Revert all invocation-fixtures code
Due to a serious regression found in #1794, it was decided to pull off invocation features from 3.0 so it can be (hopefully) re-introduced in 3.1
This commit is contained in:
Bruno Oliveira
parent
4ab2e57ebd
commit
707b6b5e3f
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@ -143,13 +143,6 @@ time or change existing behaviors in order to make them less surprising/more use
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never fail because tuples are always truthy and are usually a mistake
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(see `#1562`_). Thanks `@kvas-it`_, for the PR.
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* Experimentally introduce new ``"invocation"`` fixture scope. At invocation scope a
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fixture function is cached in the same way as the fixture or test function that requests it.
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You can now use the builtin ``monkeypatch`` fixture from ``session``-scoped fixtures
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where previously you would get an error that you can not use a ``function``-scoped fixture from a
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``session``-scoped one.*
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Thanks `@nicoddemus`_ for the PR.
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* Allow passing a custom debugger class (e.g. ``--pdbcls=IPython.core.debugger:Pdb``).
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Thanks to `@anntzer`_ for the PR.
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@ -274,10 +274,8 @@ class FixtureRequest(FuncargnamesCompatAttr):
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self.fixturename = None
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#: Scope string, one of "function", "class", "module", "session"
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self.scope = "function"
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# rename both attributes below because their key has changed; better an attribute error
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# than subtle key misses; also backward incompatibility
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self._fixture_values = {} # (argname, scope) -> fixture value
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self._fixture_defs = {} # (argname, scope) -> FixtureDef
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self._fixture_values = {} # argname -> fixture value
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self._fixture_defs = {} # argname -> FixtureDef
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fixtureinfo = pyfuncitem._fixtureinfo
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self._arg2fixturedefs = fixtureinfo.name2fixturedefs.copy()
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self._arg2index = {}
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@ -294,31 +292,20 @@ class FixtureRequest(FuncargnamesCompatAttr):
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return self._getscopeitem(self.scope)
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def _getnextfixturedef(self, argname, scope):
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def trygetfixturedefs(argname):
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def _getnextfixturedef(self, argname):
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fixturedefs = self._arg2fixturedefs.get(argname, None)
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if fixturedefs is None:
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fixturedefs = self._arg2fixturedefs.get(argname + ':' + scope, None)
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return fixturedefs
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fixturedefs = trygetfixturedefs(argname)
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if fixturedefs is None:
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# we arrive here because of a a dynamic call to
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# getfixturevalue(argname) usage which was naturally
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# not known at parsing/collection time
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parentid = self._pyfuncitem.parent.nodeid
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fixturedefs = self._fixturemanager.getfixturedefs(argname, parentid)
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if fixturedefs:
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self._arg2fixturedefs[argname] = fixturedefs
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fixturedefs_by_argname = self._fixturemanager.getfixturedefs_multiple_scopes(argname, parentid)
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if fixturedefs_by_argname:
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self._arg2fixturedefs.update(fixturedefs_by_argname)
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fixturedefs = trygetfixturedefs(argname)
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# fixturedefs list is immutable so we maintain a decreasing index
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index = self._arg2index.get((argname, scope), 0) - 1
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index = self._arg2index.get(argname, 0) - 1
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if fixturedefs is None or (-index > len(fixturedefs)):
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raise FixtureLookupError(argname, self)
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self._arg2index[(argname, scope)] = index
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self._arg2index[argname] = index
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return fixturedefs[index]
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@property
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@ -458,10 +445,10 @@ class FixtureRequest(FuncargnamesCompatAttr):
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def _get_active_fixturedef(self, argname):
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try:
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return self._fixture_defs[(argname, self.scope)]
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return self._fixture_defs[argname]
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except KeyError:
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try:
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fixturedef = self._getnextfixturedef(argname, self.scope)
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fixturedef = self._getnextfixturedef(argname)
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except FixtureLookupError:
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if argname == "request":
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class PseudoFixtureDef:
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@ -472,8 +459,8 @@ class FixtureRequest(FuncargnamesCompatAttr):
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# remove indent to prevent the python3 exception
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# from leaking into the call
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result = self._getfixturevalue(fixturedef)
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self._fixture_values[(argname, self.scope)] = result
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self._fixture_defs[(argname, self.scope)] = fixturedef
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self._fixture_values[argname] = result
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self._fixture_defs[argname] = fixturedef
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return fixturedef
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def _get_fixturestack(self):
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@ -615,16 +602,6 @@ def scopemismatch(currentscope, newscope):
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return scopes.index(newscope) > scopes.index(currentscope)
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def strip_invocation_scope_suffix(name):
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"""Remove the invocation-scope suffix from the given name.
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Invocation scope fixtures have their scope in the name of the fixture.
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For example, "monkeypatch:session". This function strips the suffix
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returning the user-frienldy name of the fixture.
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"""
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return name.split(':')[0]
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class FixtureLookupError(LookupError):
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""" could not return a requested Fixture (missing or invalid). """
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def __init__(self, argname, request, msg=None):
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@ -664,7 +641,6 @@ class FixtureLookupError(LookupError):
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parentid = self.request._pyfuncitem.parent.nodeid
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for name, fixturedefs in fm._arg2fixturedefs.items():
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faclist = list(fm._matchfactories(fixturedefs, parentid))
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name = strip_invocation_scope_suffix(name)
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if faclist and name not in available:
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available.append(name)
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msg = "fixture %r not found" % (self.argname,)
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@ -847,7 +823,7 @@ def fixture(scope="function", params=None, autouse=False, ids=None, name=None):
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function will be injected.
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:arg scope: the scope for which this fixture is shared, one of
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"function" (default), "class", "module", "session" or "invocation".
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"function" (default), "class", "module" or "session".
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:arg params: an optional list of parameters which will cause multiple
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invocations of the fixture function and all of the tests
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@ -1029,11 +1005,6 @@ class FixtureManager:
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if fixturedefs:
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arg2fixturedefs[argname] = fixturedefs
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merge(fixturedefs[-1].argnames)
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fixturedefs_by_argname = self.getfixturedefs_multiple_scopes(argname, parentid)
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if fixturedefs_by_argname:
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arg2fixturedefs.update(fixturedefs_by_argname)
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for fixturedefs in fixturedefs_by_argname.values():
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merge(fixturedefs[-1].argnames)
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return fixturenames_closure, arg2fixturedefs
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def pytest_generate_tests(self, metafunc):
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@ -1093,10 +1064,8 @@ class FixtureManager:
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'and be decorated with @pytest.fixture:\n%s' % name
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assert not name.startswith(self._argprefix), msg
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def new_fixture_def(name, scope):
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"""Create and registers a new FixtureDef with given name and scope."""
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fixture_def = FixtureDef(self, nodeid, name, obj,
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scope, marker.params,
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marker.scope, marker.params,
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unittest=unittest, ids=marker.ids)
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faclist = self._arg2fixturedefs.setdefault(name, [])
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@ -1112,12 +1081,6 @@ class FixtureManager:
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if marker.autouse:
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autousenames.append(name)
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if marker.scope == 'invocation':
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for new_scope in scopes:
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new_fixture_def(name + ':{0}'.format(new_scope), new_scope)
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else:
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new_fixture_def(name, marker.scope)
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if autousenames:
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self._nodeid_and_autousenames.append((nodeid or '', autousenames))
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@ -1141,23 +1104,3 @@ class FixtureManager:
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if nodeid.startswith(fixturedef.baseid):
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yield fixturedef
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def getfixturedefs_multiple_scopes(self, argname, nodeid):
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"""
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Gets multiple scoped fixtures which are applicable to the given nodeid. Multiple scoped
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fixtures are created by "invocation" scoped fixtures and have argnames in
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the form: "<argname>:<scope>" (for example "tmpdir:session").
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:return: dict of "argname" -> [FixtureDef].
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Arguments similar to ``getfixturedefs``.
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"""
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prefix = argname + ':'
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fixturedefs_by_argname = dict((k, v) for k, v in self._arg2fixturedefs.items()
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if k.startswith(prefix))
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if fixturedefs_by_argname:
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result = {}
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for argname, fixturedefs in fixturedefs_by_argname.items():
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result[argname] = tuple(self._matchfactories(fixturedefs, nodeid))
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return result
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else:
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return None
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@ -10,7 +10,7 @@ import pytest
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RE_IMPORT_ERROR_NAME = re.compile("^No module named (.*)$")
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@pytest.fixture(scope='invocation')
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@pytest.fixture
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def monkeypatch(request):
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"""The returned ``monkeypatch`` fixture provides these
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helper methods to modify objects, dictionaries or os.environ::
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@ -28,8 +28,6 @@ def monkeypatch(request):
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test function or fixture has finished. The ``raising``
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parameter determines if a KeyError or AttributeError
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will be raised if the set/deletion operation has no target.
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This fixture is ``invocation``-scoped.
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"""
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mpatch = MonkeyPatch()
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request.addfinalizer(mpatch.undo)
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@ -1006,7 +1006,6 @@ def showfixtures(config):
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def _showfixtures_main(config, session):
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import _pytest.config
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from _pytest.fixtures import strip_invocation_scope_suffix
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session.perform_collect()
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curdir = py.path.local()
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tw = _pytest.config.create_terminal_writer(config)
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@ -1023,16 +1022,13 @@ def _showfixtures_main(config, session):
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continue
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for fixturedef in fixturedefs:
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loc = getlocation(fixturedef.func, curdir)
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# invocation-scoped fixtures have argname in the form
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# "<name>:<scope>" (for example: "monkeypatch:session").
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fixture_argname = strip_invocation_scope_suffix(fixturedef.argname)
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if (fixture_argname, loc) in seen:
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if (fixturedef.argname, loc) in seen:
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continue
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seen.add((fixture_argname, loc))
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seen.add((fixturedef.argname, loc))
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available.append((len(fixturedef.baseid),
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fixturedef.func.__module__,
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curdir.bestrelpath(loc),
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fixture_argname, fixturedef))
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fixturedef.argname, fixturedef))
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available.sort()
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currentmodule = None
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@ -865,13 +865,6 @@ All test methods in this TestClass will use the transaction fixture while
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other test classes or functions in the module will not use it unless
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they also add a ``transact`` reference.
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invocation-scoped fixtures
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--------------------------
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pytest 3.0 introduced a new advanced scope for fixtures: ``"invocation"``. Fixtures marked with
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this scope can be requested from any other scope, providing a version of the fixture for that scope.
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See more in :ref:`invocation_scoped_fixture`.
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Shifting (visibility of) fixture functions
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----------------------------------------------------
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@ -1,63 +0,0 @@
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.. _invocation_scoped_fixture:
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Invocation-scoped fixtures
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==========================
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.. versionadded:: 3.0
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.. note::
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This feature is experimental, so if decided that it brings too much problems
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or considered too complicated it might be removed in pytest ``3.1``.
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Fixtures can be defined with ``invocation`` scope, meaning that the fixture
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can be requested by fixtures from any scope, but when they do they assume
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the same scope as the fixture requesting it.
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An ``invocation``-scoped fixture can be requested from different scopes
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in the same test session, in which case each scope will have its own copy.
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Example
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-------
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Consider a fixture which manages external process execution:
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this fixture provides auxiliary methods for tests and fixtures to start external
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processes while making sure the
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processes terminate at the appropriate time. Because it makes sense
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to start a webserver for the entire session and also to execute a numerical
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simulation for a single test function, the ``process_manager``
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fixture can be declared as ``invocation``, so each scope gets its own
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value and can manage processes which will live for the duration of the scope.
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.. code-block:: python
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import pytest
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@pytest.fixture(scope='invocation')
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def process_manager():
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"""
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Return a ProcessManager instance which can be used to start
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long-lived processes and ensures they are terminated at the
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appropriate scope.
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"""
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m = ProcessManager()
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yield m
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m.shutdown_all()
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@pytest.fixture(scope='session')
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def server(process_manager):
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process_manager.start(sys.executable, 'server.py')
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@pytest.fixture(scope='function')
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def start_simulation(process_manager):
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import functools
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return functools.partial(process_manager.start,
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sys.executable, 'simulator.py')
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In the above code, simulators started using ``start_simulation`` will be
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terminated when the test function exits, while the server will be kept
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active for the entire simulation run, being terminated when the test session
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finishes.
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@ -14,8 +14,6 @@ and a discussion of its motivation.
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.. _`monkeypatch blog post`: http://tetamap.wordpress.com/2009/03/03/monkeypatching-in-unit-tests-done-right/
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As of pytest-3.0, the ``monkeypatch`` fixture is :ref:`invocation-scoped <invocation_scoped_fixture>`
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meaning it can be requested from fixtures of any scope.
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Simple example: monkeypatching functions
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---------------------------------------------------
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@ -433,8 +433,7 @@ class TestFillFixtures:
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"*1 error*",
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])
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assert "INTERNAL" not in result.stdout.str()
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# invocation-scoped fixture should appear with their friendly name only
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assert 'monkeypatch:session' not in result.stdout.str()
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def test_fixture_excinfo_leak(self, testdir):
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# on python2 sys.excinfo would leak into fixture executions
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@ -2743,13 +2742,6 @@ class TestShowFixtures:
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Hi from test module
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''')
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def test_show_invocation_fixtures(self, testdir):
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"""py.test --fixtures should display invocation-scoped fixtures once.
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"""
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result = testdir.runpytest("--fixtures")
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result.stdout.fnmatch_lines('''monkeypatch''')
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assert 'monkeypatch:session' not in result.stdout.str()
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@pytest.mark.parametrize('flavor', ['fixture', 'yield_fixture'])
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class TestContextManagerFixtureFuncs:
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@ -1,214 +0,0 @@
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def test_invocation_request(testdir):
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"""
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Simple test case with session and module scopes requesting an
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invocation-scoped fixture.
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"""
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testdir.makeconftest("""
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import pytest
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@pytest.fixture(scope='invocation')
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def my_name(request):
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if request.scope == 'function':
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return request.function.__name__
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elif request.scope == 'module':
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return request.module.__name__
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elif request.scope == 'session':
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return '<session>'
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@pytest.fixture(scope='session')
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def session_name(my_name):
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return my_name
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@pytest.fixture(scope='module')
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def module_name(my_name):
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return my_name
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""")
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testdir.makepyfile(test_module_foo="""
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def test_foo(my_name, module_name, session_name):
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assert my_name == 'test_foo'
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assert module_name == 'test_module_foo'
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assert session_name == '<session>'
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""")
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testdir.makepyfile(test_module_bar="""
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def test_bar(my_name, module_name, session_name):
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assert my_name == 'test_bar'
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assert module_name == 'test_module_bar'
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assert session_name == '<session>'
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""")
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(['*2 passed*'])
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def test_override_invocation_scoped(testdir):
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"""Test that it's possible to override invocation-scoped fixtures."""
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testdir.makeconftest("""
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import pytest
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@pytest.fixture(scope='invocation')
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def magic_value(request):
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if request.scope == 'function':
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return 1
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elif request.scope == 'module':
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return 100
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@pytest.fixture(scope='module')
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def module_magic_value(magic_value):
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return magic_value * 2
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""")
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testdir.makepyfile(test_module_override="""
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import pytest
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@pytest.fixture(scope='module')
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def magic_value():
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return 42
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def test_override(magic_value, module_magic_value):
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assert magic_value == 42
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assert module_magic_value == 42 * 2
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""")
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testdir.makepyfile(test_normal="""
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def test_normal(magic_value, module_magic_value):
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assert magic_value == 1
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assert module_magic_value == 200
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""")
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(['*2 passed*'])
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class TestAcceptance:
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"""
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Complete acceptance test for a invocation-scoped fixture.
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"""
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def test_acceptance(self, testdir):
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"""
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Tests a "stack" fixture which provides a separate list to each scope which uses it.
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Some notes:
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- For each scope, define 2 fixtures of the same scope which use the "stack" fixture,
|
||||
to ensure they get the same "stack" instance for that scope.
|
||||
- Creates multiple test files, which tests on each modifying and checking fixtures to
|
||||
ensure things are working properly.
|
||||
"""
|
||||
testdir.makeconftest("""
|
||||
import pytest
|
||||
|
||||
@pytest.fixture(scope='invocation')
|
||||
def stack():
|
||||
return []
|
||||
|
||||
@pytest.fixture(scope='session')
|
||||
def session1_fix(stack):
|
||||
stack.append('session1_fix')
|
||||
return stack
|
||||
|
||||
@pytest.fixture(scope='session')
|
||||
def session2_fix(stack):
|
||||
stack.append('session2_fix')
|
||||
return stack
|
||||
|
||||
@pytest.fixture(scope='module')
|
||||
def module1_fix(stack):
|
||||
stack.append('module1_fix')
|
||||
return stack
|
||||
|
||||
@pytest.fixture(scope='module')
|
||||
def module2_fix(stack):
|
||||
stack.append('module2_fix')
|
||||
return stack
|
||||
|
||||
@pytest.fixture(scope='class')
|
||||
def class1_fix(stack):
|
||||
stack.append('class1_fix')
|
||||
return stack
|
||||
|
||||
@pytest.fixture(scope='class')
|
||||
def class2_fix(stack):
|
||||
stack.append('class2_fix')
|
||||
return stack
|
||||
""")
|
||||
testdir.makepyfile(test_0="""
|
||||
import pytest
|
||||
|
||||
@pytest.fixture
|
||||
def func_stack(stack):
|
||||
return stack
|
||||
|
||||
def test_scoped_instances(session1_fix, session2_fix, module1_fix, module2_fix,
|
||||
class1_fix, class2_fix, stack, func_stack):
|
||||
assert session1_fix is session2_fix
|
||||
assert module1_fix is module2_fix
|
||||
assert class1_fix is class2_fix
|
||||
assert stack is func_stack
|
||||
|
||||
assert session1_fix is not module2_fix
|
||||
assert module2_fix is not class1_fix
|
||||
assert class1_fix is not stack
|
||||
""")
|
||||
testdir.makepyfile(test_1="""
|
||||
def test_func_1(request, session1_fix, session2_fix, module1_fix, module2_fix, stack):
|
||||
assert stack == []
|
||||
|
||||
assert session1_fix == ['session1_fix', 'session2_fix']
|
||||
session1_fix.append('test_1::test_func_1')
|
||||
|
||||
assert module1_fix == ['module1_fix', 'module2_fix']
|
||||
module1_fix.append('test_1::test_func_1')
|
||||
|
||||
|
||||
class Test:
|
||||
|
||||
def test_1(self, request, session1_fix, module1_fix, class1_fix, class2_fix, stack):
|
||||
assert stack == []
|
||||
|
||||
assert session1_fix == ['session1_fix', 'session2_fix', 'test_1::test_func_1']
|
||||
session1_fix.append('test_1::Test::test_1')
|
||||
|
||||
assert module1_fix == ['module1_fix', 'module2_fix', 'test_1::test_func_1']
|
||||
module1_fix.append('test_1::test_func_1')
|
||||
|
||||
assert class1_fix == ['class1_fix', 'class2_fix']
|
||||
class1_fix.append('test_1::Test::test_1')
|
||||
|
||||
def test_2(self, request, class1_fix, class2_fix):
|
||||
assert class1_fix == ['class1_fix', 'class2_fix', 'test_1::Test::test_1']
|
||||
class1_fix.append('Test.test_2')
|
||||
|
||||
|
||||
def test_func_2(request, session1_fix, session2_fix, module1_fix, class1_fix, class2_fix, stack):
|
||||
assert stack == []
|
||||
assert session1_fix == ['session1_fix', 'session2_fix', 'test_1::test_func_1',
|
||||
'test_1::Test::test_1']
|
||||
session1_fix.append('test_1::test_func_2')
|
||||
|
||||
assert module1_fix == ['module1_fix', 'module2_fix', 'test_1::test_func_1', 'test_1::test_func_1']
|
||||
|
||||
assert class1_fix == ['class1_fix', 'class2_fix']
|
||||
""")
|
||||
testdir.makepyfile(test_2="""
|
||||
import pytest
|
||||
|
||||
@pytest.fixture(scope='session')
|
||||
def another_session_stack(stack):
|
||||
stack.append('other_session_stack')
|
||||
return stack
|
||||
|
||||
def test_func_2(request, another_session_stack, module1_fix, stack):
|
||||
assert stack == []
|
||||
assert another_session_stack == [
|
||||
'session1_fix',
|
||||
'session2_fix',
|
||||
'test_1::test_func_1',
|
||||
'test_1::Test::test_1',
|
||||
'test_1::test_func_2',
|
||||
'other_session_stack',
|
||||
]
|
||||
assert module1_fix == ['module1_fix']
|
||||
""")
|
||||
result = testdir.runpytest()
|
||||
assert result.ret == 0
|
||||
result.stdout.fnmatch_lines('* 6 passed in *')
|
||||
|
||||
|
||||
|
|
@ -331,33 +331,3 @@ def test_issue1338_name_resolving():
|
|||
monkeypatch.undo()
|
||||
|
||||
|
||||
def test_invocation_scoped_monkeypatch(testdir):
|
||||
testdir.makeconftest("""
|
||||
import pytest
|
||||
import sys
|
||||
|
||||
@pytest.fixture(scope='module')
|
||||
def stamp_sys(monkeypatch):
|
||||
monkeypatch.setattr(sys, 'module_stamped', True, raising=False)
|
||||
""")
|
||||
testdir.makepyfile(test_inv_mokeypatch_1="""
|
||||
import sys
|
||||
|
||||
def test_stamp_1(monkeypatch, stamp_sys):
|
||||
assert sys.module_stamped
|
||||
monkeypatch.setattr(sys, 'function_stamped', True, raising=False)
|
||||
assert sys.function_stamped
|
||||
|
||||
def test_stamp_2(monkeypatch):
|
||||
assert sys.module_stamped
|
||||
assert not hasattr(sys, 'function_stamped')
|
||||
""")
|
||||
testdir.makepyfile(test_inv_mokeypatch_2="""
|
||||
import sys
|
||||
|
||||
def test_no_stamps():
|
||||
assert not hasattr(sys, 'module_stamped')
|
||||
assert not hasattr(sys, 'function_stamped')
|
||||
""")
|
||||
result = testdir.runpytest()
|
||||
result.stdout.fnmatch_lines(['*3 passed*'])
|
||||
|
|
|
|||
Loading…
Reference in New Issue