article *the* in the previous sentence: prepareTest
is called *only once*, and is passed the test case or test
suite that the test runner will execute. It is *not* called
for each individual test case. If you return a non-None value,
that return value will be run as the test. Use this hook to
wrap or decorate the test with another function. If you need
to modify or wrap individual test cases, use `prepareTestCase`
instead.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def prepareTestCase(self, test):
"""Prepare or wrap an individual test case. Called before
execution of the test. The test passed here is a
nose.case.Test instance; the case to be executed is in the
test attribute of the passed case. To modify the test to be
run, you should return a callable that takes one argument (the
test result object) -- it is recommended that you *do not*
side-effect the nose.case.Test instance you have been passed.
Keep in mind that when you replace the test callable you are
replacing the run() method of the test case -- including the
exception handling and result calls, etc.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
prepareTestCase._new = True
def prepareTestLoader(self, loader):
"""Called before tests are loaded. To replace the test loader,
return a test loader. To allow other plugins to process the
test loader, return None. Only one plugin may replace the test
loader. Only valid when using nose.TestProgram.
:param loader: :class:`nose.loader.TestLoader`
(or other loader) instance
"""
pass
prepareTestLoader._new = True
def prepareTestResult(self, result):
"""Called before the first test is run. To use a different
test result handler for all tests than the given result,
return a test result handler. NOTE however that this handler
will only be seen by tests, that is, inside of the result
proxy system. The TestRunner and TestProgram -- whether nose's
or other -- will continue to see the original result
handler. For this reason, it is usually better to monkeypatch
the result (for instance, if you want to handle some
exceptions in a unique way). Only one plugin may replace the
result, but many may monkeypatch it. If you want to
monkeypatch and stop other plugins from doing so, monkeypatch
and return the patched result.
:param result: :class:`nose.result.TextTestResult`
(or other result) instance
"""
pass
prepareTestResult._new = True
def prepareTestRunner(self, runner):
"""Called before tests are run. To replace the test runner,
return a test runner. To allow other plugins to process the
test runner, return None. Only valid when using nose.TestProgram.
:param runner: :class:`nose.core.TextTestRunner`
(or other runner) instance
"""
pass
prepareTestRunner._new = True
def report(self, stream):
"""Called after all error output has been printed. Print your
plugin's report to the provided stream. Return None to allow
other plugins to print reports, any other value to stop them.
:param stream: stream object; send your output here
:type stream: file-like object
"""
pass
def setOutputStream(self, stream):
"""Called before test output begins. To direct test output to a
new stream, return a stream object, which must implement a
`write(msg)` method. If you only want to note the stream, not
capture or redirect it, then return None.
:param stream: stream object; send your output here
:type stream: file-like object
"""
def startContext(self, context):
"""Called before context setup and the running of tests in the
context. Note that tests have already been *loaded* from the
context before this call.
:param context: the context about to be setup. May be a module or
class, or any other object that contains tests.
"""
pass
startContext._new = True
def startTest(self, test):
"""Called before each test is run. DO NOT return a value unless
you want to stop other plugins from seeing the test start.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def stopContext(self, context):
"""Called after the tests in a context have run and the
context has been torn down.
:param context: the context that has been torn down. May be a module or
class, or any other object that contains tests.
"""
pass
stopContext._new = True
def stopTest(self, test):
"""Called after each test is run. DO NOT return a value unless
you want to stop other plugins from seeing that the test has stopped.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def testName(self, test):
"""Return a short test name. Called by `nose.case.Test.__str__`.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
testName._new = True
def wantClass(self, cls):
"""Return true if you want the main test selector to collect
tests from this class, false if you don't, and None if you don't
care.
:param cls: The class being examined by the selector
"""
pass
def wantDirectory(self, dirname):
"""Return true if you want test collection to descend into this
directory, false if you do not, and None if you don't care.
:param dirname: Full path to directory being examined by the selector
"""
pass
def wantFile(self, file):
"""Return true if you want to collect tests from this file,
false if you do not and None if you don't care.
Change from 0.9: The optional package parameter is no longer passed.
:param file: Full path to file being examined by the selector
"""
pass
def wantFunction(self, function):
"""Return true to collect this function as a test, false to
prevent it from being collected, and None if you don't care.
:param function: The function object being examined by the selector
"""
pass
def wantMethod(self, method):
"""Return true to collect this method as a test, false to
prevent it from being collected, and None if you don't care.
:param method: The method object being examined by the selector
:type method: unbound method
"""
pass
def wantModule(self, module):
"""Return true if you want to collection to descend into this
module, false to prevent the collector from descending into the
module, and None if you don't care.
:param module: The module object being examined by the selector
:type module: python module
"""
pass
def wantModuleTests(self, module):
"""
.. warning:: DEPRECATED -- this method will not be called, it has
been folded into wantModule.
"""
pass
wantModuleTests.deprecated = True
|
