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#!/usr/bin/perl
# (C) Dmitry Volyntsev
# (C) Nginx, Inc.
# Tests for stream njs module, WebCrypto module.
###############################################################################
use warnings;
use strict;
use Test::More;
BEGIN { use FindBin; chdir($FindBin::Bin); }
use lib 'lib';
use Test::Nginx;
use Test::Nginx::Stream qw/ stream /;
###############################################################################
select STDERR; $| = 1;
select STDOUT; $| = 1;
my $t = Test::Nginx->new()->has(qw/stream stream_return/)
->write_file_expand('nginx.conf', <<'EOF');
%%TEST_GLOBALS%%
daemon off;
events {
}
stream {
%%TEST_GLOBALS_STREAM%%
js_import test.js;
js_set $test test.random_values_test;
server {
listen 127.0.0.1:8081;
return $test;
}
}
EOF
$t->write_file('test.js', <<EOF);
function count1(v) {
return v.toString(2).match(/1/g).length;
}
/*
* Statistic test
* bits1 is a random variable with Binomial distribution
* Expected value is N / 2
* Standard deviation is sqrt(N / 4)
*/
function random_values_test(s) {
let buf = new Uint32Array(32);
crypto.getRandomValues(buf);
let bits1 = buf.reduce((a, v)=> a + count1(v), 0);
let nbits = buf.length * 32;
let mean = nbits / 2;
let stdd = Math.sqrt(nbits / 4);
return bits1 > (mean - 10 * stdd) && bits1 < (mean + 10 * stdd);
}
export default {random_values_test};
EOF
$t->try_run('no stream js_var')->plan(1);
###############################################################################
is(stream('127.0.0.1:' . port(8081))->io('###'), 'true', 'random values test');
###############################################################################
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