def test_match_re_rules_with_failures(self):
rule0 = easyparse.RegularExpressionRule(r'[a-z]')
rule1 = easyparse.RegularExpressionRule(r'[0-9]')
buf = easyparse.BufferedIterator('7a')
buf.checkpoint()
self.assertEqual(False, rule0.parse(buf)[0])
buf.rewind()
self.assertEqual((True, '7'), rule1.parse(buf))
def test_print_backtrace_regex(self):
rule = easyparse.RegularExpressionRule('[0-9]')
ok, backtrace = rule.parse('q')
self.assertFalse(ok)
backtrace_string = self._print_backtrace_to_string(backtrace)
exp_backtrace_string = \
"""<Unnamed>: RegularExpression: Failed to match '[0-9]'\n"""
self.assertEqual(exp_backtrace_string, backtrace_string)
def test_print_backtrace_named_regex(self):
g = easyparse.Grammar()
g.num = easyparse.RegularExpressionRule('[0-9]')
ok, backtrace = g.num.parse('q')
self.assertFalse(ok)
backtrace_string = self._print_backtrace_to_string(backtrace)
exp_backtrace_string = \
"""num: RegularExpression: Failed to match '[0-9]'\n"""
self.assertEqual(exp_backtrace_string, backtrace_string)
def test_re_match_with_same_whitespace_preceding(self):
rule = easyparse.RegularExpressionRule(r' 0')
self.assertEqual((True, ' 0'), rule.parse(' 0',
allow_whitespace=True))
def test_match_two_re_rules(self):
rule0 = easyparse.RegularExpressionRule(r'[0-9]')
rule1 = easyparse.RegularExpressionRule(r'[a-z]')
buf = easyparse.BufferedIterator('a7')
self.assertEqual((True, 'a'), rule1.parse(buf))
self.assertEqual((True, '7'), rule0.parse(buf))
def test_ignore_regular_expression_rule(self):
rule = easyparse.RegularExpressionRule(r'[0-9]', ignore_output=True)
self.assertEqual((True, easyparse.Ignored), rule.parse('7'))
def test_match_regular_expression_rule(self):
rule = easyparse.RegularExpressionRule(r'[0-9]')
self.assertEqual((True, '7'), rule.parse('7'))
def test_re_rule_failure(self):
rule = easyparse.RegularExpressionRule('a')
ok, backtrace = rule.parse('b')
self.assertFalse(ok)
self.assertEqual(('', 'RegularExpression', 'a'), backtrace)