convert-differential-transformer test coverage

tests/cli/integrations/test_cli_convert_differential_transformer.py

@@ -0,0 +1,48 @@
+"""Tests for convert-differential-transformer CLI command."""
+
+from pathlib import Path
+from unittest.mock import patch
+
+from axolotl.cli.main import cli
+
+
+def test_cli_validation(cli_runner):
+    """Test CLI validation for a command.
+
+    Args:
+        cli_runner: CLI runner fixture
+    """
+    # Test missing config file
+    result = cli_runner.invoke(cli, ["convert-differential-transformer"])
+    assert result.exit_code != 0
+    assert "Error: Missing argument 'CONFIG'." in result.output
+
+    # Test non-existent config file
+    result = cli_runner.invoke(
+        cli, ["convert-differential-transformer", "nonexistent.yml"]
+    )
+    assert result.exit_code != 0
+    assert "Error: Invalid value for 'CONFIG'" in result.output
+
+
+def test_basic_execution(cli_runner, tmp_path: Path, valid_test_config: str):
+    """Test basic execution.
+
+    Args:
+        cli_runner: CLI runner fixture
+        tmp_path: Temporary path fixture
+        valid_test_config: Valid config fixture
+    """
+    config_path = tmp_path / "config.yml"
+    config_path.write_text(valid_test_config)
+
+    with patch(
+        "axolotl.cli.integrations.convert_differential_transformer.do_cli"
+    ) as mock_do_cli:
+        result = cli_runner.invoke(
+            cli, ["convert-differential-transformer", str(config_path)]
+        )
+        assert result.exit_code == 0
+
+        mock_do_cli.assert_called_once()
+        assert mock_do_cli.call_args.kwargs["config"] == str(config_path)