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
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.
Use HTTP::Request::Common to import shortcuts for creating requests for GET, POST, DELETE, and PUT operations.
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:
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.
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.
Runs tests against an external server specified in the PLACK_TEST_EXTERNALSERVER_URI environment variable instead of spawning the application in a server locally.
For instance, test your application with the HTTP::Server::ServerSimple server backend with:
> env PLACK_TEST_IMPL=Server PLACK_SERVER=HTTP::Server::ServerSimple \
prove -l t/test.t
Tatsuhiko Miyagawa
