Plack::Test - Test PSGI applications with various backends
use Plack::Test; # named params test_psgi app => sub { my $env = shift; return [ 200, [ 'Content-Type' => 'text/plain' ], [ "Hello World" ] ], }, client => sub { my $cb = shift; my $req = HTTP::Request->new(GET => "http://localhost/hello"); my $res = $cb->($req); like $res->content, qr/Hello World/; }; use HTTP::Request::Common; # positional params (app, client) my $app = sub { return [ 200, [], [ "Hello "] ] }; test_psgi $app, sub { my $cb = shift; my $res = $cb->(GET "/"); is $res->content, "Hello"; };
Plack::Test is a unified interface to test PSGI applications using HTTP::Request and HTTP::Response objects. It also allows you to run PSGI applications in various ways. The default backend is Plack::Test::MockHTTP, but you may also use any Plack::Handler implementation to run live HTTP requests against at web server
Plack::Test::MockHTTP
test_psgi $app, $client; test_psgi app => $app, client => $client;
Runs the client test code $client against a PSGI application $app. The client callback gets one argument $cb, a callback that accepts an HTTP::Request object and returns an HTTP::Response object.
$client
$app
$cb
HTTP::Request
HTTP::Response
Use HTTP::Request::Common to import shortcuts for creating requests for GET, POST, DELETE, and PUT operations.
GET
POST
DELETE
PUT
For your convenience, the HTTP::Request given to the callback automatically uses the HTTP protocol and the localhost (127.0.0.1 by default), so the following code just works:
use HTTP::Request::Common; test_psgi $app, sub { my $cb = shift; my $res = $cb->(GET "/hello"); };
Note that however, it is not a good idea to pass an arbitrary (i.e. user-input) string to GET or even HTTP::Request->new by assuming that it always represents a path, because:
HTTP::Request->new
my $req = GET "//foo/bar";
would represent a request for a URL that has no scheme, has a hostname foo and a path /bar, instead of a path //foo/bar which you might actually want.
Specify the Plack::Test backend using the environment variable PLACK_TEST_IMPL or $Plack::Test::Impl package variable.
PLACK_TEST_IMPL
$Plack::Test::Impl
The available values for the backend are:
(Default) Creates a PSGI env hash out of HTTP::Request object, runs the PSGI application in-process and returns HTTP::Response.
Runs one of Plack::Handler backends (Standalone by default) and sends live HTTP requests to test.
Standalone
Runs tests against an external server specified in the PLACK_TEST_EXTERNALSERVER_URI environment variable instead of spawning the application in a server locally.
PLACK_TEST_EXTERNALSERVER_URI
For instance, test your application with the HTTP::Server::ServerSimple server backend with:
HTTP::Server::ServerSimple
> env PLACK_TEST_IMPL=Server PLACK_SERVER=HTTP::Server::ServerSimple \ prove -l t/test.t
Tatsuhiko Miyagawa
To install Plack, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Plack
CPAN shell
perl -MCPAN -e shell install Plack
For more information on module installation, please visit the detailed CPAN module installation guide.