refactor(storage): route project DSNs and remove legacy backends

tests/unit/test_project_routing.py

@@ -0,0 +1,85 @@
+import pytest
+from psycopg.conninfo import conninfo_to_dict
+
+from app.infra.db.project_routing import (
+    ActiveProjectRouting,
+    activate_project_routing,
+    get_active_project_routing,
+    get_project_pgconn_string,
+    get_project_timescale_pgconn_string,
+)
+
+
+def _routing(project_code: str = "project_a") -> ActiveProjectRouting:
+    return ActiveProjectRouting(
+        project_code=project_code,
+        business_dsn=(
+            "postgresql://biz_user:biz_password@biz.example:5432/biz_database"
+            "?sslmode=require"
+        ),
+        timescale_dsn=(
+            "postgresql://ts_user:ts_password@timescale.example:5433/ts_database"
+            "?sslmode=require"
+        ),
+    )
+
+
+def test_project_database_uses_exact_routing_dsn_for_project_code() -> None:
+    routing = _routing()
+
+    with activate_project_routing(routing):
+        assert get_project_pgconn_string("project_a") == routing.business_dsn
+        assert (
+            get_project_timescale_pgconn_string("project_a")
+            == routing.timescale_dsn
+        )
+
+
+def test_business_template_keeps_server_and_timescale_ignores_legacy_db_name() -> None:
+    with activate_project_routing(_routing()):
+        business = conninfo_to_dict(get_project_pgconn_string("project_a_template"))
+        timescale = conninfo_to_dict(
+            get_project_timescale_pgconn_string("temporary_scheme")
+        )
+
+    assert business == {
+        "user": "biz_user",
+        "password": "biz_password",
+        "dbname": "project_a_template",
+        "host": "biz.example",
+        "port": "5432",
+        "sslmode": "require",
+    }
+    assert timescale == {
+        "user": "ts_user",
+        "password": "ts_password",
+        "dbname": "ts_database",
+        "host": "timescale.example",
+        "port": "5433",
+        "sslmode": "require",
+    }
+
+
+def test_project_routing_is_nested_and_request_local() -> None:
+    first = _routing("project_a")
+    second = _routing("project_b")
+
+    assert get_active_project_routing() is None
+    with activate_project_routing(first):
+        assert get_active_project_routing() is first
+        with activate_project_routing(second):
+            assert get_active_project_routing() is second
+        assert get_active_project_routing() is first
+    assert get_active_project_routing() is None
+
+
+def test_timescale_access_requires_iot_routing_in_project_request() -> None:
+    business_only = _routing()
+    business_only = ActiveProjectRouting(
+        project_code=business_only.project_code,
+        business_dsn=business_only.business_dsn,
+    )
+
+    with activate_project_routing(business_only):
+        with pytest.raises(RuntimeError, match="TimescaleDB routing is not configured"):
+            get_project_timescale_pgconn_string()