Added py.typed file in generated package

Closes #18

Author: dbanty

openapi_python_client/__init__.py

@@ -85,6 +85,9 @@ def _create_package(self) -> None:
         package_init_template = self.env.get_template("package_init.pyi")
         package_init.write_text(package_init_template.render(description=self.package_description))
 
+        pytyped = self.package_dir / "py.typed"
+        pytyped.write_text("# Marker file for PEP 561")
+
     def _build_metadata(self) -> None:
         # Create a pyproject.toml file
         pyproject_template = self.env.get_template("pyproject.toml")

tests/test___init__.py

@@ -184,14 +184,21 @@ def test__create_package(self, mocker):
         project.env = mocker.MagicMock()
         project.env.get_template.return_value = package_init_template
         package_init_path = mocker.MagicMock(autospec=pathlib.Path)
-        project.package_dir.__truediv__.return_value = package_init_path
+        pytyped_path = mocker.MagicMock(autospec=pathlib.Path)
+        paths = {
+            "__init__.py":  package_init_path,
+            "py.typed": pytyped_path,
+        }
+
+        project.package_dir.__truediv__.side_effect = lambda x: paths[x]
 
         project._create_package()
 
         project.package_dir.mkdir.assert_called_once()
         project.env.get_template.assert_called_once_with("package_init.pyi")
         package_init_template.render.assert_called_once_with(description=project.package_description)
         package_init_path.write_text.assert_called_once_with(package_init_template.render())
+        pytyped_path.write_text.assert_called_once_with("# Marker file for PEP 561")
 
     def test__build_metadata(self, mocker):
         from openapi_python_client import _Project