Test::Future(3pm) User Contributed Perl Documentation Test::Future(3pm)
NAME
"Test::Future" - unit test assertions for Future instances
SYNOPSIS
use Test::More tests => 2;
use Test::Future;
no_pending_futures {
my $f = some_function();
is( $f->get, "result", 'Result of the some_function()' );
} 'some_function() leaves no pending Futures';
DESCRIPTION
This module provides unit testing assertions that may be useful when
testing code based on, or using Future instances or subclasses.
FUNCTIONS
no_pending_futures
no_pending_futures( \&code, $name )
Since version 0.29.
Runs the given block of code, while keeping track of every "Future"
instance constructed while doing so. After the code has returned, each
of these instances are inspected to check that they are not still
pending. If they are all either ready (by success or failure) or
cancelled, the test will pass. If any are still pending then the test
fails.
If Devel::MAT is installed, it will be used to write a memory state
dump after a failure. It will create a .pmat file named the same as the
unit test, but with the trailing .t suffix replaced with -TEST.pmat
where "TEST" is the number of the test that failed (in case there was
more than one). A list of addresses of "Future" instances that are
still pending is also printed to assist in debugging the issue.
It is not an error if the code does not construct any "Future"
instances at all. The block of code may contain other testing
assertions; they will be run before the assertion by
"no_pending_futures" itself.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.36.0 2022-10-30 Test::Future(3pm)
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