Fix loading of fake modules for relative imports

pyfakefs/fake_filesystem_unittest.py

@@ -1244,10 +1244,10 @@ def fake_module_path(self, name: str) -> str:
                 module_path = fs.joinpaths(path, base_path)
                 py_module_path = module_path + ".py"
                 if fs.exists(py_module_path):
-                    return py_module_path
+                    return fs.absnormpath(py_module_path)
                 init_path = fs.joinpaths(module_path, "__init__.py")
                 if fs.exists(init_path):
-                    return init_path
+                    return fs.absnormpath(init_path)
         return ""
 
     def find_spec(

pyfakefs/tests/fake_filesystem_unittest_test.py

@@ -978,6 +978,15 @@ def test_fake_import_dotted_module(self):
         assert module.__name__ == "fakepkg.fake_module"
         assert module.number == 42
 
+    def test_fake_relative_import(self):
+        fake_module_path = Path("site-packages") / "fake_module.py"
+        self.fs.create_file(fake_module_path, contents="number = 42")
+        sys.path.insert(0, str(fake_module_path.parent))
+        module = importlib.import_module("fake_module")
+        del sys.path[0]
+        assert module.__name__ == "fake_module"
+        assert module.number == 42
+
 
 if __name__ == "__main__":
     unittest.main()