Tests: added test for reading body from IO::Handle-like object.

test/perl/body_io_fake/IOFake.pm

@@ -0,0 +1,33 @@
+package IOFake;
+
+sub new {
+    my $class = shift;
+    my $errors = shift;
+    my $self = {};
+
+    $self->{_count} = 2;
+    $self->{_errors} = $errors;
+
+    bless $self, $class;
+    return $self;
+}
+
+sub getline() {
+    my $self = shift;
+
+    if ($self->{_count} > 0) {
+        return $self->{_count}--;
+    }
+
+    $self->{_errors}->print('IOFake getline() $/ is ' . ${ $/ });
+
+    return;
+}
+
+sub close() {
+    my $self = shift;
+
+    $self->{_errors}->print('IOFake close() called');
+};
+
+1;

test/perl/body_io_fake/psgi.pl

@@ -0,0 +1,11 @@
+use File::Basename;
+use lib dirname (__FILE__);
+use IOFake;
+
+my $app = sub {
+    my ($environ) = @_;
+
+    my $io = IOFake->new($environ->{'psgi.errors'});
+
+    return ['200', [ 'Content-Length' => '2' ], $io];
+};