new file mode 100644
--- /dev/null
+++ b/js_dump.t
@@ -0,0 +1,122 @@
+#!/usr/bin/perl
+
+# (C) Dmitry Volyntsev
+# (C) Nginx, Inc.
+
+# Tests for http njs module, request object dump.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+use Socket qw/ CRLF /;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/http rewrite/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    js_include test.js;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location /njs {
+            js_content test_njs;
+        }
+
+        location /dump {
+            js_content test_dump;
+        }
+
+        location /stringify {
+            js_content test_stringify;
+        }
+
+        location /stringify_subrequest {
+            js_content test_stringify_subrequest;
+        }
+
+        location /js_sub {
+            return 201 '{$request_method}';
+        }
+    }
+}
+
+EOF
+
+$t->write_file('test.js', <<EOF);
+    function test_njs(r) {
+        r.return(200, njs.version);
+    }
+
+    function test_dump(r) {
+        r.headersOut.baz = 'bar';
+        r.return(200, njs.dump(r));
+    }
+
+    function test_stringify(r) {
+        r.headersOut.baz = 'bar';
+        var obj = JSON.parse(JSON.stringify(r));
+        r.return(200, JSON.stringify(obj));
+    }
+
+    function test_stringify_subrequest(r) {
+        r.subrequest('/js_sub', reply => {
+            r.return(200, JSON.stringify(reply))
+        });
+    }
+
+EOF
+
+$t->try_run('no njs dump')->plan(3);
+
+###############################################################################
+
+TODO: {
+local $TODO = 'not yet'
+               unless http_get('/njs') =~ /^([.0-9]+)$/m && $1 ge '0.3.8';
+
+like(http(
+	'GET /dump?v=1&t=x HTTP/1.0' . CRLF
+	. 'Foo: bar' . CRLF
+	. 'Foo2: bar2' . CRLF
+	. 'Host: localhost' . CRLF . CRLF
+), qr/method:'GET'/, 'njs.dump(r)');
+
+like(http(
+	'GET /stringify?v=1&t=x HTTP/1.0' . CRLF
+	. 'Foo: bar' . CRLF
+	. 'Foo2: bar2' . CRLF
+	. 'Host: localhost' . CRLF . CRLF
+), qr/headersOut":\{"baz":"bar"}/, 'JSON.stringify(r)');
+
+like(http(
+	'GET /stringify_subrequest HTTP/1.0' . CRLF
+	. 'Host: localhost' . CRLF . CRLF
+), qr/responseBody":"\{GET}"/, 'JSON.stringify(reply)');
+
+}
+
+###############################################################################