NAME
    Test::NoWarnings - Make sure you didn't emit any warnings while testing

SYNOPSIS
    For scripts that have no plan

      use Test::NoWarnings;

    that's it, you don't need to do anything else

    For scripts that look like

      use Test::More tests => x;

    change to

      use Test::More tests => x + 1;
      use Test::NoWarnings;

DESCRIPTION
    In general, your tests shouldn't produce warnings. This modules causes
    any warnings to be captured and stored. It automatically adds an extra
    test that will run when your script ends to check that there were no
    warnings. If there were any warings, the test will give a "not ok" and
    diagnostics of where, when and what the warning was, including a stack
    trace of what was going on when the it occurred.

    If some of your tests are supposed to produce warnings then you should
    be capturing and checking them with Test::Warn, that way
    Test::NoWarnings will not see them and so not complain.

    The test is run by an END block in Test::NoWarnings. It will not be run
    when any forked children exit.

USAGE
    Simply by using the module, you automatically get an extra test at the
    end of your script that checks that no warnings were emitted. So just
    stick

      use Test::NoWarnings

    at the top of your script and continue as normal.

    If you want more control you can invoke the test manually at any time
    with "had_no_warnings()".

    The warnings your test has generated so far are stored in an array. You
    can look inside and clear this whenever you want with "warnings()" and
    "clear_warnings()", however, if you are doing this sort of thing then
    you probably want to use Test::Warn in combination with
    Test::NoWarnings.

USE vs REQUIRE
    You will almost always want to do

      use Test::NoWarnings

    If you do a "require" rather than a "use", then there will be no
    automatic test at the end of your script.

OUTPUT
    If warning is captured during your test then the details will output as
    part of the diagnostics. You will get:

    o the number and name of the test that was executed just before the
      warning (if no test had been executed these will be 0 and '')

    o the message passed to "warn",

    o a full dump of the stack when warn was called, courtesy of the "Carp"
      module

EXPORTABLE FUNCTIONS
  had_no_warnings
    This checks that there have been warnings emitted by your test scripts.
    Usually you will not call this explicitly as it is called automatically
    when your script finishes.

  clear_warnings
    This will clear the array of warnings that have been captured. If the
    array is empty then a call to "had_no_warnings()" will produce a pass
    result.

  warnings
    This will return the array of warnings captured so far. Each element of
    this array is an object containing information about the warning. The
    following methods are available on these object.

    * $warn->getMessage

      Get the message that would been printed by the warning.

    * $warn->getCarp

      Get a stack trace of what was going on when the warning happened, this
      stack trace is just a string generated by the Carp module.

    * $warn->getTrace

      Get a stack trace object generated by the Devel::StackTrace module.
      This will return undef if Devel::StackTrace is not installed.

    * $warn->getTest

      Get the number of the test that executed before the warning was
      emitted.

    * $warn->getTestName

      Get the name of the test that executed before the warning was emitted.

PITFALLS
    When counting your tests for the plan, don't forget to include the test
    that runs automatically when your script ends.

SUPPORT
    Bugs should be reported via the CPAN bug tracker at

    <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-NoWarnings>

    For other issues, contact the author.

HISTORY
    This was previously known as Test::Warn::None

SEE ALSO
    Test::Builder, Test::Warn

AUTHORS
    Fergal Daly <fergal@esatclear.ie>

    Adam Kennedy <adamk@cpan.org>

COPYRIGHT
    Copyright 2003 - 2007 Fergal Daly.

    Some parts copyright 2010 Adam Kennedy.

    This program is free software and comes with no warranty. It is
    distributed under the LGPL license

    See the file LGPL included in this distribution or
    http://www.fsf.org/licenses/licenses.html.

