5 use Config; # to determine nvsize
6 use Test::More tests => 23;
7 use List::Util qw( uniqnum );
9 is_deeply( [ uniqnum qw( 1 1.0 1E0 2 3 ) ],
11 'uniqnum compares numbers' );
13 is_deeply( [ uniqnum qw( 1 1.1 1.2 1.3 ) ],
15 'uniqnum distinguishes floats' );
18 my @nums = map $_+0.1, 1e7..1e7+5;
19 is_deeply( [ uniqnum @nums ],
21 'uniqnum distinguishes large floats' );
23 my @strings = map "$_", @nums;
24 is_deeply( [ uniqnum @strings ],
26 'uniqnum distinguishes large floats (stringified)' );
29 my ($uniq_count1, $uniq_count2, $equiv);
31 if($Config{nvsize} == 8) {
32 # NV is either 'double' or 8-byte 'long double'
34 # The 2 values should be unequal - but just in case perl is buggy:
35 $equiv = 1 if 1.4142135623730951 == 1.4142135623730954;
37 $uniq_count1 = uniqnum (1.4142135623730951,
40 $uniq_count2 = uniqnum('1.4142135623730951',
41 '1.4142135623730954' );
44 elsif(length(sqrt(2)) > 25) {
45 # NV is either IEEE 'long double' or '__float128' or doubledouble
47 if(1 + (2 ** -1074) != 1) {
50 # The 2 values should be unequal - but just in case perl is buggy:
51 $equiv = 1 if 1 + (2 ** -1074) == 1 + (2 ** - 1073);
53 $uniq_count1 = uniqnum (1 + (2 ** -1074),
55 # The 2 values should be unequal - but just in case perl is buggy:
56 $equiv = 1 if 4.0564819207303340847894502572035e31 == 4.0564819207303340847894502572034e31;
58 $uniq_count2 = uniqnum('4.0564819207303340847894502572035e31',
59 '4.0564819207303340847894502572034e31' );
63 # NV is either IEEE 'long double' or '__float128'
65 # The 2 values should be unequal - but just in case perl is buggy:
66 $equiv = 1 if 1005.10228292019306452029161597769015 == 1005.1022829201930645202916159776901;
68 $uniq_count1 = uniqnum (1005.10228292019306452029161597769015,
69 1005.1022829201930645202916159776901 );
71 $uniq_count2 = uniqnum('1005.10228292019306452029161597769015',
72 '1005.1022829201930645202916159776901' );
77 # NV is extended precision 'long double'
79 # The 2 values should be unequal - but just in case perl is buggy:
80 $equiv = 1 if 10.770329614269008063 == 10.7703296142690080625;
82 $uniq_count1 = uniqnum (10.770329614269008063,
83 10.7703296142690080625 );
85 $uniq_count2 = uniqnum('10.770329614269008063',
86 '10.7703296142690080625' );
90 is($uniq_count1, 1, 'uniqnum preserves uniqueness of high precision floats');
91 is($uniq_count2, 1, 'uniqnum preserves uniqueness of high precision floats (stringified)');
95 is($uniq_count1, 2, 'uniqnum preserves uniqueness of high precision floats');
96 is($uniq_count2, 2, 'uniqnum preserves uniqueness of high precision floats (stringified)');
100 skip ('test not relevant for this perl configuration', 1) unless $Config{nvsize} == 8
101 && $Config{ivsize} == 8;
103 my @in = (~0, ~0 - 1, 18446744073709551614.0, 18014398509481985, 1.8014398509481985e16);
106 # On perl-5.6.2 (and perhaps other old versions), ~0 - 1 is assigned to an NV.
107 # This affects the outcome of the following test, so we need to first determine
108 # whether ~0 - 1 is an NV or a UV:
110 if("$in[1]" eq "1.84467440737096e+19") {
112 # It's an NV and $in[2] is a duplicate of $in[1]
113 @correct = (~0, ~0 - 1, 18014398509481985, 1.8014398509481985e16);
117 # No duplicates in @in
121 is_deeply( [ uniqnum @in ],
123 'uniqnum correctly compares UV/IVs that overflow NVs' );
126 my $ls = 31; # maximum left shift for 32-bit unity
128 if( $Config{ivsize} == 8 ) {
129 $ls = 63; # maximum left shift for 64-bit unity
132 # Populate @in with UV-NV pairs of equivalent values.
133 # Each of these values is exactly representable as
134 # either a UV or an NV.
136 my @in = (1 << $ls, 2 ** $ls,
137 1 << ($ls - 3), 2 ** ($ls - 3),
138 5 << ($ls - 3), 5 * (2 ** ($ls - 3)));
140 my @correct = (1 << $ls, 1 << ($ls - 3), 5 << ($ls -3));
142 if( $Config{ivsize} == 8 && $Config{nvsize} == 8 ) {
144 # Add some more UV-NV pairs of equivalent values.
145 # Each of these values is exactly representable
146 # as either a UV or an NV.
148 push @in, ( 9007199254740991, 9.007199254740991e+15,
149 9007199254740992, 9.007199254740992e+15,
150 9223372036854774784, 9.223372036854774784e+18,
151 18446744073709549568, 1.8446744073709549568e+19,
152 18446744073709139968, 1.8446744073709139968e+19,
153 100000000000262144, 1.00000000000262144e+17,
154 100000000001310720, 1.0000000000131072e+17,
155 144115188075593728, 1.44115188075593728e+17,
156 -9007199254740991, -9.007199254740991e+15,
157 -9007199254740992, -9.007199254740992e+15,
158 -9223372036854774784, -9.223372036854774784e+18,
159 -18446744073709549568, -1.8446744073709549568e+19,
160 -18446744073709139968, -1.8446744073709139968e+19,
161 -100000000000262144, -1.00000000000262144e+17,
162 -100000000001310720, -1.0000000000131072e+17,
163 -144115188075593728, -1.44115188075593728e+17 );
165 push @correct, ( 9007199254740991,
168 18446744073709549568,
169 18446744073709139968,
175 -9223372036854774784,
176 -18446744073709549568,
177 -18446744073709139968,
180 -144115188075593728 );
183 # uniqnum should discard each of the NVs as being a
184 # duplicate of the preceding UV.
186 is_deeply( [ uniqnum @in],
188 'uniqnum correctly compares UV/IVs that don\'t overflow NVs' );
190 # Hard to know for sure what an Inf is going to be. Lets make one
191 my $Inf = 0 + 1E1000;
193 $Inf **= 1000 while ( $NaN = $Inf - $Inf ) == $NaN;
195 is_deeply( [ uniqnum 0, 1, 12345, $Inf, -$Inf, $NaN, 0, $Inf, $NaN ],
196 [ 0, 1, 12345, $Inf, -$Inf, $NaN ],
197 'uniqnum preserves the special values of +-Inf and Nan' );
201 my $maxint = ~0 >> 1;
202 my $minint = -(~0 >> 1) - 1;
204 my @nums = ($maxuint, $maxuint-1, -1, $maxint, $minint, 1 );
207 use warnings FATAL => 'numeric';
214 my $nanish = "$NaN" + 0;
215 $nanish != 0 && !$nanish != $NaN;
221 is_deeply( [ uniqnum @nums, 1.0 ],
223 'uniqnum preserves uniqueness of full integer range' );
225 my @strs = map "$_", @nums;
227 if($maxuint !~ /\A[0-9]+\z/) {
228 skip( "Perl $] doesn't stringify UV_MAX right ($maxuint)", 1 );
231 is_deeply( [ uniqnum @strs, "1.0" ],
233 'uniqnum preserves uniqueness of full integer range (stringified)' );
237 my @nums = (6.82132005170133e-38, 62345678);
238 is_deeply( [ uniqnum @nums ], [ @nums ],
239 'uniqnum keeps uniqueness of numbers that stringify to the same byte pattern as a float'
245 local $SIG{__WARN__} = sub { $warnings .= join "", @_ };
247 is_deeply( [ uniqnum 0, undef ],
249 'uniqnum considers undef and zero equivalent' );
251 ok( length $warnings, 'uniqnum on undef yields a warning' );
253 is_deeply( [ uniqnum undef ],
255 'uniqnum on undef coerces to zero' );
258 is_deeply( [uniqnum 0, -0.0 ],
260 'uniqnum handles negative zero');
263 skip ('test not relevant for this perl configuration', 4) unless $Config{ivsize} == 8;
265 # 1e17 is the number beyond which "%.20g" formatting fails on some
267 # The following 2 tests check that the nearest values (both above
268 # and below that tipping point) are being handled correctly.
270 # 99999999999999984 is the largest 64-bit integer less than 1e17
271 # that can be expressed exactly as a double
273 is_deeply( [ uniqnum (99999999999999984, 99999999999999984.0) ],
274 [ (99999999999999984) ],
275 'uniqnum recognizes 99999999999999984 and 99999999999999984.0 as the same' );
277 is_deeply( [ uniqnum (-99999999999999984, -99999999999999984.0) ],
278 [ (-99999999999999984) ],
279 'uniqnum recognizes -99999999999999984 and -99999999999999984.0 as the same' );
281 # 100000000000000016 is the smallest positive 64-bit integer greater than 1e17
282 # that can be expressed exactly as a double
284 is_deeply( [ uniqnum (100000000000000016, 100000000000000016.0) ],
285 [ (100000000000000016) ],
286 'uniqnum recognizes 100000000000000016 and 100000000000000016.0 as the same' );
288 is_deeply( [ uniqnum (-100000000000000016, -100000000000000016.0) ],
289 [ (-100000000000000016) ],
290 'uniqnum recognizes -100000000000000016 and -100000000000000016.0 as the same' );
293 # uniqnum not confused by IV'ified floats
295 # This fails on 5.6 and isn't fixable without breaking a lot of other tests
296 skip 'This perl version gets confused by IVNV dualvars', 1 if $] lt '5.008000';
297 my @nums = ( 2.1, 2.2, 2.3 );
298 my $dummy = sprintf "%d", $_ for @nums;
300 # All @nums now have both NOK and IOK but IV=2 in each case
301 is( scalar( uniqnum @nums ), 3, 'uniqnum not confused by dual IV+NV' );
307 use overload '0+' => sub { return $_[0]->{num} };
309 sub new { bless { num => $_[1] }, $_[0] }
312 use Scalar::Util qw( refaddr );
314 my @nums = map { Numify->new( $_ ) } qw( 2 2 5 );
316 # is_deeply wants to use eq overloading
317 my @ret = uniqnum @nums;
318 ok( scalar @ret == 2 &&
319 refaddr $ret[0] == refaddr $nums[0] &&
320 refaddr $ret[1] == refaddr $nums[2],
321 'uniqnum respects numify overload' );
325 "1 1 2" =~ m/(.) (.) (.)/;
326 is_deeply( [ uniqnum $1, $2, $3 ],
328 'uniqnum handles magic' );