storage: add tests

system/t12_api/storage.py

@@ -0,0 +1,11 @@
+from api_lib import APITest
+
+
+class TaskAPITestSwaggerDocs(APITest):
+    """
+    GET /docs
+    """
+
+    def check(self):
+        resp = self.get("/api/storage")
+        self.check_equal(resp.status_code, 200)