from chrysacase import ChrysalideTestCase
from gi.repository import GObject
from pychrysalide.glibext import StringBuilder


class TestStringBuilder(ChrysalideTestCase):
    """Test cases for pychrysalide.glibext.StringBuilder."""


    def testStringBuilderCreation(self):
        """Create objects with StringBuilder interface."""

        with self.assertRaisesRegex(NotImplementedError, 'StringBuilder can not be constructed'):

            sc = StringBuilder()

        class NewStringBuilderImplem(GObject.Object, StringBuilder):
            pass

        nsi = NewStringBuilderImplem()

        self.assertIsNotNone(nsi)


    def testStringBuilderMethods(self):
        """Test the StringBuilder methods."""

        class BasicStringBuilderImplem(GObject.Object, StringBuilder):

            def __init__(self, desc):
                super().__init__()
                self._desc = desc

            def _to_string(self, flags=0):
                return self._desc

        desc = 'simple_desc'

        sb = BasicStringBuilderImplem(desc)

        self.assertEqual(sb.to_string(), desc)
        self.assertEqual(str(sb), desc)
        self.assertEqual(f'{sb}', desc)