more reset refactoring

ixmp4/data/backend/api.py

@@ -168,6 +168,7 @@ def make_client(self, rest_url: str, auth: BaseAuth):
     def close(self):
         self.client.close()
         self.executor.shutdown(cancel_futures=True)
+        self.db_backend.close()
 
     def setup(self):
         self.db_backend.setup()

tests/conftest.py

@@ -47,14 +47,18 @@ def __init__(self, postgres_dsn: str) -> None:
     def rest_sqlite(self):
         with self.sqlite() as backend:
             rest = RestTestBackend(backend)
+            rest.setup()
             yield rest
+            rest.teardown()
             rest.close()
 
     @contextmanager
     def rest_postgresql(self):
         with self.postgresql() as backend:
             rest = RestTestBackend(backend)
+            rest.setup()
             yield rest
+            rest.teardown()
             rest.close()
 
     @contextmanager
@@ -65,15 +69,19 @@ def postgresql(self):
                 dsn=self.postgres_dsn,
             ),
         )
+        pgsql.setup()
         yield pgsql
+        pgsql.teardown()
         pgsql.close()
 
     @contextmanager
     def sqlite(self):
         sqlite = SqliteTestBackend(
             PlatformInfo(name="sqlite-test", dsn="sqlite:///:memory:")
         )
+        sqlite.setup()
         yield sqlite
+        sqlite.teardown()
         sqlite.close()
 
 
@@ -97,9 +105,7 @@ def platform_fixture(request):
     bctx = get_backend_context(type, postgres_dsn)
 
     with bctx as backend:
-        backend.setup()
         yield Platform(_backend=backend)
-        backend.teardown()
 
 
 rest_platform = pytest.fixture(platform_fixture, name="rest_platform")
@@ -116,11 +122,9 @@ def platform_td_big(request):
     bctx = get_backend_context(type, postgres_dsn)
 
     with bctx as backend:
-        backend.setup()
         platform = Platform(_backend=backend)
         big.load_dataset(platform)
         yield platform
-        backend.teardown()
 
 
 db_platform_big = pytest.fixture(