Test::Unit::Assertion:UsereContributed Perl DTest::Unit::Assertion::CodeRef(3)NAMETest::Unit::Assertion::CodeRef - A delayed evaluation assertion using a
Coderef
SYNOPSIS
require Test::Unit::Assertion::CodeRef;
my $assert_eq =
Test::Unit::Assertion::CodeRef->new(sub {
$_[0] eq $_[1]
or Test::Unit::Failure->throw(-text =>
"Expected '$_[0]', got '$_[1]'\n");
});
$assert_eq->do_assertion('foo', 'bar');
Although this is how you'd use Test::Unit::Assertion::CodeRef directly,
it is more usually used indirectly via Test::Unit::Test::assert, which
instantiates a Test::Unit::Assertion::CodeRef when passed a Coderef as
its first argument.
IMPLEMENTSTest::Unit::Assertion::CodeRef implements the Test::Unit::Assertion
interface, which means it can be plugged into the Test::Unit::TestCase
and friends' "assert" method with no ill effects.
DESCRIPTION
This class is used by the framework to allow us to do assertions in a
'functional' manner. It is typically used generated automagically in
code like:
$self->assert(sub {
$_[0] == $_[1]
or $self->fail("Expected $_[0], got $_[1]");
}, 1, 2);
(Note that if Damian Conway's Perl6 RFC for currying ever comes to pass
then we'll be able to do this as:
$self->assert(^1 == ^2 || $self->fail("Expected ^1, got ^2"), 1, 2)
which will be nice...)
If you have a working B::Deparse installed with your perl installation
then, if an assertion fails, you'll see a listing of the decompiled
coderef (which will be sadly devoid of comments, but should still be
useful)
AUTHOR
Copyright (c) 2001 Piers Cawley <pdcawley@iterative-software.com>.
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
· Test::Unit::TestCase
· Test::Unit::Assertion
perl v5.14.1 2002-01-08 Test::Unit::Assertion::CodeRef(3)
