test: add comprehensive version alias tests for HuggingFace image URIs

- Fix existing test_retrieve_huggingface assertions to expect resolved
  versions (4.2.1) instead of raw aliases (4.2) in image tags
- Add parametrized test covering all 25 version aliases across training
  and inference scopes to verify aliases resolve correctly in tags
- Add parametrized test covering all 26 non-aliased (full) versions to
  confirm no regression when passing complete version strings directly

Made-with: Cursor

Author: giangle-AI

sagemaker-core/tests/unit/image_uris/test_retrieve.py

@@ -670,7 +670,7 @@ def test_retrieve_huggingface(config_for_framework):
     )
     assert (
         "564829616587.dkr.ecr.us-east-1.amazonaws.com/huggingface-pytorch-training:"
-        "1.6-transformers4.2-gpu-py37-cu110-ubuntu18.04" == pt_uri_mv
+        "1.6-transformers4.2.1-gpu-py37-cu110-ubuntu18.04" == pt_uri_mv
     )
 
     pt_uri = image_uris.retrieve(
@@ -715,7 +715,7 @@ def test_retrieve_huggingface(config_for_framework):
     )
     assert (
         "564829616587.dkr.ecr.us-east-1.amazonaws.com/huggingface-pytorch-training:"
-        "1.6.0-transformers4.3.1-gpu-py37-cu110-ubuntu18.04" == pt_new_version
+        "1.6.0-transformers4.2.1-gpu-py37-cu110-ubuntu18.04" == pt_new_version
     )
 
 
@@ -787,6 +787,88 @@ def test_get_latest_version_function_with_no_framework(config_for_framework):
         assert "No framework config for framework" in str(e.exception)
 
 
+def _get_huggingface_alias_test_cases():
+    """Build parametrized test cases for every HuggingFace version alias."""
+    config = image_uris.config_for_framework("huggingface")
+    cases = []
+    for scope in ("training", "inference"):
+        section = config[scope]
+        aliases = section.get("version_aliases", {})
+        for alias, resolved in aliases.items():
+            ver_cfg = section["versions"][resolved]
+            base_fws = [k for k in ver_cfg if k != "version_aliases"]
+            base_fw = base_fws[0]
+            py_ver = ver_cfg[base_fw]["py_versions"][0]
+            inst = "ml.p3.2xlarge" if scope == "training" else "ml.c5.xlarge"
+            cases.append(
+                pytest.param(scope, alias, resolved, base_fw, py_ver, inst,
+                             id=f"{scope}-{alias}->{resolved}")
+            )
+    return cases
+
+
+def _get_huggingface_full_version_test_cases():
+    """Build parametrized test cases for every non-aliased HuggingFace version."""
+    config = image_uris.config_for_framework("huggingface")
+    cases = []
+    for scope in ("training", "inference"):
+        section = config[scope]
+        for full_ver, ver_cfg in section["versions"].items():
+            base_fws = [k for k in ver_cfg if k != "version_aliases"]
+            base_fw = base_fws[0]
+            py_ver = ver_cfg[base_fw]["py_versions"][0]
+            inst = "ml.p3.2xlarge" if scope == "training" else "ml.c5.xlarge"
+            cases.append(
+                pytest.param(scope, full_ver, base_fw, py_ver, inst,
+                             id=f"{scope}-{full_ver}")
+            )
+    return cases
+
+
+@pytest.mark.parametrize(
+    "scope,alias,resolved,base_fw,py_ver,instance_type",
+    _get_huggingface_alias_test_cases(),
+)
+def test_huggingface_version_alias_resolves_in_tag(
+    scope, alias, resolved, base_fw, py_ver, instance_type
+):
+    """Version aliases must be resolved to full versions in image URI tags."""
+    uri = image_uris.retrieve(
+        framework="huggingface",
+        region="us-east-1",
+        version=alias,
+        py_version=py_ver,
+        image_scope=scope,
+        base_framework_version=base_fw,
+        instance_type=instance_type,
+    )
+    assert f"transformers{resolved}-" in uri, (
+        f"Expected resolved version 'transformers{resolved}-' in URI, got: {uri}"
+    )
+
+
+@pytest.mark.parametrize(
+    "scope,full_version,base_fw,py_ver,instance_type",
+    _get_huggingface_full_version_test_cases(),
+)
+def test_huggingface_full_version_in_tag(
+    scope, full_version, base_fw, py_ver, instance_type
+):
+    """Full (non-aliased) versions must appear unchanged in image URI tags."""
+    uri = image_uris.retrieve(
+        framework="huggingface",
+        region="us-east-1",
+        version=full_version,
+        py_version=py_ver,
+        image_scope=scope,
+        base_framework_version=base_fw,
+        instance_type=instance_type,
+    )
+    assert f"transformers{full_version}-" in uri, (
+        f"Expected full version 'transformers{full_version}-' in URI, got: {uri}"
+    )
+
+
 @pytest.mark.parametrize(
     "framework",
     [