FabledScribe/tests/test_routes_design_systems.py

"""Structural tests for the design-systems blueprint + the parity guard.

Modelled on tests/test_routes_snippets.py. The enumerations below are
deliberate: relaxing one to a pattern would stop it catching the thing it was
written for, which is a capability landing on one surface and not the other.
"""
import inspect


def test_design_systems_blueprint_registered():
    from scribe.routes.design_systems import design_systems_bp
    assert design_systems_bp.name == "design_systems"
    assert design_systems_bp.url_prefix == "/api"


def test_design_systems_blueprint_registered_in_app():
    from scribe.app import create_app
    app = create_app()
    assert "design_systems" in app.blueprints


def test_route_handlers_callable():
    from scribe.routes import design_systems as routes
    for name in (
        "list_design_systems", "create_design_system", "get_design_system",
        "update_design_system", "delete_design_system", "resolve_design_system",
        "get_design_system_stylesheet",
        "check_snippets_against_system",
        "list_design_tokens", "create_design_token",
        "update_design_token", "delete_design_token", "set_project_design_system",
    ):
        assert callable(getattr(routes, name))


def test_every_endpoint_is_reachable_on_the_app():
    """The handlers existing is not the same as them being routed. This catches
    a decorator that was copied without its path changing — two handlers on one
    rule, where the second silently never runs."""
    from scribe.app import create_app
    app = create_app()
    rules = {
        str(r.rule) for r in app.url_map.iter_rules()
        if r.endpoint.startswith("design_systems.")
    }
    assert rules == {
        "/api/design-systems",
        "/api/design-systems/<int:design_system_id>",
        "/api/design-systems/<int:design_system_id>/resolved",
        "/api/design-systems/<int:design_system_id>/stylesheet",
        "/api/design-systems/<int:design_system_id>/snippet-check",
        "/api/design-systems/<int:design_system_id>/tokens",
        "/api/design-tokens/<int:token_id>",
        "/api/projects/<int:project_id>/design-system",
    }


def test_service_functions_take_user_id():
    """Routes must call the services with user_id — verify the contract (#33)."""
    from scribe.services import design_systems as svc
    for fn_name in (
        "create_design_system", "list_design_systems", "get_design_system",
        "update_design_system", "delete_design_system", "resolve_design_system",
        "create_token", "list_tokens", "update_token", "delete_token",
        "set_project_design_system",
        "stylesheet_for_system", "check_snippets_against_system",
    ):
        fn = getattr(svc, fn_name)
        assert callable(fn)
        assert "user_id" in inspect.signature(fn).parameters


def test_agent_and_web_surfaces_stay_at_parity():
    """The MCP tools and the REST routes are two callers of one service; a
    capability on one has to exist on the other (rule #33).

    This guard exists because the snippet surfaces drifted apart once — MCP had
    no delete, the web side had no near-duplicate gate — and neither failed
    anything until someone went looking.
    """
    from scribe.mcp.tools import design_systems as tools
    from scribe.routes import design_systems as routes

    for name in (
        "create_design_system", "list_design_systems", "get_design_system",
        "resolve_design_system", "update_design_system", "delete_design_system",
        "create_design_token", "list_design_tokens", "update_design_token",
        "delete_design_token", "set_project_design_system",
        "get_design_system_stylesheet",
    ):
        assert callable(getattr(tools, name)), f"MCP tool missing: {name}"
        assert callable(getattr(routes, name)), f"REST route missing: {name}"

    # The snippet check is the one verb whose handler names differ between the
    # surfaces (the tool says what it checks AGAINST; the route is already under
    # the system), so the loop above can't pair it. It still has to exist on both.
    assert callable(tools.check_snippets_against_design_system)
    assert callable(routes.check_snippets_against_system)


def test_every_mcp_tool_in_the_module_is_registered():
    """A tool written but never registered is invisible to an agent, and nothing
    else in the codebase would notice."""
    from scribe.mcp.tools import design_systems as tools

    registered = []

    class _Recorder:
        def tool(self, name):
            registered.append(name)
            return lambda fn: fn

    tools.register(_Recorder())

    public = {
        name for name, obj in vars(tools).items()
        if inspect.iscoroutinefunction(obj) and not name.startswith("_")
    }
    assert set(registered) == public