[Refactor] Relocate entrypoint tests to match serving code structure (#37593)

Signed-off-by: sfeng33 <4florafeng@gmail.com>

tests/entrypoints/serve/render/test_launch_render.py

@@ -0,0 +1,193 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""E2E tests for render endpoints via `vllm launch` (GPU-less serving)."""
+
+import httpx
+import pytest
+import pytest_asyncio
+
+from tests.utils import RemoteLaunchRenderServer
+
+MODEL_NAME = "hmellor/tiny-random-LlamaForCausalLM"
+
+
+@pytest.fixture(scope="module")
+def server():
+    args: list[str] = []
+    with RemoteLaunchRenderServer(MODEL_NAME, args, max_wait_seconds=120) as srv:
+        yield srv
+
+
+@pytest_asyncio.fixture
+async def client(server):
+    async with httpx.AsyncClient(
+        base_url=server.url_for(""), timeout=30.0
+    ) as http_client:
+        yield http_client
+
+
+# -- Chat Completion Render --
+
+
+@pytest.mark.asyncio
+async def test_chat_render_basic(client):
+    response = await client.post(
+        "/v1/chat/completions/render",
+        json={
+            "model": MODEL_NAME,
+            "messages": [{"role": "user", "content": "Hello, how are you?"}],
+        },
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+
+    # Response should be a GenerateRequest dict
+    assert isinstance(data, dict)
+    assert "token_ids" in data
+    assert isinstance(data["token_ids"], list)
+    assert len(data["token_ids"]) > 0
+    assert all(isinstance(t, int) for t in data["token_ids"])
+
+
+@pytest.mark.asyncio
+async def test_chat_render_multi_turn(client):
+    response = await client.post(
+        "/v1/chat/completions/render",
+        json={
+            "model": MODEL_NAME,
+            "messages": [
+                {"role": "user", "content": "Hello"},
+                {"role": "assistant", "content": "Hi there!"},
+                {"role": "user", "content": "How are you?"},
+            ],
+        },
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+
+    assert isinstance(data, dict)
+    assert "token_ids" in data
+    assert isinstance(data["token_ids"], list)
+    assert len(data["token_ids"]) > 0
+
+
+@pytest.mark.asyncio
+async def test_chat_render_invalid_model(client):
+    response = await client.post(
+        "/v1/chat/completions/render",
+        json={
+            "model": "nonexistent-model",
+            "messages": [{"role": "user", "content": "Hello"}],
+        },
+    )
+
+    assert response.status_code == 404
+    assert "error" in response.json()
+
+
+# -- Completion Render --
+
+
+@pytest.mark.asyncio
+async def test_completion_render_basic(client):
+    response = await client.post(
+        "/v1/completions/render",
+        json={
+            "model": MODEL_NAME,
+            "prompt": "Once upon a time",
+        },
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+
+    assert isinstance(data, list)
+    assert len(data) > 0
+
+    first_prompt = data[0]
+    assert "token_ids" in first_prompt
+    assert "sampling_params" in first_prompt
+    assert "model" in first_prompt
+    assert "request_id" in first_prompt
+    assert isinstance(first_prompt["token_ids"], list)
+    assert len(first_prompt["token_ids"]) > 0
+    assert first_prompt["request_id"].startswith("cmpl-")
+
+
+@pytest.mark.asyncio
+async def test_completion_render_multiple_prompts(client):
+    response = await client.post(
+        "/v1/completions/render",
+        json={
+            "model": MODEL_NAME,
+            "prompt": ["Hello world", "Goodbye world"],
+        },
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+
+    assert isinstance(data, list)
+    assert len(data) == 2
+
+    for prompt in data:
+        assert "token_ids" in prompt
+        assert "sampling_params" in prompt
+        assert "model" in prompt
+        assert "request_id" in prompt
+        assert len(prompt["token_ids"]) > 0
+        assert prompt["request_id"].startswith("cmpl-")
+
+
+@pytest.mark.asyncio
+async def test_completion_render_invalid_model(client):
+    response = await client.post(
+        "/v1/completions/render",
+        json={
+            "model": "nonexistent-model",
+            "prompt": "Hello",
+        },
+    )
+
+    assert response.status_code == 404
+    assert "error" in response.json()
+
+
+@pytest.mark.asyncio
+async def test_render_is_fast(client):
+    """Render should complete quickly since there is no inference."""
+    import time
+
+    start = time.perf_counter()
+    response = await client.post(
+        "/v1/completions/render",
+        json={
+            "model": MODEL_NAME,
+            "prompt": "Tell me a very long story about " * 10,
+        },
+    )
+    elapsed = time.perf_counter() - start
+
+    assert response.status_code == 200
+    assert elapsed < 2.0
+
+
+# -- Health & Models --
+
+
+@pytest.mark.asyncio
+async def test_health_endpoint(client):
+    response = await client.get("/health")
+    assert response.status_code == 200
+
+
+@pytest.mark.asyncio
+async def test_models_endpoint(client):
+    response = await client.get("/v1/models")
+    assert response.status_code == 200
+    data = response.json()
+    assert "data" in data
+    model_ids = [m["id"] for m in data["data"]]
+    assert MODEL_NAME in model_ids