Tests: basic upstream zone tests.
diff --git a/upstream_zone.t b/upstream_zone.t
new file mode 100644
index 0000000..6ffc3a0
--- /dev/null
+++ b/upstream_zone.t
@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for upstream zone.
+
+###############################################################################
+
+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()->has(qw/http proxy upstream_zone/)->plan(2)
+ ->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+ %%TEST_GLOBALS_HTTP%%
+
+ upstream u {
+ zone u 1m;
+ server 127.0.0.1:8081;
+ }
+
+ upstream u2 {
+ zone u;
+ server 127.0.0.1:8081 down;
+ server 127.0.0.1:8081 backup down;
+ }
+
+ server {
+ listen 127.0.0.1:8081;
+ server_name localhost;
+
+ location / {}
+ }
+
+ server {
+ listen 127.0.0.1:8080;
+ server_name localhost;
+
+ add_header X-Name $upstream_addr always;
+
+ location / {
+ proxy_pass http://u/;
+ }
+
+ location /down {
+ proxy_pass http://u2/;
+ }
+ }
+}
+
+EOF
+
+$t->write_file('index.html', '');
+$t->run();
+
+###############################################################################
+
+my $p = port(8081);
+
+TODO: {
+todo_skip 'leaves coredump', 2 unless $^O ne 'MSWin32'
+ or $ENV{TEST_NGINX_UNSAFE} or $t->has_version('1.13.4');
+
+like(http_get('/'), qr/X-Name: 127.0.0.1:$p/, 'upstream name');
+like(http_get('/down'), qr/X-Name: u2/, 'no live upstreams');
+
+}
+
+###############################################################################