test: convert tests to use show

Signed-off-by: Charlie Doern <cdoern@redhat.com>

tests/unit/distribution/test_stack_show.py

@@ -0,0 +1,45 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import argparse
+from io import StringIO
+from unittest.mock import patch
+
+from llama_stack.cli.stack._show import (
+    run_stack_show_command,
+)
+
+
+def test_stack_show_basic():
+    args = argparse.Namespace(
+        config=None,
+        distro=None,
+        env_name="test-env",
+        providers="inference=remote::ollama",
+    )
+
+    with patch("sys.stdout", new_callable=StringIO) as mock_stdout:
+        run_stack_show_command(args)
+        output = mock_stdout.getvalue()
+
+        assert "# Dependencies for test-env" in output
+        assert "uv pip install" in output
+
+
+def test_stack_show_with_distro():
+    args = argparse.Namespace(
+        config=None,
+        distro="starter",
+        env_name=None,
+        providers=None,
+    )
+
+    with patch("sys.stdout", new_callable=StringIO) as mock_stdout:
+        run_stack_show_command(args)
+        output = mock_stdout.getvalue()
+
+        assert "# Dependencies for starter" in output
+        assert "uv pip install" in output