/usr/lib/python3.5/test/decimaltestdata/ddClass.decTest is in libpython3.5-testsuite 3.5.1-10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- ddClass.decTest -- decDouble Class operations --
-- 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
-- [New 2006.11.27]
precision: 16
maxExponent: 384
minExponent: -383
extended: 1
clamp: 1
rounding: half_even
ddcla001 class 0 -> +Zero
ddcla002 class 0.00 -> +Zero
ddcla003 class 0E+5 -> +Zero
ddcla004 class 1E-396 -> +Subnormal
ddcla005 class 0.1E-383 -> +Subnormal
ddcla006 class 0.999999999999999E-383 -> +Subnormal
ddcla007 class 1.000000000000000E-383 -> +Normal
ddcla008 class 1E-383 -> +Normal
ddcla009 class 1E-100 -> +Normal
ddcla010 class 1E-10 -> +Normal
ddcla012 class 1E-1 -> +Normal
ddcla013 class 1 -> +Normal
ddcla014 class 2.50 -> +Normal
ddcla015 class 100.100 -> +Normal
ddcla016 class 1E+30 -> +Normal
ddcla017 class 1E+384 -> +Normal
ddcla018 class 9.999999999999999E+384 -> +Normal
ddcla019 class Inf -> +Infinity
ddcla021 class -0 -> -Zero
ddcla022 class -0.00 -> -Zero
ddcla023 class -0E+5 -> -Zero
ddcla024 class -1E-396 -> -Subnormal
ddcla025 class -0.1E-383 -> -Subnormal
ddcla026 class -0.999999999999999E-383 -> -Subnormal
ddcla027 class -1.000000000000000E-383 -> -Normal
ddcla028 class -1E-383 -> -Normal
ddcla029 class -1E-100 -> -Normal
ddcla030 class -1E-10 -> -Normal
ddcla032 class -1E-1 -> -Normal
ddcla033 class -1 -> -Normal
ddcla034 class -2.50 -> -Normal
ddcla035 class -100.100 -> -Normal
ddcla036 class -1E+30 -> -Normal
ddcla037 class -1E+384 -> -Normal
ddcla038 class -9.999999999999999E+384 -> -Normal
ddcla039 class -Inf -> -Infinity
ddcla041 class NaN -> NaN
ddcla042 class -NaN -> NaN
ddcla043 class +NaN12345 -> NaN
ddcla044 class sNaN -> sNaN
ddcla045 class -sNaN -> sNaN
ddcla046 class +sNaN12345 -> sNaN
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