/usr/lib/python2.7/test/decimaltestdata/inexact.decTest is in libpython2.7-testsuite 2.7.6-8.
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-- inexact.decTest -- decimal inexact and rounded edge cases --
-- Copyright (c) IBM Corporation, 1981, 2008. All rights reserved. --
------------------------------------------------------------------------
-- Please see the document "General Decimal Arithmetic Testcases" --
-- at http://www2.hursley.ibm.com/decimal for the description of --
-- these testcases. --
-- --
-- These testcases are experimental ('beta' versions), and they --
-- may contain errors. They are offered on an as-is basis. In --
-- particular, achieving the same results as the tests here is not --
-- a guarantee that an implementation complies with any Standard --
-- or specification. The tests are not exhaustive. --
-- --
-- Please send comments, suggestions, and corrections to the author: --
-- Mike Cowlishaw, IBM Fellow --
-- IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK --
-- mfc@uk.ibm.com --
------------------------------------------------------------------------
version: 2.59
extended: 1
precision: 9
rounding: half_up
maxExponent: 999
minexponent: -999
inx001 add 1 1 -> 2
inx002 add 123456789 0 -> 123456789
inx003 add 123456789 0.0 -> 123456789 Rounded
inx004 add 123456789 0.00 -> 123456789 Rounded
inx005 add 123456789 1 -> 123456790
inx006 add 123456789 0.1 -> 123456789 Inexact Rounded
inx007 add 123456789 0.01 -> 123456789 Inexact Rounded
inx008 add 123456789 0.001 -> 123456789 Inexact Rounded
inx009 add 123456789 0.000001 -> 123456789 Inexact Rounded
inx010 add 123456789 0.000000001 -> 123456789 Inexact Rounded
inx011 add 123456789 0.000000000001 -> 123456789 Inexact Rounded
inx012 add 123456789 0.9 -> 123456790 Inexact Rounded
inx013 add 123456789 0.09 -> 123456789 Inexact Rounded
inx014 add 123456789 0.009 -> 123456789 Inexact Rounded
inx015 add 123456789 0.000009 -> 123456789 Inexact Rounded
inx016 add 123456789 0.000000009 -> 123456789 Inexact Rounded
inx017 add 123456789 0.000000000009 -> 123456789 Inexact Rounded
inx021 add 1 -1 -> 0
inx022 add 123456789 -0 -> 123456789
inx023 add 123456789 -0.0 -> 123456789 Rounded
inx024 add 123456789 -0.00 -> 123456789 Rounded
inx025 add 123456789 -1 -> 123456788
inx026 add 123456789 -0.1 -> 123456789 Inexact Rounded
inx027 add 123456789 -0.01 -> 123456789 Inexact Rounded
inx028 add 123456789 -0.001 -> 123456789 Inexact Rounded
inx029 add 123456789 -0.000001 -> 123456789 Inexact Rounded
inx030 add 123456789 -0.000000001 -> 123456789 Inexact Rounded
inx031 add 123456789 -0.000000000001 -> 123456789 Inexact Rounded
inx032 add 123456789 -0.9 -> 123456788 Inexact Rounded
inx033 add 123456789 -0.09 -> 123456789 Inexact Rounded
inx034 add 123456789 -0.009 -> 123456789 Inexact Rounded
inx035 add 123456789 -0.000009 -> 123456789 Inexact Rounded
inx036 add 123456789 -0.000000009 -> 123456789 Inexact Rounded
inx037 add 123456789 -0.000000000009 -> 123456789 Inexact Rounded
inx042 add 0 123456789 -> 123456789
inx043 add 0.0 123456789 -> 123456789 Rounded
inx044 add 0.00 123456789 -> 123456789 Rounded
inx045 add 1 123456789 -> 123456790
inx046 add 0.1 123456789 -> 123456789 Inexact Rounded
inx047 add 0.01 123456789 -> 123456789 Inexact Rounded
inx048 add 0.001 123456789 -> 123456789 Inexact Rounded
inx049 add 0.000001 123456789 -> 123456789 Inexact Rounded
inx050 add 0.000000001 123456789 -> 123456789 Inexact Rounded
inx051 add 0.000000000001 123456789 -> 123456789 Inexact Rounded
inx052 add 0.9 123456789 -> 123456790 Inexact Rounded
inx053 add 0.09 123456789 -> 123456789 Inexact Rounded
inx054 add 0.009 123456789 -> 123456789 Inexact Rounded
inx055 add 0.000009 123456789 -> 123456789 Inexact Rounded
inx056 add 0.000000009 123456789 -> 123456789 Inexact Rounded
inx057 add 0.000000000009 123456789 -> 123456789 Inexact Rounded
inx062 add -0 123456789 -> 123456789
inx063 add -0.0 123456789 -> 123456789 Rounded
inx064 add -0.00 123456789 -> 123456789 Rounded
inx065 add -1 123456789 -> 123456788
inx066 add -0.1 123456789 -> 123456789 Inexact Rounded
inx067 add -0.01 123456789 -> 123456789 Inexact Rounded
inx068 add -0.001 123456789 -> 123456789 Inexact Rounded
inx069 add -0.000001 123456789 -> 123456789 Inexact Rounded
inx070 add -0.000000001 123456789 -> 123456789 Inexact Rounded
inx071 add -0.000000000001 123456789 -> 123456789 Inexact Rounded
inx072 add -0.9 123456789 -> 123456788 Inexact Rounded
inx073 add -0.09 123456789 -> 123456789 Inexact Rounded
inx074 add -0.009 123456789 -> 123456789 Inexact Rounded
inx075 add -0.000009 123456789 -> 123456789 Inexact Rounded
inx076 add -0.000000009 123456789 -> 123456789 Inexact Rounded
inx077 add -0.000000000009 123456789 -> 123456789 Inexact Rounded
-- some boundaries
inx081 add 999999999 0 -> 999999999
inx082 add 0.999999999 0.000000000 -> 0.999999999
inx083 add 999999999 1 -> 1.00000000E+9 Rounded
inx084 add 0.999999999 0.000000001 -> 1.00000000 Rounded
inx085 add 999999999 2 -> 1.00000000E+9 Inexact Rounded
inx086 add 0.999999999 0.000000002 -> 1.00000000 Inexact Rounded
inx087 add 999999999 3 -> 1.00000000E+9 Inexact Rounded
inx089 add 0.999999999 0.000000003 -> 1.00000000 Inexact Rounded
-- minus, plus, and subtract all assumed to work like add.
-- multiply
precision: 8
inx101 multiply 1000 1000 -> 1000000
inx102 multiply 9000 9000 -> 81000000
inx103 multiply 9999 9999 -> 99980001
inx104 multiply 1000 10000 -> 10000000
inx105 multiply 10000 10000 -> 1.0000000E+8 Rounded
inx106 multiply 10001 10000 -> 1.0001000E+8 Rounded
inx107 multiply 10001 10001 -> 1.0002000E+8 Inexact Rounded
inx108 multiply 10101 10001 -> 1.0102010E+8 Inexact Rounded
inx109 multiply 10001 10101 -> 1.0102010E+8 Inexact Rounded
-- divide
precision: 4
inx201 divide 1000 1000 -> 1
inx202 divide 1000 1 -> 1000
inx203 divide 1000 2 -> 500
inx204 divide 1000 3 -> 333.3 Inexact Rounded
inx205 divide 1000 4 -> 250
inx206 divide 1000 5 -> 200
inx207 divide 1000 6 -> 166.7 Inexact Rounded
inx208 divide 1000 7 -> 142.9 Inexact Rounded
inx209 divide 1000 8 -> 125
inx210 divide 1000 9 -> 111.1 Inexact Rounded
inx211 divide 1000 10 -> 100
inx220 divide 1 1 -> 1
inx221 divide 1 2 -> 0.5
inx222 divide 1 4 -> 0.25
inx223 divide 1 8 -> 0.125
inx224 divide 1 16 -> 0.0625
inx225 divide 1 32 -> 0.03125
inx226 divide 1 64 -> 0.01563 Inexact Rounded
inx227 divide 1 128 -> 0.007813 Inexact Rounded
precision: 5
inx230 divide 1 1 -> 1
inx231 divide 1 2 -> 0.5
inx232 divide 1 4 -> 0.25
inx233 divide 1 8 -> 0.125
inx234 divide 1 16 -> 0.0625
inx235 divide 1 32 -> 0.03125
inx236 divide 1 64 -> 0.015625
inx237 divide 1 128 -> 0.0078125
precision: 3
inx240 divide 1 1 -> 1
inx241 divide 1 2 -> 0.5
inx242 divide 1 4 -> 0.25
inx243 divide 1 8 -> 0.125
inx244 divide 1 16 -> 0.0625
inx245 divide 1 32 -> 0.0313 Inexact Rounded
inx246 divide 1 64 -> 0.0156 Inexact Rounded
inx247 divide 1 128 -> 0.00781 Inexact Rounded
precision: 2
inx250 divide 1 1 -> 1
inx251 divide 1 2 -> 0.5
inx252 divide 1 4 -> 0.25
inx253 divide 1 8 -> 0.13 Inexact Rounded
inx254 divide 1 16 -> 0.063 Inexact Rounded
inx255 divide 1 32 -> 0.031 Inexact Rounded
inx256 divide 1 64 -> 0.016 Inexact Rounded
inx257 divide 1 128 -> 0.0078 Inexact Rounded
precision: 1
inx260 divide 1 1 -> 1
inx261 divide 1 2 -> 0.5
inx262 divide 1 4 -> 0.3 Inexact Rounded
inx263 divide 1 8 -> 0.1 Inexact Rounded
inx264 divide 1 16 -> 0.06 Inexact Rounded
inx265 divide 1 32 -> 0.03 Inexact Rounded
inx266 divide 1 64 -> 0.02 Inexact Rounded
inx267 divide 1 128 -> 0.008 Inexact Rounded
-- power
precision: 4
inx301 power 0.5 2 -> 0.25
inx302 power 0.5 4 -> 0.0625
inx303 power 0.5 8 -> 0.003906 Inexact Rounded
inx304 power 0.5 16 -> 0.00001526 Inexact Rounded
inx305 power 0.5 32 -> 2.328E-10 Inexact Rounded
-- compare, divideInteger, and remainder are always exact
-- rescale
precision: 4
inx401 rescale 0 0 -> 0
inx402 rescale 1 0 -> 1
inx403 rescale 0.1 +2 -> 0E+2 Inexact Rounded
inx404 rescale 0.1 +1 -> 0E+1 Inexact Rounded
inx405 rescale 0.1 0 -> 0 Inexact Rounded
inx406 rescale 0.1 -1 -> 0.1
inx407 rescale 0.1 -2 -> 0.10
-- long operands cause rounding too
precision: 9
inx801 plus 123456789 -> 123456789
inx802 plus 1234567890 -> 1.23456789E+9 Rounded
inx803 plus 1234567891 -> 1.23456789E+9 Inexact Rounded
inx804 plus 1234567892 -> 1.23456789E+9 Inexact Rounded
inx805 plus 1234567899 -> 1.23456790E+9 Inexact Rounded
inx806 plus 1234567900 -> 1.23456790E+9 Rounded
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