Use packaging.version.Version for 0.0.0 check; add unit tests

Agent-Logs-Url: https://github.com/Azure/azure-sdk-for-python/sessions/4ebec9df-c06c-4b15-a0a9-97e80d6dc045

Co-authored-by: msyyc <70930885+msyyc@users.noreply.github.com>

Author: Copilot

eng/tools/azure-sdk-tools/packaging_tools/package_utils.py

@@ -1,6 +1,7 @@
 import re
 import sys
 import os
+from packaging.version import Version
 import ast
 import shutil
 from importlib.util import find_spec
@@ -70,7 +71,7 @@ def get_version_info(package_name: str, tag_is_stable: bool = False) -> Tuple[st
         last_stable_release = ""
 
     # Ignore 0.0.0 when it appears on PyPI as a placeholder or name-reservation version.
-    if last_version.startswith("0.0.0"):
+    if last_version and Version(last_version).base_version == "0.0.0":
         return "", ""
 
     return last_version, str(last_stable_release)

eng/tools/azure-sdk-tools/tests/test_package_utils.py

@@ -1,5 +1,7 @@
 from pathlib import Path
 import os
+from unittest.mock import patch, MagicMock
+from packaging.version import Version
 
 try:
     import tomllib as toml
@@ -69,3 +71,39 @@ def test_check_file_sets_is_stable_false_for_beta(tmp_path, monkeypatch):
     assert data["packaging"]["is_stable"] is False
     # title still populated
     assert data["packaging"]["title"] == "FooClient"
+
+
+def test_get_version_info_treats_0_0_0_as_invalid():
+    """get_version_info should return empty strings when the latest PyPI version is 0.0.0."""
+    with patch("pypi_tools.pypi.PyPIClient") as MockClient:
+        mock_client = MagicMock()
+        MockClient.return_value = mock_client
+        mock_client.get_ordered_versions.return_value = [Version("0.0.0")]
+
+        result = pu.get_version_info("azure-some-package", tag_is_stable=False)
+
+    assert result == ("", "")
+
+
+def test_get_version_info_treats_0_0_0_prerelease_as_invalid():
+    """get_version_info should return empty strings when the latest PyPI version is 0.0.0b1."""
+    with patch("pypi_tools.pypi.PyPIClient") as MockClient:
+        mock_client = MagicMock()
+        MockClient.return_value = mock_client
+        mock_client.get_ordered_versions.return_value = [Version("0.0.0b1")]
+
+        result = pu.get_version_info("azure-some-package", tag_is_stable=False)
+
+    assert result == ("", "")
+
+
+def test_get_version_info_does_not_filter_0_0_0_1():
+    """get_version_info should NOT filter 0.0.0.1 — its base version is not 0.0.0."""
+    with patch("pypi_tools.pypi.PyPIClient") as MockClient:
+        mock_client = MagicMock()
+        MockClient.return_value = mock_client
+        mock_client.get_ordered_versions.return_value = [Version("0.0.0.1")]
+
+        result = pu.get_version_info("azure-some-package", tag_is_stable=False)
+
+    assert result != ("", "")