Add test for validate pattern name

tests/units/test_basic.py

@@ -10,6 +10,7 @@
 
 import pytest
 
+from ansible_creator.arg_parser import Parser
 from ansible_creator.cli import Cli
 from ansible_creator.config import Config
 from ansible_creator.output import Output
@@ -486,3 +487,40 @@ def test_config_post_init(
     )
     config.__post_init__()
     assert config.project == "playbook"
+
+
+def test_valid_pattern_name() -> None:
+    """Test the _valid_pattern_name function.
+
+    Raises:
+        AssertionError: If the assertion fails.
+    """
+    parser = Parser()
+
+    # Test valid pattern names
+    valid_names = [
+        "my_pattern",
+        "weather_forecast",
+        "test123",
+        "pattern_name_123",
+        "a" * 63,  # Maximum length
+        "abc",  # Minimum length
+    ]
+    for name in valid_names:
+        result = parser._valid_pattern_name(name)
+        assert result == name
+        assert len(parser.pending_logs) == 0
+
+    # Test invalid pattern names - starts with underscore
+    parser.pending_logs.clear()
+    result = parser._valid_pattern_name("_invalid")
+    assert result == "_invalid"
+    assert len(parser.pending_logs) == 1
+    assert "cannot begin with an underscore" in parser.pending_logs[0].message
+
+    # Test invalid pattern names - too short
+    parser.pending_logs.clear()
+    result = parser._valid_pattern_name("ab")
+    assert result == "ab"
+    assert len(parser.pending_logs) == 1
+    assert "longer than 2 characters" in parser.pending_logs[0].message