new file mode 100644
--- /dev/null
+++ b/expect-100-continue.t
@@ -0,0 +1,86 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Tests for Expect: 100-continue support.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->plan(2);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+master_process off;
+daemon         off;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    access_log    off;
+    root          %%TESTDIR%%;
+
+    client_body_temp_path  %%TESTDIR%%/client_body_temp;
+    fastcgi_temp_path      %%TESTDIR%%/fastcgi_temp;
+    proxy_temp_path        %%TESTDIR%%/proxy_temp;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+    }
+}
+
+EOF
+
+$t->run();
+
+###############################################################################
+
+like(http_100_request('/', '1.1'), qr/100/, 'expect 100 continue');
+
+TODO: {
+local $TODO = 'patch under review';
+
+# From RFC 2616, 8.2.3 Use of the 100 (Continue) Status:
+#
+#      - An origin server SHOULD NOT send a 100 (Continue) response if
+#        the request message does not include an Expect request-header
+#        field with the "100-continue" expectation, and MUST NOT send a
+#        100 (Continue) response if such a request comes from an HTTP/1.0
+#        (or earlier) client.
+
+unlike(http_100_request('/', '1.0'), qr/100/, 'no 100 continue via http 1.0');
+
+}
+
+###############################################################################
+
+sub http_100_request {
+	my ($url, $version) = @_;
+	my $r = http(<<EOF);
+POST $url HTTP/$version
+Host: localhost
+Expect: 100-continue
+Content-Length: 0
+Connection: close
+
+EOF
+}
+
+###############################################################################