Tests: added tests for js_body_filter directive.
diff --git a/js_body_filter.t b/js_body_filter.t
new file mode 100644
index 0000000..b90a250
--- /dev/null
+++ b/js_body_filter.t
@@ -0,0 +1,168 @@
+#!/usr/bin/perl
+
+# (C) Dmitry Volyntsev
+# (C) Nginx, Inc.
+
+# Tests for http njs module, body filter.
+
+###############################################################################
+
+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 $t = Test::Nginx->new()->has(qw/http proxy/)
+ ->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+ %%TEST_GLOBALS_HTTP%%
+
+ js_import test.js;
+
+ server {
+ listen 127.0.0.1:8080;
+ server_name localhost;
+
+ location /njs {
+ js_content test.njs;
+ }
+
+ location /append {
+ js_body_filter test.append;
+ proxy_pass http://127.0.0.1:8081/source;
+ }
+
+ location /buffer_type {
+ js_body_filter test.buffer_type buffer_type=buffer;
+ proxy_pass http://127.0.0.1:8081/source;
+ }
+
+ location /forward {
+ js_body_filter test.forward buffer_type=string;
+ proxy_pass http://127.0.0.1:8081/source;
+ }
+
+ location /filter {
+ proxy_buffering off;
+ js_body_filter test.filter;
+ proxy_pass http://127.0.0.1:8081/source;
+ }
+
+ location /prepend {
+ js_body_filter test.prepend;
+ proxy_pass http://127.0.0.1:8081/source;
+ }
+ }
+
+ server {
+ listen 127.0.0.1:8081;
+ server_name localhost;
+
+ location /source {
+ postpone_output 1;
+ js_content test.source;
+ }
+ }
+}
+
+EOF
+
+$t->write_file('test.js', <<EOF);
+ function test_njs(r) {
+ r.return(200, njs.version);
+ }
+
+ function append(r, data, flags) {
+ r.sendBuffer(data, {last:false});
+
+ if (flags.last) {
+ r.sendBuffer("XXX", flags);
+ }
+ }
+
+ var collect = Buffer.from([]);
+ function buffer_type(r, data, flags) {
+ collect = Buffer.concat([collect, data]);
+
+ if (flags.last) {
+ r.sendBuffer(collect, flags);
+ }
+ }
+
+ function chain(chunks, i) {
+ if (i < chunks.length) {
+ chunks.r.send(chunks[i++]);
+ setTimeout(chunks.chain, chunks.delay, chunks, i);
+
+ } else {
+ chunks.r.finish();
+ }
+ }
+
+ function source(r) {
+ var chunks = ['AAA', 'BB', 'C', 'DDDD'];
+ chunks.delay = 5;
+ chunks.r = r;
+ chunks.chain = chain;
+
+ r.status = 200;
+ r.sendHeader();
+ chain(chunks, 0);
+ }
+
+ function filter(r, data, flags) {
+ if (flags.last || data.length >= Number(r.args.len)) {
+ r.sendBuffer(`\${data}|`, flags);
+
+ if (r.args.dup && !flags.last) {
+ r.sendBuffer(data, flags);
+ }
+ }
+ }
+
+ function forward(r, data, flags) {
+ r.sendBuffer(data, flags);
+ }
+
+ function prepend(r, data, flags) {
+ r.sendBuffer("XXX");
+ r.sendBuffer(data, flags);
+ r.done();
+ }
+
+ export default {njs: test_njs, append, buffer_type, filter, forward,
+ prepend, source};
+
+EOF
+
+$t->try_run('no njs body filter')->plan(6);
+
+###############################################################################
+
+like(http_get('/append'), qr/AAABBCDDDDXXX/, 'append');
+like(http_get('/buffer_type'), qr/AAABBCDDDD/, 'buffer type');
+like(http_get('/forward'), qr/AAABBCDDDD/, 'forward');
+like(http_get('/filter?len=3'), qr/AAA|DDDD|/, 'filter 3');
+like(http_get('/filter?len=2&dup=1'), qr/AAA|AAABB|BBDDDD|DDDD/,
+ 'filter 2 dup');
+like(http_get('/prepend'), qr/XXXAAABBCDDDD/, 'prepend');
+
+###############################################################################
