diff options
| -rw-r--r-- | tests/float/string_format_modulo2.py | 4 | ||||
| -rw-r--r-- | tests/float/string_format_modulo2_intbig.py | 21 |
2 files changed, 23 insertions, 2 deletions
diff --git a/tests/float/string_format_modulo2.py b/tests/float/string_format_modulo2.py index d35f2a2c02..f6b1ae537d 100644 --- a/tests/float/string_format_modulo2.py +++ b/tests/float/string_format_modulo2.py @@ -18,7 +18,7 @@ def test(num, num_str): # check pure zero test(0.0, '0.0') -# check most powers of 10, making sure to include exponents with 3 digits -for e in range(-101, 102): +# check some powers of 10, making sure to include exponents with 3 digits +for e in range(-8, 8): num = pow(10, e) test(num, '1e%d' % e) diff --git a/tests/float/string_format_modulo2_intbig.py b/tests/float/string_format_modulo2_intbig.py new file mode 100644 index 0000000000..9992ba65d9 --- /dev/null +++ b/tests/float/string_format_modulo2_intbig.py @@ -0,0 +1,21 @@ +# test formatting floats with large precision, that it doesn't overflow the buffer + +def test(num, num_str): + if num == float('inf') or num == 0.0 and num_str != '0.0': + # skip numbers that overflow or underflow the FP precision + return + for kind in ('e', 'f', 'g'): + # check precision either side of the size of the buffer (32 bytes) + for prec in range(23, 36, 2): + fmt = '%.' + '%d' % prec + kind + s = fmt % num + check = abs(float(s) - num) + if num > 1: + check /= num + if check > 1e-6: + print('FAIL', num_str, fmt, s, len(s), check) + +# check most powers of 10, making sure to include exponents with 3 digits +for e in range(-101, 102): + num = pow(10, e) + test(num, '1e%d' % e) |