1Test::Identity(3) User Contributed Perl Documentation Test::Identity(3)
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6 "Test::Identity" - assert the referential identity of a reference
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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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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 [], {}'
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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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53 identical( $got, $expected, $name )
54 Asserts that $got refers to the same object as $expected.
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57 Paul Evans <leonerd@leonerd.org.uk>
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61perl v5.36.0 2022-07-22 Test::Identity(3)