diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/test_unit.py | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/tests/test_unit.py b/tests/test_unit.py index 65e0ddb..cdc1f59 100644 --- a/tests/test_unit.py +++ b/tests/test_unit.py @@ -2490,7 +2490,7 @@ class Test2_WithoutPackrat(ppt.TestParseResultsAsserts, TestCase): ) try: - # ~ print "lets try an invalid RE" + print("lets try an invalid RE") invRe = pp.Regex("(\"[^\"]*\")|('[^']*'") except Exception as e: print("successfully rejected an invalid RE:", end=" ") @@ -2498,7 +2498,8 @@ class Test2_WithoutPackrat(ppt.TestParseResultsAsserts, TestCase): else: self.assertTrue(False, "failed to reject invalid RE") - invRe = pp.Regex("") + with self.assertWarns(SyntaxWarning, msg="failed to warn empty string passed to Regex"): + invRe = pp.Regex("") def testRegexAsType(self): import pyparsing as pp @@ -6208,8 +6209,8 @@ class Test2_WithoutPackrat(ppt.TestParseResultsAsserts, TestCase): "failed to generate correct internal re", ) - esc_chars = r"\^-]" - esc_chars2 = r"*+.?[" + esc_chars = r"\^-][" + esc_chars2 = r"*+.?" for esc_char in esc_chars + esc_chars2: # test escape char as first character in range next_char = chr(ord(esc_char) + 1) @@ -6648,6 +6649,35 @@ class Test2_WithoutPackrat(ppt.TestParseResultsAsserts, TestCase): "multipled(3) failure with setResultsName", ) + def testWarnUsingLshiftForward(self): + import warnings + print("verify that using '<<' operator with a Forward raises a warning if there is a dangling '|' operator") + + fwd = pp.Forward() + print('unsafe << and |, but diag not enabled, should not warn') + fwd << pp.Word('a') | pp.Word('b') + + pp.__diag__.enable('warn_on_match_first_with_lshift_operator') + with self.assertWarns(SyntaxWarning, msg="failed to warn of using << and | operators"): + fwd = pp.Forward() + print('unsafe << and |, should warn') + fwd << pp.Word('a') | pp.Word('b') + + fwd = pp.Forward() + print('safe <<= and |, should not warn') + fwd <<= pp.Word('a') | pp.Word('b') + c = fwd | pp.Word('c') + + print('safe << and (|), should not warn') + with warnings.catch_warnings(record=True) as w: + warnings.simplefilter("error") + + fwd = pp.Forward() + fwd << (pp.Word('a') | pp.Word('b')) + try: + c = fwd | pp.Word('c') + except Exception as e: + self.fail("raised warning when it should not have") class PickleTest_Greeting: def __init__(self, toks): |