1Test::Identity(3)     User Contributed Perl Documentation    Test::Identity(3)
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NAME

6       "Test::Identity" - assert the referential identity of a reference
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SYNOPSIS

9        use Test::More tests => 2;
10        use Test::Identity;
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12        use Thingy;
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14        {
15           my $thingy;
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17           sub get_thingy { return $thingy }
18           sub set_thingy { $thingy = shift; }
19        }
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21        identical( get_thingy, undef, 'get_thingy is undef' );
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23        my $test_thingy = Thingy->new;
24        set_thingy $test_thingy;
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26        identical( get_thingy, $thingy, 'get_thingy is now $test_thingy' );
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DESCRIPTION

29       This module provides a single testing function, "identical". It asserts
30       that a given reference is as expected; that is, it either refers to the
31       same object or is "undef". It is similar to "Test::More::is" except
32       that it uses "refaddr", ensuring that it behaves correctly even if the
33       references under test are objects that overload stringification or
34       numification.
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36       It also provides better diagnostics if the test fails:
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38        $ perl -MTest::More=tests,1 -MTest::Identity -e'identical [], {}'
39        1..1
40        not ok 1
41        #   Failed test at -e line 1.
42        # Expected an anonymous HASH ref, got an anonymous ARRAY ref
43        # Looks like you failed 1 test of 1.
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45        $ perl -MTest::More=tests,1 -MTest::Identity -e'identical [], []'
46        1..1
47        not ok 1
48        #   Failed test at -e line 1.
49        # Expected an anonymous ARRAY ref to the correct object
50        # Looks like you failed 1 test of 1.
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FUNCTIONS

53   identical( $got, $expected, $name )
54       Asserts that $got refers to the same object as $expected.
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AUTHOR

57       Paul Evans <leonerd@leonerd.org.uk>
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61perl v5.30.1                      2020-01-30                 Test::Identity(3)