Sync from upstream llama.cpp repository

tools/server/tests/unit/test_router.py

@@ -0,0 +1,194 @@
+import pytest
+from utils import *
+
+server: ServerProcess
+
+@pytest.fixture(autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.router()
+
+
+@pytest.mark.parametrize(
+    "model,success",
+    [
+        ("ggml-org/tinygemma3-GGUF:Q8_0", True),
+        ("non-existent/model", False),
+    ]
+)
+def test_router_chat_completion_stream(model: str, success: bool):
+    global server
+    server.start()
+    content = ""
+    ex: ServerError | None = None
+    try:
+        res = server.make_stream_request("POST", "/chat/completions", data={
+            "model": model,
+            "max_tokens": 16,
+            "messages": [
+                {"role": "user", "content": "hello"},
+            ],
+            "stream": True,
+        })
+        for data in res:
+            if data["choices"]:
+                choice = data["choices"][0]
+                if choice["finish_reason"] in ["stop", "length"]:
+                    assert "content" not in choice["delta"]
+                else:
+                    assert choice["finish_reason"] is None
+                    content += choice["delta"]["content"] or ''
+    except ServerError as e:
+        ex = e
+
+    if success:
+        assert ex is None
+        assert len(content) > 0
+    else:
+        assert ex is not None
+        assert content == ""
+
+
+def _get_model_status(model_id: str) -> str:
+    res = server.make_request("GET", "/models")
+    assert res.status_code == 200
+    for item in res.body.get("data", []):
+        if item.get("id") == model_id or item.get("model") == model_id:
+            return item["status"]["value"]
+    raise AssertionError(f"Model {model_id} not found in /models response")
+
+
+def _wait_for_model_status(model_id: str, desired: set[str], timeout: int = 60) -> str:
+    deadline = time.time() + timeout
+    last_status = None
+    while time.time() < deadline:
+        last_status = _get_model_status(model_id)
+        if last_status in desired:
+            return last_status
+        time.sleep(1)
+    raise AssertionError(
+        f"Timed out waiting for {model_id} to reach {desired}, last status: {last_status}"
+    )
+
+
+def _load_model_and_wait(
+    model_id: str, timeout: int = 60, headers: dict | None = None
+) -> None:
+    load_res = server.make_request(
+        "POST", "/models/load", data={"model": model_id}, headers=headers
+    )
+    assert load_res.status_code == 200
+    assert isinstance(load_res.body, dict)
+    assert load_res.body.get("success") is True
+    _wait_for_model_status(model_id, {"loaded"}, timeout=timeout)
+
+
+def test_router_unload_model():
+    global server
+    server.start()
+    model_id = "ggml-org/tinygemma3-GGUF:Q8_0"
+
+    _load_model_and_wait(model_id)
+
+    unload_res = server.make_request("POST", "/models/unload", data={"model": model_id})
+    assert unload_res.status_code == 200
+    assert unload_res.body.get("success") is True
+    _wait_for_model_status(model_id, {"unloaded"})
+
+
+def test_router_models_max_evicts_lru():
+    global server
+    server.models_max = 2
+    server.start()
+
+    candidate_models = [
+        "ggml-org/tinygemma3-GGUF:Q8_0",
+        "ggml-org/test-model-stories260K",
+        "ggml-org/test-model-stories260K-infill",
+    ]
+
+    # Load only the first 2 models to fill the cache
+    first, second, third = candidate_models[:3]
+
+    _load_model_and_wait(first, timeout=120)
+    _load_model_and_wait(second, timeout=120)
+
+    # Verify both models are loaded
+    assert _get_model_status(first) == "loaded"
+    assert _get_model_status(second) == "loaded"
+
+    # Load the third model - this should trigger LRU eviction of the first model
+    _load_model_and_wait(third, timeout=120)
+
+    # Verify eviction: third is loaded, first was evicted
+    assert _get_model_status(third) == "loaded"
+    assert _get_model_status(first) == "unloaded"
+
+
+def test_router_no_models_autoload():
+    global server
+    server.no_models_autoload = True
+    server.start()
+    model_id = "ggml-org/tinygemma3-GGUF:Q8_0"
+
+    res = server.make_request(
+        "POST",
+        "/v1/chat/completions",
+        data={
+            "model": model_id,
+            "messages": [{"role": "user", "content": "hello"}],
+            "max_tokens": 4,
+        },
+    )
+    assert res.status_code == 400
+    assert "error" in res.body
+
+    _load_model_and_wait(model_id)
+
+    success_res = server.make_request(
+        "POST",
+        "/v1/chat/completions",
+        data={
+            "model": model_id,
+            "messages": [{"role": "user", "content": "hello"}],
+            "max_tokens": 4,
+        },
+    )
+    assert success_res.status_code == 200
+    assert "error" not in success_res.body
+
+
+def test_router_api_key_required():
+    global server
+    server.api_key = "sk-router-secret"
+    server.start()
+
+    model_id = "ggml-org/tinygemma3-GGUF:Q8_0"
+    auth_headers = {"Authorization": f"Bearer {server.api_key}"}
+
+    res = server.make_request(
+        "POST",
+        "/v1/chat/completions",
+        data={
+            "model": model_id,
+            "messages": [{"role": "user", "content": "hello"}],
+            "max_tokens": 4,
+        },
+    )
+    assert res.status_code == 401
+    assert res.body.get("error", {}).get("type") == "authentication_error"
+
+    _load_model_and_wait(model_id, headers=auth_headers)
+
+    authed = server.make_request(
+        "POST",
+        "/v1/chat/completions",
+        headers=auth_headers,
+        data={
+            "model": model_id,
+            "messages": [{"role": "user", "content": "hello"}],
+            "max_tokens": 4,
+        },
+    )
+    assert authed.status_code == 200
+    assert "error" not in authed.body