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How to use get_fixture_dependencies method in Lemoncheesecake

Best Python code snippet using lemoncheesecake

fixture.py

Source:fixture.py

...181        for fixture in fixtures:182            self.add_fixture(fixture)183    def get_fixture(self, name):184        return self._fixtures[name]185    def get_fixture_dependencies(self, name, ref_fixtures=()):186        fixture_params = [p for p in self._fixtures[name].params if p != "fixture_name"]187        if any(ref_fixture in fixture_params for ref_fixture in ref_fixtures):188            raise FixtureConstraintViolation(189                "Fixture params %s have circular dependency on a fixture among %s" % (fixture_params, ref_fixtures)190            )191        dependencies = OrderedSet()192        for param in fixture_params:193            if param not in self._fixtures:194                raise FixtureConstraintViolation("Fixture '%s' used by fixture '%s' does not exist" % (param, name))195            dependencies.update(self.get_fixture_dependencies(param, (name,) + ref_fixtures))196        dependencies.update(fixture_params)197        return dependencies198    def check_dependencies(self):199        """200        Checks for:201        - missing dependencies202        - circular dependencies203        - scope incoherence204        - forbidden fixture name205        raises FixtureConstraintViolation if a check fails206        """207        # first, check for forbidden fixture name208        for fixture_name in self._fixtures.keys():209            if fixture_name in _FORBIDDEN_FIXTURE_NAMES:210                raise FixtureConstraintViolation("Fixture name '%s' is forbidden" % fixture_name)211        # second, check for missing & circular dependencies212        for fixture_name in self._fixtures.keys():213            self.get_fixture_dependencies(fixture_name)214        # third, check fixture compliance with their direct fixture dependencies215        for fixture in self._fixtures.values():216            dependency_fixtures = [self._fixtures[param] for param in fixture.params if param != "fixture_name"]217            for dependency_fixture in dependency_fixtures:218                if dependency_fixture.per_thread and fixture.scope != "test":219                    raise FixtureConstraintViolation(220                        "Fixture '%s' with scope '%s' is incompatible with per-thread fixture '%s'" % (221                            fixture.name, fixture.scope, dependency_fixture.name222                        )223                    )224                if dependency_fixture.scope_level < fixture.scope_level:225                    raise FixtureConstraintViolation(226                        "Fixture '%s' with scope '%s' is incompatible with scope '%s' of fixture '%s'" % (227                            fixture.name, fixture.scope, dependency_fixture.scope, dependency_fixture.name228                        )229                    )230    def check_fixtures_in_test(self, test):231        for fixture in test.get_fixtures():232            if fixture not in self._fixtures:233                raise FixtureConstraintViolation("Unknown fixture '%s' used in test '%s'" % (fixture, test.path))234    def check_fixtures_in_suite(self, suite):235        for fixture_name in suite.get_fixtures():236            try:237                fixture = self._fixtures[fixture_name]238            except KeyError:239                raise FixtureConstraintViolation("Suite '%s' uses an unknown fixture '%s'" % (suite.path, fixture_name))240            if fixture.per_thread:241                raise FixtureConstraintViolation(242                    "Suite '%s' uses per-thread fixture '%s' which is not allowed" % (243                        suite.path, fixture.name244                    )245                )246            if fixture.scope_level < _SCOPE_LEVELS["suite"]:247                raise FixtureConstraintViolation("Suite '%s' uses fixture '%s' which has an incompatible scope" % (248                    suite.path, fixture.name249                ))250        for test in suite.get_tests():251            self.check_fixtures_in_test(test)252        for sub_suite in suite.get_suites():253            self.check_fixtures_in_suite(sub_suite)254    def check_fixtures_in_suites(self, suites):255        for suite in suites:256            self.check_fixtures_in_suite(suite)257    def get_fixture_scope(self, name):258        return self._fixtures[name].scope259    @staticmethod260    def get_fixtures_used_in_suite(suite, include_disabled):261        if not suite.has_enabled_tests() and not include_disabled:262            return OrderedSet()263        fixtures = suite.get_fixtures()264        for test in suite.get_tests():265            if test.is_enabled() or include_disabled:266                fixtures.update(test.get_fixtures())267        return fixtures268    @staticmethod269    def get_fixtures_used_in_suite_recursively(suite, include_disabled):270        fixtures = FixtureRegistry.get_fixtures_used_in_suite(suite, include_disabled)271        for sub_suite in suite.get_suites():272            fixtures.update(FixtureRegistry.get_fixtures_used_in_suite_recursively(sub_suite, include_disabled))273        return fixtures274    def get_scheduled_fixtures_for_scope(self, direct_fixtures, scope, parent_scheduled_fixtures=None):275        fixtures = OrderedSet()276        for fixture in direct_fixtures:277            fixtures.update(self.get_fixture_dependencies(fixture))278            fixtures.add(fixture)279        return ScheduledFixtures(280            scope, [self._fixtures[name] for name in fixtures if self._fixtures[name].scope == scope],281            parent_scheduled_fixtures=parent_scheduled_fixtures282        )283    def get_fixtures_scheduled_for_pre_run(self, suites, include_disabled=False):284        fixtures = OrderedSet()285        for suite in suites:286            fixtures.update(FixtureRegistry.get_fixtures_used_in_suite_recursively(suite, include_disabled))287        return self.get_scheduled_fixtures_for_scope(fixtures, "pre_run")288    def get_fixtures_scheduled_for_session(self, suites, prerun_session_scheduled_fixtures, include_disabled=False):289        fixtures = OrderedSet()290        for suite in suites:291            fixtures.update(FixtureRegistry.get_fixtures_used_in_suite_recursively(suite, include_disabled))...

test_fixtures.py

Source:test_fixtures.py

...150    registry = FixtureRegistry()151    registry.add_fixtures(load_fixtures_from_func(foo))152    registry.add_fixtures(load_fixtures_from_func(bar))153    with pytest.raises(exceptions.LemoncheesecakeException) as excinfo:154        registry.get_fixture_dependencies("foo")155    assert 'circular' in str(excinfo.value)156def test_registry_fixture_circular_dependency_indirect():157    @lcc.fixture()158    def baz(foo):159        return foo * 2160    @lcc.fixture()161    def bar(baz):162        return baz * 2163    @lcc.fixture()164    def foo(bar):165        return bar * 2166    registry = FixtureRegistry()167    registry.add_fixtures(load_fixtures_from_func(foo))168    registry.add_fixtures(load_fixtures_from_func(bar))169    registry.add_fixtures(load_fixtures_from_func(baz))170    with pytest.raises(exceptions.LemoncheesecakeException) as excinfo:171        registry.get_fixture_dependencies("foo")172    assert 'circular' in str(excinfo.value)173def test_registry_fixture_circular_dependency_indirect_2():174    @lcc.fixture()175    def baz(bar):176        return bar * 2177    @lcc.fixture()178    def bar(baz):179        return baz * 2180    @lcc.fixture()181    def foo(bar):182        return bar * 2183    registry = FixtureRegistry()184    registry.add_fixtures(load_fixtures_from_func(foo))185    registry.add_fixtures(load_fixtures_from_func(bar))186    registry.add_fixtures(load_fixtures_from_func(baz))187    with pytest.raises(exceptions.LemoncheesecakeException) as excinfo:188        registry.get_fixture_dependencies("foo")189    assert 'circular' in str(excinfo.value)190def test_registry_fixture_name():191    @lcc.fixture()192    def foo(fixture_name):193        pass194    registry = FixtureRegistry()195    registry.add_fixtures(load_fixtures_from_func(foo))196    registry.check_dependencies()197def test_registry_get_fixture_without_param_dependency():198    @lcc.fixture()199    def foo():200        return 42201    registry = FixtureRegistry()202    registry.add_fixtures(load_fixtures_from_func(foo))203    assert registry.get_fixture_dependencies("foo") == []204def test_registry_get_fixture_with_param_dependency():205    @lcc.fixture()206    def bar():207        return 21208    @lcc.fixture()209    def foo(bar):210        return bar * 2211    registry = FixtureRegistry()212    registry.add_fixtures(load_fixtures_from_func(foo))213    registry.add_fixtures(load_fixtures_from_func(bar))214    assert registry.get_fixture_dependencies("foo") == ["bar"]215def test_registry_get_fixture_with_params_dependency():216    @lcc.fixture()217    def zoub():218        return 21219    @lcc.fixture()220    def baz(zoub):221        return zoub222    @lcc.fixture()223    def bar(baz):224        return baz * 2225    @lcc.fixture()226    def foo(bar, baz):227        return bar * baz228    registry = FixtureRegistry()229    registry.add_fixtures(load_fixtures_from_func(foo))230    registry.add_fixtures(load_fixtures_from_func(bar))231    registry.add_fixtures(load_fixtures_from_func(baz))232    registry.add_fixtures(load_fixtures_from_func(zoub))233    assert registry.get_fixture_dependencies("foo") == ["zoub", "baz", "bar"]234def test_registry_compatible_scope():235    @lcc.fixture(scope="session")236    def bar():237        return 21238    @lcc.fixture(scope="test")239    def foo(bar):240        return bar * 2241    registry = FixtureRegistry()242    registry.add_fixtures(load_fixtures_from_func(foo))243    registry.add_fixtures(load_fixtures_from_func(bar))244    registry.check_dependencies()245def test_registry_incompatible_scope():246    @lcc.fixture(scope="test")247    def bar():...

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