Function insert_missing_modules

src/_pytest/pathlib.py:593–610

Used by ``import_path`` to create intermediate modules when using mode=importlib. When we want to import a module as "src.tests.test_foo" for example, we need to create empty modules "src" and "src.tests" after inserting "src.tests.test_foo", otherwise "src.tests.test_foo" is not i

(modules: Dict[str, ModuleType], module_name: str)

def insert_missing_modules(modules: Dict[str, ModuleType], module_name: str) -> None:
    """
    Used by ``import_path`` to create intermediate modules when using mode=importlib.

    When we want to import a module as "src.tests.test_foo" for example, we need
    to create empty modules "src" and "src.tests" after inserting "src.tests.test_foo",
    otherwise "src.tests.test_foo" is not importable by ``__import__``.
    """
    module_parts = module_name.split(".")
    while module_name:
        if module_name not in modules:
            module = ModuleType(
                module_name,
                doc="Empty module created by pytest's importmode=importlib.",
            )
            modules[module_name] = module
        module_parts.pop(-1)
        module_name = ".".join(module_parts)


def resolve_package_path(path: Path) -> Optional[Path]: