"""
Copyright (C) 2025 Matthew Au-Yeung.

Licensed 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.
"""

import unittest

from pyjavapoet.util import is_ascii_upper


class UtilTest(unittest.TestCase):
    """Test utility functions."""

    def test_is_ascii_upper(self):
        """Test is_ascii_upper function."""
        self.assertTrue(is_ascii_upper("ABC"))
        self.assertFalse(is_ascii_upper("abc"))
        self.assertFalse(is_ascii_upper("123"))
        self.assertFalse(is_ascii_upper(""))
        self.assertFalse(is_ascii_upper(" "))


if __name__ == "__main__":
    unittest.main()
