feat(tplus): 新增 T+ 只读同步服务与同步管理

backend/tests/unit/test_tplus_connection_file.py

@@ -0,0 +1,72 @@
+"""显式连接文件不应污染应用配置，也不能启用未授权的数据源。"""
+
+import json
+
+import pytest
+
+from app.core.config import Settings
+from app.core.tplus_db import resolve_tplus_settings
+
+
+def test_未开启连接时不读取配置文件(tmp_path):
+    settings = Settings(
+        _env_file=None,
+        app_secret_key="x" * 32,
+        t_plus_connection_file=str(tmp_path / "missing.json"),
+    )
+    with pytest.raises(RuntimeError, match="未启用"):
+        resolve_tplus_settings(settings)
+
+
+def test_文件连接只覆盖源字段且原Settings不变(tmp_path):
+    path = tmp_path / "reader.json"
+    path.write_text(
+        json.dumps(
+            {
+                "host": "127.0.0.1",
+                "port": 1433,
+                "database": "UFTData",
+                "user": "reader",
+                "password": "test-only-value",
+                "driver": "SQL Server",
+            }
+        ),
+        encoding="utf-8",
+    )
+    settings = Settings(
+        _env_file=None,
+        app_secret_key="x" * 32,
+        t_plus_enabled=True,
+        t_plus_connection_file=str(path),
+    )
+    resolved = resolve_tplus_settings(settings)
+    assert resolved.t_plus_database == "UFTData"
+    assert resolved.mysql_database == settings.mysql_database
+    assert settings.t_plus_password == ""
+    assert "test-only-value" not in str(resolved.t_plus_database_url)
+
+
+def test_连接文件不接受sa或应用配置覆盖(tmp_path):
+    path = tmp_path / "bad.json"
+    path.write_text(
+        json.dumps(
+            {
+                "host": "127.0.0.1",
+                "port": 1433,
+                "database": "UFTData",
+                "user": "sa",
+                "password": "test-only-value",
+                "driver": "SQL Server",
+                "app_secret_key": "bad",
+            }
+        ),
+        encoding="utf-8",
+    )
+    settings = Settings(
+        _env_file=None,
+        app_secret_key="x" * 32,
+        t_plus_enabled=True,
+        t_plus_connection_file=str(path),
+    )
+    with pytest.raises(RuntimeError):
+        resolve_tplus_settings(settings)