Add acceptance test for invocation-scoped fixtures

Author: nicoddemus

testing/python/invocation_scope.py

@@ -0,0 +1,138 @@
+
+
+class TestAcceptance:
+    """
+    Complete acceptance test for a invocation-scoped fixture.
+    """
+
+    def test_acceptance(self, testdir):
+        """
+        Tests a "stack" fixture which provides a separate list to each scope which uses it.
+
+        Some notes:
+
+        - For each scope, define 2 fixtures of the same scope which use the "stack" fixture,
+          to ensure they get the same "stack" instance for its 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 *')
+
+