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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Unit tests for lib/classes/output/mustache_helper_collection
*
* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
use core\output\mustache_helper_collection;
/**
* Unit tests for the mustache_helper_collection class.
*/
class core_output_mustache_helper_collection_testcase extends advanced_testcase {
/**
* Test cases to confirm that blacklisted helpers are stripped from the source
* text by the helper before being passed to other another helper. This prevents
* nested calls to helpers.
*/
public function get_strip_blacklisted_helpers_testcases() {
return [
'no blacklist' => [
'blacklist' => [],
'input' => 'core, move, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, move, {{#js}} some nasty JS {{/js}}'
],
'blacklist no match' => [
'blacklist' => ['foo'],
'input' => 'core, move, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, move, {{#js}} some nasty JS {{/js}}'
],
'blacklist partial match 1' => [
'blacklist' => ['js'],
'input' => 'core, move, {{#json}} some nasty JS {{/json}}',
'expected' => 'core, move, {{#json}} some nasty JS {{/json}}'
],
'blacklist partial match 2' => [
'blacklist' => ['js'],
'input' => 'core, move, {{#onjs}} some nasty JS {{/onjs}}',
'expected' => 'core, move, {{#onjs}} some nasty JS {{/onjs}}'
],
'single blacklist 1' => [
'blacklist' => ['js'],
'input' => 'core, move, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, move, {{}}'
],
'single blacklist 2' => [
'blacklist' => ['js'],
'input' => 'core, move, {{ # js }} some nasty JS {{ / js }}',
'expected' => 'core, move, {{}}'
],
'single blacklist 3' => [
'blacklist' => ['js'],
'input' => 'core, {{#js}} some nasty JS {{/js}}, test',
'expected' => 'core, {{}}, test'
],
'single blacklist 3' => [
'blacklist' => ['js'],
'input' => 'core, {{#ok}} this is ok {{/ok}}, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, {{#ok}} this is ok {{/ok}}, {{}}'
],
'single blacklist multiple matches 1' => [
'blacklist' => ['js'],
'input' => 'core, {{#js}} some nasty JS {{/js}}, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, {{}}'
],
'single blacklist multiple matches 2' => [
'blacklist' => ['js'],
'input' => 'core, {{ # js }} some nasty JS {{ / js }}, {{ # js }} some nasty JS {{ / js }}',
'expected' => 'core, {{}}'
],
'single blacklist multiple matches nested 1' => [
'blacklist' => ['js'],
'input' => 'core, move, {{#js}} some nasty JS {{#js}} some nasty JS {{/js}} {{/js}}',
'expected' => 'core, move, {{}}'
],
'single blacklist multiple matches nested 2' => [
'blacklist' => ['js'],
'input' => 'core, move, {{ # js }} some nasty JS {{ # js }} some nasty JS {{ / js }}{{ / js }}',
'expected' => 'core, move, {{}}'
],
'multiple blacklist 1' => [
'blacklist' => ['js', 'foo'],
'input' => 'core, move, {{#js}} some nasty JS {{/js}}',
'expected' => 'core, move, {{}}'
],
'multiple blacklist 2' => [
'blacklist' => ['js', 'foo'],
'input' => 'core, {{#foo}} blah {{/foo}}, {{#js}} js {{/js}}',
'expected' => 'core, {{}}, {{}}'
],
'multiple blacklist 3' => [
'blacklist' => ['js', 'foo'],
'input' => '{{#foo}} blah {{/foo}}, {{#foo}} blah {{/foo}}, {{#js}} js {{/js}}',
'expected' => '{{}}, {{}}'
],
'multiple blacklist 4' => [
'blacklist' => ['js', 'foo'],
'input' => '{{#foo}} blah {{/foo}}, {{#js}} js {{/js}}, {{#foo}} blah {{/foo}}',
'expected' => '{{}}'
],
'multiple blacklist 4' => [
'blacklist' => ['js', 'foo'],
'input' => 'core, move, {{#js}} JS {{#foo}} blah {{/foo}} {{/js}}',
'expected' => 'core, move, {{}}'
],
];
}
/**
* Test that the mustache_helper_collection class correctly strips
* @dataProvider get_strip_blacklisted_helpers_testcases()
* @param string[] $blacklist The list of helpers to strip
* @param string $input The input string for the helper
* @param string $expected The expected output of the string after blacklist strip
*/
public function test_strip_blacklisted_helpers($blacklist, $input, $expected) {
$collection = new mustache_helper_collection(null, $blacklist);
$this->assertEquals($expected, $collection->strip_blacklisted_helpers($blacklist, $input));
}
/**
* Test that the blacklisted helpers are disabled during the execution of other
* helpers.
*
* Any non-blacklisted helper should still be available to call during the
* execution of a helper.
*/
public function test_blacklisted_helpers_disabled_during_execution() {
$engine = new \Mustache_Engine();
$context = new \Mustache_Context();
$lambdahelper = new \Mustache_LambdaHelper($engine, $context);
$blacklist = ['bad'];
$collection = new mustache_helper_collection(null, $blacklist);
$badcalled = false;
$goodcalled = false;
$badhelper = function() use (&$badcalled) {
$badcalled = true;
return '';
};
$goodhelper = function() use (&$goodcalled) {
$goodcalled = true;
return '';
};
// A test helper that just returns the text without modifying it.
$testhelper = function($text, $lambda) use ($collection) {
$collection->get('good')($text, $lambda);
$collection->get('bad')($text, $lambda);
return $text;
};
$collection->add('bad', $badhelper);
$collection->add('good', $goodhelper);
$collection->add('test', $testhelper);
$this->assertEquals('success output', $collection->get('test')('success output', $lambdahelper));
$this->assertTrue($goodcalled);
$this->assertFalse($badcalled);
}
}