1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
# -*- mode: perl; -*-
use strict;
use warnings;
use Test::More tests => 5;
use Scalar::Util qw< refaddr >;
use Math::BigInt;
my ($x, $y);
note("as_float() as a class method");
$x = Math::BigInt -> as_float("2");
subtest '$x = Math::BigInt -> as_float("2");' => sub {
plan tests => 2;
is(ref($x), 'Math::BigFloat', '$x is a Math::BigFloat');
cmp_ok($x, "==", 2, '$x == 2');
};
note("as_float() as an instance method");
$x = Math::BigInt -> new("2"); $y = $x -> as_float();
subtest '$x = Math::BigInt -> new("2"); $y = $x -> as_float();' => sub {
plan tests => 4;
is(ref($x), 'Math::BigInt', '$x is a Math::BigInt');
is(ref($y), 'Math::BigFloat', '$y is a Math::BigFloat');
cmp_ok($y, "==", 2, '$y == 2');
isnt(refaddr($x), refaddr($y), '$x and $y are different objects');
};
note("as_float() returns a Math::BigFloat regardless of upgrading/downgrading");
require Math::BigFloat;
require Math::BigRat;
Math::BigInt -> upgrade("Math::BigFloat");
Math::BigFloat -> downgrade("Math::BigInt");
Math::BigFloat -> upgrade("Math::BigRat");
$x = Math::BigInt -> new("3");
$y = $x -> as_float();
subtest '$x = Math::BigInt -> new("3"); $y = $x -> as_float();' => sub {
plan tests => 3;
is(ref($x), 'Math::BigInt', 'class of $y');
is(ref($y), 'Math::BigFloat', 'class of $y');
cmp_ok($y -> numify(), "==", 3, 'value of $y');
};
$y = Math::BigInt -> as_float("3");
subtest '$y = Math::BigInt -> as_float("3");' => sub {
plan tests => 2;
is(ref($y), 'Math::BigFloat', 'class of $y');
cmp_ok($y -> numify(), "==", 3, 'value of $y');
};
# Upgrading prevents "3.5" from becoming a Math::BigInt with the value "NaN".
$y = Math::BigInt -> as_float("3.5");
subtest '$y = Math::BigInt -> as_float("3.5");' => sub {
plan tests => 2;
is(ref($y), 'Math::BigFloat', 'class of $y');
cmp_ok($y -> numify(), "==", 3.5, 'value of $y');
};
|
