Squash Odysseus development history

tests/test_memory_routes_shim.py

@@ -0,0 +1,43 @@
+"""Regression test for the memory route shim (slice 2c, #4082/#4071).
+
+The backward-compat shim at ``routes/memory_routes.py`` uses ``sys.modules``
+replacement so the legacy import path and the canonical ``routes.memory.*``
+path resolve to the *same* module object. This is required because
+``test_memory_routes_session_owner.py`` and ``test_memory_owner_isolation.py``
+do ``import routes.memory_routes as mr`` followed by
+``monkeypatch.setattr(mr, "get_current_user", ...)`` — for those patches to
+take effect at runtime, the legacy module object and the canonical one must
+be identical. This test pins that contract.
+"""
+
+import importlib
+
+import routes.memory_routes as _shim_memory  # noqa: F401
+
+
+def test_legacy_and_canonical_memory_module_are_same_object():
+    """``import routes.memory_routes`` must alias the canonical module."""
+    legacy = importlib.import_module("routes.memory_routes")
+    canonical = importlib.import_module("routes.memory.memory_routes")
+    assert legacy is canonical, (
+        "routes.memory_routes shim must resolve to the canonical "
+        "routes.memory.memory_routes module object"
+    )
+
+
+def test_monkeypatch_via_legacy_alias_reaches_canonical(monkeypatch):
+    """Patching through the legacy alias must reach the canonical module.
+
+    Several memory tests do ``import routes.memory_routes as mr`` followed by
+    ``monkeypatch.setattr(mr, "get_current_user", ...)``. For that to take
+    effect at runtime, the legacy module object and the canonical one must be
+    identical.
+    """
+    legacy = importlib.import_module("routes.memory_routes")
+    canonical = importlib.import_module("routes.memory.memory_routes")
+
+    sentinel = object()
+    monkeypatch.setattr(legacy, "setup_memory_routes", sentinel)
+    assert canonical.setup_memory_routes is sentinel, (
+        "monkeypatch via legacy alias did not reach the canonical module"
+    )