test: 补充权限、消息与会话服务回归用例

会话读取、接管、重分配与 Socket 订阅统一校验角色、组织与可见性。

backend/tests/api/test_help_center_tls_ask.py

@@ -0,0 +1,56 @@
+"""
+Copyright 2024-2026 ReplyPier
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Tests for the on-demand-TLS "ask" gate (GET /health/help-center-domain) that an
+edge proxy (e.g. Caddy) calls before issuing a certificate for a hostname.
+"""
+
+from unittest.mock import patch
+
+from fastapi.testclient import TestClient
+
+import app.main  # noqa: F401 — registers routes on the FastAPI app
+from app.core.application import app
+
+client = TestClient(app)
+ASK = "/health/help-center-domain"
+
+
+def test_allows_slug_subdomain():
+    # {slug}.HELP_CENTER_BASE_DOMAIN is a help-center host without any DB lookup.
+    assert client.get(ASK, params={"domain": "acme.help.replypier.site"}).status_code == 200
+
+
+def test_allows_verified_custom_domain():
+    with patch("app.core.help_center_host._domain_cache") as cache:
+        cache.contains.return_value = True
+        assert client.get(ASK, params={"domain": "help.customer.com"}).status_code == 200
+
+
+def test_rejects_unknown_domain():
+    with patch("app.core.help_center_host._domain_cache") as cache:
+        cache.contains.return_value = False
+        assert client.get(ASK, params={"domain": "evil.example.com"}).status_code == 404
+
+
+def test_rejects_missing_or_empty_domain():
+    assert client.get(ASK).status_code == 404
+    assert client.get(ASK, params={"domain": ""}).status_code == 404
+
+
+def test_normalizes_host_with_port_and_uppercase():
+    # SNI can arrive with a port / mixed case; normalize_host must canonicalize
+    # it so the slug match still succeeds.
+    assert client.get(ASK, params={"domain": "ACME.help.replypier.site:443"}).status_code == 200