diff options
Diffstat (limited to 'Lib/test/test_math.py')
| -rw-r--r-- | Lib/test/test_math.py | 61 |
1 files changed, 30 insertions, 31 deletions
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 715003a..48f84ba 100644 --- a/Lib/test/test_math.py +++ b/Lib/test/test_math.py @@ -980,38 +980,37 @@ class MathTests(unittest.TestCase): # still fails this part of the test on some platforms. For now, we only # *run* test_exceptions() in verbose mode, so that this isn't normally # tested. + @unittest.skipUnless(verbose, 'requires verbose mode') + def test_exceptions(self): + try: + x = math.exp(-1000000000) + except: + # mathmodule.c is failing to weed out underflows from libm, or + # we've got an fp format with huge dynamic range + self.fail("underflowing exp() should not have raised " + "an exception") + if x != 0: + self.fail("underflowing exp() should have returned 0") + + # If this fails, probably using a strict IEEE-754 conforming libm, and x + # is +Inf afterwards. But Python wants overflows detected by default. + try: + x = math.exp(1000000000) + except OverflowError: + pass + else: + self.fail("overflowing exp() didn't trigger OverflowError") - if verbose: - def test_exceptions(self): - try: - x = math.exp(-1000000000) - except: - # mathmodule.c is failing to weed out underflows from libm, or - # we've got an fp format with huge dynamic range - self.fail("underflowing exp() should not have raised " - "an exception") - if x != 0: - self.fail("underflowing exp() should have returned 0") - - # If this fails, probably using a strict IEEE-754 conforming libm, and x - # is +Inf afterwards. But Python wants overflows detected by default. - try: - x = math.exp(1000000000) - except OverflowError: - pass - else: - self.fail("overflowing exp() didn't trigger OverflowError") - - # If this fails, it could be a puzzle. One odd possibility is that - # mathmodule.c's macros are getting confused while comparing - # Inf (HUGE_VAL) to a NaN, and artificially setting errno to ERANGE - # as a result (and so raising OverflowError instead). - try: - x = math.sqrt(-1.0) - except ValueError: - pass - else: - self.fail("sqrt(-1) didn't raise ValueError") + # If this fails, it could be a puzzle. One odd possibility is that + # mathmodule.c's macros are getting confused while comparing + # Inf (HUGE_VAL) to a NaN, and artificially setting errno to ERANGE + # as a result (and so raising OverflowError instead). + try: + x = math.sqrt(-1.0) + except ValueError: + pass + else: + self.fail("sqrt(-1) didn't raise ValueError") @requires_IEEE_754 def test_testfile(self): |