test(validate): added tests for function and command validation

tests/test_validate.py

@@ -0,0 +1,25 @@
+from os import chown
+
+import pytest
+
+from workflow.lifecycle.validate import command, function
+
+
+def test_validate_function():
+    """Test the validate function function."""
+    result = function("os.chown")
+    assert result == chown
+
+    # Test function import error
+    with pytest.raises(ImportError):
+        function("os.path")
+
+
+def test_validate_command():
+    """Test the validate command function."""
+    result = command("ls")
+    assert result is True
+
+    # Test invalid command
+    result = command("invalid_command")
+    assert result is False