✅ add test for prompt adapter

Author: prashantgupta24

tests/fixtures/bloom_sentiment_1/adapter_config.json

@@ -0,0 +1,4 @@
+{
+  "num_virtual_tokens": 8,
+  "peft_type": "PROMPT_TUNING"
+}

tests/test_adapters.py

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+from pathlib import Path
+
+import pytest
+
+from vllm_tgis_adapter.grpc.adapters import AdapterStore, validate_adapters
+from vllm_tgis_adapter.grpc.pb.generation_pb2 import (
+    BatchedGenerationRequest,
+)
+
+FIXTURES_DIR = Path(__file__).parent / "fixtures"
+
+
+@pytest.mark.asyncio
+async def test_validate_adapters():
+    adapter_name = "bloom_sentiment_1"
+    request = BatchedGenerationRequest(
+        adapter_id=adapter_name,
+    )
+
+    adapters = await validate_adapters(
+        request, AdapterStore(cache_path=FIXTURES_DIR, adapters={})
+    )
+    assert "prompt_adapter_request" in adapters
+    assert adapters["prompt_adapter_request"].prompt_adapter_name == adapter_name
+    adapter_path = adapters["prompt_adapter_request"].prompt_adapter_local_path
+    assert adapter_path is not None
+
+    assert Path.exists(Path(adapter_path) / "adapter_config.json")
+    assert Path.exists(Path(adapter_path) / "adapter_model.safetensors")