Fix: Prevent Breeze crash when self-upgrade check fails (#65656)

* Fix: Prevent Breeze crash when self-upgrade check fails

* test: add unit tests for Breeze self-upgrade check

* style: rename test file and update breeze images

Author: mscsy0104

dev/breeze/src/airflow_breeze/utils/path_utils.py

@@ -131,17 +131,19 @@ def reinstall_if_setup_changed() -> bool:
     Prints warning if detected airflow sources are not the ones that Breeze was installed with.
     :return: True if warning was printed.
     """
-
-    res = subprocess.run(
-        ["uv", "tool", "upgrade", "apache-airflow-breeze"],
-        cwd=MY_BREEZE_ROOT_PATH,
-        check=True,
-        text=True,
-        capture_output=True,
-    )
-    if "Modified" in res.stderr:
-        inform_about_self_upgrade()
-        return True
+    try:
+        res = subprocess.run(
+            ["uv", "tool", "upgrade", "apache-airflow-breeze"],
+            cwd=MY_BREEZE_ROOT_PATH,
+            check=False,
+            text=True,
+            capture_output=True,
+        )
+        if res.returncode == 0 and "Modified" in res.stderr:
+            inform_about_self_upgrade()
+            return True
+    except FileNotFoundError:
+        pass
     return False
 
 

dev/breeze/tests/test_reinstall_if_setup_changed.py

@@ -0,0 +1,54 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+from __future__ import annotations
+
+from unittest.mock import MagicMock, patch
+
+from airflow_breeze.utils.path_utils import reinstall_if_setup_changed
+
+
+def test_reinstall_if_setup_changed_when_uv_not_installed():
+    """Test that it returns False without error when the uv command is not found (FileNotFoundError)."""
+    with patch("subprocess.run", side_effect=FileNotFoundError):
+        # Should return False without any exception occurring during execution.
+        result = reinstall_if_setup_changed()
+        assert result is False
+
+
+def test_reinstall_if_setup_changed_when_not_a_uv_tool():
+    """Test when uv is present but 'apache-airflow-breeze' is not installed as a tool (exit 1)."""
+    mock_res = MagicMock()
+    mock_res.returncode = 1
+    mock_res.stderr = "error: apache-airflow-breeze is not installed"
+
+    with patch("subprocess.run", return_value=mock_res):
+        # Should return False and not crash even if the subprocess fails (returncode 1).
+        result = reinstall_if_setup_changed()
+        assert result is False
+
+
+def test_reinstall_if_setup_changed_success_and_modified():
+    """Test that it returns True when successfully upgraded and content is modified."""
+    mock_res = MagicMock()
+    mock_res.returncode = 0
+    mock_res.stderr = "Modified /Users/path/to/breeze"
+
+    with patch("subprocess.run", return_value=mock_res):
+        with patch("airflow_breeze.utils.path_utils.inform_about_self_upgrade") as mock_inform:
+            result = reinstall_if_setup_changed()
+            assert result is True
+            mock_inform.assert_called_once()