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        app    => sub { $args->{app}->({ %{ $_[0] }, %extra_env }) },
        client => sub {
            my ($psgi_app) = @_;
            my $resp = $psgi_app->($request);
            $args->{mangle_response}->($resp) if $args->{mangle_response};
            $ret = $resp;
        };

    return $ret;
}

sub _local_request {
    my $class = shift;

    return _request({
        app => ref($class) eq "CODE" ? $class : $class->_finalized_psgi_app,
        mangle_response => sub {
            my ($resp) = @_;

            # HTML head parsing based on LWP::UserAgent
            #
            # This is because if you make a remote request with LWP, then the
            # <BASE HREF="..."> from the returned HTML document will be used
            # to fill in $res->base, as documented in HTTP::Response. We need
            # to support this in local test requests so that they work 'the same'.
            #
            # This is not just horrible and possibly broken, but also really
            # doesn't belong here. Whoever wants this should be working on
            # getting it into Plack::Test, or make a middleware out of it, or
            # whatever. Seriously - horrible.

            if (!$resp->content_type || $resp->content_is_html) {
                require HTML::HeadParser;

                my $parser = HTML::HeadParser->new();
                $parser->xml_mode(1) if $resp->content_is_xhtml;
                $parser->utf8_mode(1) if $] >= 5.008 && $HTML::Parser::VERSION >= 3.40;

                $parser->parse( $resp->content );
                my $h = $parser->header;
                for my $f ( $h->header_field_names ) {
                    $resp->init_header( $f, [ $h->header($f) ] );
                }
            }
            # Another horrible hack to make the response headers have a
            # 'status' field. This is for back-compat, but you should
            # call $resp->code instead!
            $resp->init_header('status', [ $resp->code ]);
        },
    }, @_);
}

my $agent;

sub _remote_request {
    require LWP::UserAgent;
    local $Plack::Test::Impl = 'ExternalServer';

    unless ($agent) {
        $agent = LWP::UserAgent->new(
            keep_alive   => 1,
            max_redirect => 0,
            timeout      => 60,

            # work around newer LWP max_redirect 0 bug
            # http://rt.cpan.org/Ticket/Display.html?id=40260
            requests_redirectable => [],
        );

        $agent->env_proxy;
    }


    my $server = URI->new($ENV{CATALYST_SERVER});
    if ( $server->path =~ m|^(.+)?/$| ) {
        my $path = $1;
        $server->path("$path") if $path;    # need to be quoted
    }

    return _request({
        ua             => $agent,
        uri            => $server,
        mangle_request => sub {
            my ($request) = @_;

            # the request path needs to be sanitised if $server is using a
            # non-root path due to potential overlap between request path and
            # response path.
            if ($server->path) {
                # If request path is '/', we have to add a trailing slash to the
                # final request URI
                my $add_trailing = ($request->uri->path eq '/' || $request->uri->path eq '') ? 1 : 0;

                my @sp = split '/', $server->path;
                my @rp = split '/', $request->uri->path;
                shift @sp; shift @rp; # leading /
                if (@rp) {
                    foreach my $sp (@sp) {
                        $sp eq $rp[0] ? shift @rp : last
                    }
                }
                $request->uri->path(join '/', @rp);

                if ( $add_trailing ) {
                    $request->uri->path( $request->uri->path . '/' );
                }
            }
        },
    }, @_);
}

for my $name (qw(local_request remote_request)) {
    my $fun = sub {
        carp <<"EOW";
Calling Catalyst::Test::${name}() directly is deprecated.

Please import Catalyst::Test into your namespace and use the provided request()
function instead.
EOW
        return __PACKAGE__->can("_${name}")->(@_);
    };