add test for slots endpoint

Author: ngxson

examples/server/server.cpp

@@ -2184,6 +2184,7 @@ struct server_context {
 
                     auto res = std::make_unique<server_task_result_metrics>();
                     res->id                  = task.id;
+                    res->slots_data          = slots_data;
                     res->n_idle_slots        = n_idle_slots;
                     res->n_processing_slots  = n_processing_slots;
                     res->n_tasks_deferred    = queue_tasks.queue_tasks_deferred.size();

examples/server/tests/unit/test_basic.py

@@ -33,6 +33,17 @@ def test_server_models():
     assert len(res.body["data"]) == 1
     assert res.body["data"][0]["id"] == server.model_alias
 
+
+def test_server_slots():
+    global server
+    server.server_slots = True
+    server.start()
+    res = server.make_request("GET", "/slots")
+    assert res.status_code == 200
+    assert len(res.body) == server.n_slots
+    assert res.body[0]["n_ctx"] > 0
+
+
 def test_load_split_model():
     global server
     server.model_hf_repo = "ggml-org/models"

examples/server/tests/unit/test_chat_completion.py

@@ -30,7 +30,7 @@ def test_chat_completion(model, system_prompt, user_prompt, max_tokens, re_conte
         ],
     })
     assert res.status_code == 200
-    assert "cmpl" in res.body["id"]
+    assert "cmpl" in res.body["id"] # make sure the completion id has the expected format
     assert res.body["model"] == model if model is not None else server.model_alias
     assert res.body["usage"]["prompt_tokens"] == n_prompt
     assert res.body["usage"]["completion_tokens"] == n_predicted
@@ -66,7 +66,7 @@ def test_chat_completion_stream(system_prompt, user_prompt, max_tokens, re_conte
         assert "gpt-3.5" in data["model"] # DEFAULT_OAICOMPAT_MODEL, maybe changed in the future
         if last_cmpl_id is None:
             last_cmpl_id = data["id"]
-        assert last_cmpl_id == data["id"]
+        assert last_cmpl_id == data["id"] # make sure the completion id is the same for all events in the stream
         if choice["finish_reason"] in ["stop", "length"]:
             assert data["usage"]["prompt_tokens"] == n_prompt
             assert data["usage"]["completion_tokens"] == n_predicted

examples/server/tests/utils.py

@@ -64,6 +64,7 @@ class ServerProcess:
     server_embeddings: bool | None = False
     server_reranking: bool | None = False
     server_metrics: bool | None = False
+    server_slots: bool | None = False
     draft: int | None = None
     api_key: str | None = None
     response_format: str | None = None
@@ -129,6 +130,8 @@ def start(self, timeout_seconds: int = 10) -> None:
             server_args.append("--reranking")
         if self.server_metrics:
             server_args.append("--metrics")
+        if self.server_slots:
+            server_args.append("--slots")
         if self.model_alias:
             server_args.extend(["--alias", self.model_alias])
         if self.n_ctx: