Unit test to verify dechunking with hand crafted package borders

t/chunked_termination.t

@@ -0,0 +1,52 @@
+use strict;
+
+use Test::More;
+
+{
+    package Starman::Server;
+
+    # Override the sysread method enabling it to read a stream of packages
+    # from an arrayref instead of an file handle:
+    use subs 'sysread';
+
+    *Starman::Server::sysread = sub {
+        if (ref $_[0] eq "ARRAY") {
+            die "EWOULDBLOCK\n" unless @{ $_[0] };
+
+            $_[1] = shift @{ $_[0] };
+            return length $_[1];
+        }
+
+        return CORE::sysread($_[0], $_[1], $_[2]);
+    };
+
+}
+
+use Starman::Server;
+
+my $server = {
+    server => {
+        client => [
+            "3\015\012foo\015\012", # Full chunk
+            "3\015\012bar",         # Chunk missing terminating HTTP newline
+            "\015\012",             # ... and then the termination
+            "0\015\012",            # Empty chunk to mark end of stream
+        ],
+    }
+};
+
+my $env = {
+    HTTP_TRANSFER_ENCODING => 'chunked',
+};
+
+my $blocked;
+eval {
+    Starman::Server::_prepare_env( $server, $env );
+    1;
+} or do {
+    $blocked = 1 if $@ =~ /^EWOULDBLOCK$/;
+};
+
+ok( !$blocked, "Reading chunked encoding does not block on well-placed package borders" );
+
+done_testing;