Method test_braced_override

Lib/test/test_string/test_string.py:388–403

(self)

        self.assertRaises(ValueError, s.safe_substitute, {})

    def test_braced_override(self):
        class MyTemplate(Template):
            pattern = r"""
            \$(?:
              (?P<escaped>$)                     |
              (?P<named>[_a-z][_a-z0-9]*)        |
              @@(?P<braced>[_a-z][_a-z0-9]*)@@   |
              (?P<invalid>)                      |
           )
           """

        tmpl = 'PyCon in $@@location@@'
        t = MyTemplate(tmpl)
        self.assertRaises(KeyError, t.substitute, {})
        val = t.substitute({'location': 'Cleveland'})
        self.assertEqual(val, 'PyCon in Cleveland')

    def test_braced_override_safe(self):
        class MyTemplate(Template):