# -*- coding: utf-8 -*-

# MIT License
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# Copyright 2018-2024 New York University Abu Dhabi
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"""
Tests for camel_tools.utils.stringutils
"""

from camel_tools.utils.stringutils import isunicode


class TestIsUnicodeString(object):
    """Test class for testing the isunicode function.
    """

    def test_isunicode_none(self):
        """Test that None is not a unicdoe string.
        """

        assert not isunicode(None)

    def test_isunicode_int(self):
        """Test that int (a primitive type) is not a unicode string.
        """

        assert not isunicode(0)

    def test_isunicode_list(self):
        """Test that a list (a Python object) is not a unicode string.
        """

        assert not isunicode(['hello', 'world'])

    def test_isunicode_byte(self):
        """Test that an explicit byte string is not a Unicode string.
        """

        assert not isunicode(b'Hello, world!')

    def test_isunicode_str(self):
        """Test that the default string type in Python 3 is a unicode string
        but not in Python 2.
        """

        assert isunicode('Hello, world!')

    def test_isunicode_unicode(self):
        """Test that a unicode literal is a unicode string.
        """

        assert isunicode(u'Hello, world!')
