move to custom pytest plugin test runner, fix tests, add Any fallback to ForeignKey

mypy_django_plugin/monkeypatch/dependencies.py

@@ -0,0 +1,52 @@
+from typing import List, Optional
+
+from mypy.build import BuildManager, Graph, State
+from mypy.modulefinder import BuildSource
+
+
+def is_module_present_in_sources(module_name: str, sources: List[BuildSource]):
+    return any([source.module == module_name for source in sources])
+
+
+from mypy import build
+
+old_load_graph = build.load_graph
+OldState = build.State
+
+
+def load_graph_to_add_settings_file_as_a_source_seed(settings_module: str):
+    def patched_load_graph(sources: List[BuildSource], manager: BuildManager,
+                           old_graph: Optional[Graph] = None,
+                           new_modules: Optional[List[State]] = None):
+        if not is_module_present_in_sources(settings_module, sources):
+            sources.append(BuildSource(None, settings_module, None))
+
+        return old_load_graph(sources=sources, manager=manager,
+                              old_graph=old_graph,
+                              new_modules=new_modules)
+
+    build.load_graph = patched_load_graph
+
+
+def restore_original_load_graph():
+    from mypy import build
+
+    build.load_graph = old_load_graph
+
+
+def inject_dependencies(settings_module: str):
+    from mypy import build
+
+    class PatchedState(build.State):
+        def __init__(self, *args, **kwargs):
+            super().__init__(*args, **kwargs)
+            if self.id == 'django.conf':
+                self.dependencies.append(settings_module)
+
+    build.State = PatchedState
+
+
+def restore_original_dependencies_handling():
+    from mypy import build
+
+    build.State = OldState