Tests: "limit_req .. delay" tests.
diff --git a/limit_req_delay.t b/limit_req_delay.t
new file mode 100644
index 0000000..21eb113
--- /dev/null
+++ b/limit_req_delay.t
@@ -0,0 +1,65 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for nginx limit_req module, delay parameter.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx qw/ :DEFAULT http_end /;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/http limit_req/);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+ %%TEST_GLOBALS_HTTP%%
+
+ limit_req_zone $binary_remote_addr zone=one:1m rate=1r/s;
+
+ server {
+ listen 127.0.0.1:8080;
+ server_name localhost;
+
+ location / {
+ limit_req zone=one delay=1 burst=2;
+ add_header X-Time $request_time;
+ }
+ }
+}
+
+EOF
+
+$t->write_file('delay.html', 'XtestX');
+$t->try_run('no limit_req delay')->plan(4);
+
+###############################################################################
+
+like(http_get('/delay.html'), qr/^HTTP\/1.. 200 /m, 'request');
+like(http_get('/delay.html'), qr/X-Time: 0.000/, 'not yet delayed');
+my $s = http_get('/delay.html', start => 1, sleep => 0.2);
+like(http_get('/delay.html'), qr/^HTTP\/1.. 503 /m, 'rejected');
+like(http_end($s), qr/^HTTP\/1.. 200 .*X-Time: (?!0.000)/ms, 'delayed');
+
+###############################################################################
