"""Transport-level tests for the mcp-maildir ASGI app.

Current MCP clients (OpenCode, Claude, ...) only speak Streamable HTTP: they
POST JSON-RPC to the configured URL. Serving the legacy SSE transport alone
makes those clients fail with `405 Method Not Allowed`, so the app built by
`server.build_app()` must expose the MCP endpoint at /mcp.

Env vars are set in tests/conftest.py (shared session-wide).
"""

from server import build_app, MCP_HTTP_PATH


def app_paths() -> set:
    return {getattr(route, "path", None) for route in build_app().routes}


class TestTransport:
    def test_mcp_endpoint_is_streamable_http(self):
        assert MCP_HTTP_PATH == "/mcp"
        assert MCP_HTTP_PATH in app_paths()

    def test_health_endpoint_is_exposed_for_probes(self):
        assert "/health" in app_paths()

    def test_legacy_sse_endpoint_is_gone(self):
        assert "/sse" not in app_paths()