Add model adapter unit tests

tests/test_mt_bench_model_adapter.py

@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# Third Party
+import pytest
+
+# First Party
+from instructlab.eval.mt_bench_model_adapter import (
+    GraniteAdapter,
+    MistralAdapter,
+    get_conversation_template,
+    get_model_adapter,
+)
+
+MISTRAL_DEFAULT_MODEL_NAME = "mistral"
+EXAMPLE_MISTRAL_MODEL_PATHS = [
+    "mistral",
+    "mistralai/Mixtral-8x7B-Instruct-v0.1",
+    "/cache/instructlab/models/mistral-7b-instruct-v0.2.Q4_K_M.gguf",
+    "prometheus-eval/prometheus-8x7b-v2.0",
+    "/cache/instructlab/models/prometheus-eval/prometheus-8x7b-v2.0",
+]
+
+GRANITE_DEFAULT_MODEL_NAME = "granite"
+EXAMPLE_GRANITE_MODEL_PATHS = [
+    "granite",
+    "instructlab/granite-7b-lab",
+    "/cache/instructlab/models/instructlab/granite-7b-lab.gguf",
+    "instructlab/granite-8b-lab",
+]
+
+TEST_TUPLES = [
+    (
+        MISTRAL_DEFAULT_MODEL_NAME,
+        EXAMPLE_MISTRAL_MODEL_PATHS,
+        MistralAdapter,
+        MISTRAL_DEFAULT_MODEL_NAME,
+    ),
+    (
+        GRANITE_DEFAULT_MODEL_NAME,
+        EXAMPLE_GRANITE_MODEL_PATHS,
+        GraniteAdapter,
+        "ibm-generic",
+    ),
+]
+
+
+def test_get_model_adapter():
+    for model, model_paths, adapter, _ in TEST_TUPLES:
+        for model_path in model_paths:
+            assert isinstance(get_model_adapter(model_path, model), adapter)
+
+    # Test default adapter overrides as expected
+    assert isinstance(get_model_adapter("", MISTRAL_DEFAULT_MODEL_NAME), MistralAdapter)
+
+
+def test_get_model_adapter_not_found():
+    with pytest.raises(ValueError):
+        get_model_adapter("unknown", "unknown")
+
+
+def test_get_conversation_template():
+    for model, model_paths, _, conv_template_name in TEST_TUPLES:
+        for model_path in model_paths:
+            assert (
+                conv_template_name == get_conversation_template(model_path, model).name
+            )