MDL-48302 behat: Reset all data, before starting behat suite
[moodle.git] / lib / tests / behat / behat_hooks.php
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f5ceb6c2 1<?php
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2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
16
17/**
18 * Behat hooks steps definitions.
19 *
20 * This methods are used by Behat CLI command.
21 *
22 * @package core
23 * @category test
24 * @copyright 2012 David Monllaó
25 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
26 */
27
28// NOTE: no MOODLE_INTERNAL test here, this file may be required by behat before including /config.php.
29
30require_once(__DIR__ . '/../../behat/behat_base.php');
31
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32use Behat\Behat\Event\SuiteEvent as SuiteEvent,
33 Behat\Behat\Event\ScenarioEvent as ScenarioEvent,
34 Behat\Behat\Event\StepEvent as StepEvent,
89cf999a 35 Behat\Mink\Exception\DriverException as DriverException,
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36 WebDriver\Exception\NoSuchWindow as NoSuchWindow,
37 WebDriver\Exception\UnexpectedAlertOpen as UnexpectedAlertOpen,
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38 WebDriver\Exception\UnknownError as UnknownError,
39 WebDriver\Exception\CurlExec as CurlExec,
870349ee 40 WebDriver\Exception\NoAlertOpenError as NoAlertOpenError;
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41
42/**
43 * Hooks to the behat process.
44 *
45 * Behat accepts hooks after and before each
46 * suite, feature, scenario and step.
47 *
48 * They can not call other steps as part of their process
49 * like regular steps definitions does.
50 *
51 * Throws generic Exception because they are captured by Behat.
52 *
53 * @package core
54 * @category test
55 * @copyright 2012 David Monllaó
56 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
57 */
58class behat_hooks extends behat_base {
59
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60 /**
61 * @var Last browser session start time.
62 */
63 protected static $lastbrowsersessionstart = 0;
64
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65 /**
66 * @var For actions that should only run once.
67 */
68 protected static $initprocessesfinished = false;
69
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70 /**
71 * Some exceptions can only be caught in a before or after step hook,
72 * they can not be thrown there as they will provoke a framework level
73 * failure, but we can store them here to fail the step in i_look_for_exceptions()
74 * which result will be parsed by the framework as the last step result.
75 *
76 * @var Null or the exception last step throw in the before or after hook.
77 */
78 protected static $currentstepexception = null;
79
5c0dfe32 80 /**
a964ead0 81 * If we are saving any kind of dump on failure we should use the same parent dir during a run.
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82 *
83 * @var The parent dir name
84 */
a964ead0 85 protected static $faildumpdirname = false;
5c0dfe32 86
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87 /**
88 * Gives access to moodle codebase, ensures all is ready and sets up the test lock.
89 *
90 * Includes config.php to use moodle codebase with $CFG->behat_*
91 * instead of $CFG->prefix and $CFG->dataroot, called once per suite.
92 *
93 * @static
94 * @throws Exception
95 * @BeforeSuite
96 */
97 public static function before_suite($event) {
98 global $CFG;
99
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100 // Defined only when the behat CLI command is running, the moodle init setup process will
101 // read this value and switch to $CFG->behat_dataroot and $CFG->behat_prefix instead of
102 // the normal site.
103 define('BEHAT_TEST', 1);
104
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105 define('CLI_SCRIPT', 1);
106
cfcbc34a 107 // With BEHAT_TEST we will be using $CFG->behat_* instead of $CFG->dataroot, $CFG->prefix and $CFG->wwwroot.
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108 require_once(__DIR__ . '/../../../config.php');
109
110 // Now that we are MOODLE_INTERNAL.
111 require_once(__DIR__ . '/../../behat/classes/behat_command.php');
17344d4c 112 require_once(__DIR__ . '/../../behat/classes/behat_selectors.php');
af4830a2 113 require_once(__DIR__ . '/../../behat/classes/behat_context_helper.php');
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114 require_once(__DIR__ . '/../../behat/classes/util.php');
115 require_once(__DIR__ . '/../../testing/classes/test_lock.php');
b08b0a28 116 require_once(__DIR__ . '/../../testing/classes/nasty_strings.php');
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117
118 // Avoids vendor/bin/behat to be executed directly without test environment enabled
119 // to prevent undesired db & dataroot modifications, this is also checked
120 // before each scenario (accidental user deletes) in the BeforeScenario hook.
121
122 if (!behat_util::is_test_mode_enabled()) {
123 throw new Exception('Behat only can run if test mode is enabled. More info in ' . behat_command::DOCS_URL . '#Running_tests');
124 }
125
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126 // Reset all data, before checking for is_server_running.
127 // If not done, then it can return apache error, while running tests.
128 behat_util::reset_all_data();
129
f5ceb6c2 130 if (!behat_util::is_server_running()) {
3b7d3fb8 131 throw new Exception($CFG->behat_wwwroot .
60129d5d 132 ' is not available, ensure you specified correct url and that the server is set up and started.' .
3b7d3fb8 133 ' More info in ' . behat_command::DOCS_URL . '#Running_tests');
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134 }
135
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136 // Prevents using outdated data, upgrade script would start and tests would fail.
137 if (!behat_util::is_test_data_updated()) {
b32ca4ca 138 $commandpath = 'php admin/tool/behat/cli/init.php';
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139 throw new Exception("Your behat test site is outdated, please run\n\n " .
140 $commandpath . "\n\nfrom your moodle dirroot to drop and install the behat test site again.");
b831d479 141 }
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142 // Avoid parallel tests execution, it continues when the previous lock is released.
143 test_lock::acquire('behat');
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144
145 // Store the browser reset time if reset after N seconds is specified in config.php.
146 if (!empty($CFG->behat_restart_browser_after)) {
147 // Store the initial browser session opening.
148 self::$lastbrowsersessionstart = time();
149 }
5c0dfe32 150
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151 if (!empty($CFG->behat_faildump_path) && !is_writable($CFG->behat_faildump_path)) {
152 throw new Exception('You set $CFG->behat_faildump_path to a non-writable directory');
5c0dfe32 153 }
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154 }
155
156 /**
157 * Resets the test environment.
158 *
159 * @throws coding_exception If here we are not using the test database it should be because of a coding error
160 * @BeforeScenario
161 */
162 public function before_scenario($event) {
163 global $DB, $SESSION, $CFG;
164
165 // As many checks as we can.
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166 if (!defined('BEHAT_TEST') ||
167 !defined('BEHAT_SITE_RUNNING') ||
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168 php_sapi_name() != 'cli' ||
169 !behat_util::is_test_mode_enabled() ||
cfcbc34a 170 !behat_util::is_test_site()) {
46ac40cd 171 throw new coding_exception('Behat only can modify the test database and the test dataroot!');
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172 }
173
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174 $moreinfo = 'More info in ' . behat_command::DOCS_URL . '#Running_tests';
175 $driverexceptionmsg = 'Selenium server is not running, you need to start it to run tests that involve Javascript. ' . $moreinfo;
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176 try {
177 $session = $this->getSession();
178 } catch (CurlExec $e) {
179 // Exception thrown by WebDriver, so only @javascript tests will be caugth; in
180 // behat_util::is_server_running() we already checked that the server is running.
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181 throw new Exception($driverexceptionmsg);
182 } catch (DriverException $e) {
183 throw new Exception($driverexceptionmsg);
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184 } catch (UnknownError $e) {
185 // Generic 'I have no idea' Selenium error. Custom exception to provide more feedback about possible solutions.
186 $this->throw_unknown_exception($e);
187 }
188
189
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190 // We need the Mink session to do it and we do it only before the first scenario.
191 if (self::is_first_scenario()) {
f59f6b6b 192 behat_selectors::register_moodle_selectors($session);
af4830a2 193 behat_context_helper::set_session($session);
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194 }
195
de230fd3 196 // Reset $SESSION.
2e00d01d 197 \core\session\manager::init_empty_session();
c8619f33 198
ef1d45b3 199 behat_util::reset_all_data();
b08b0a28 200
de230fd3 201 // Assign valid data to admin user (some generator-related code needs a valid user).
f5ceb6c2 202 $user = $DB->get_record('user', array('username' => 'admin'));
d79d5ac2 203 \core\session\manager::set_user($user);
5f4b4e91 204
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205 // Reset the browser if specified in config.php.
206 if (!empty($CFG->behat_restart_browser_after) && $this->running_javascript()) {
207 $now = time();
208 if (self::$lastbrowsersessionstart + $CFG->behat_restart_browser_after < $now) {
f59f6b6b 209 $session->restart();
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210 self::$lastbrowsersessionstart = $now;
211 }
212 }
213
5f4b4e91 214 // Start always in the the homepage.
3b7d3fb8 215 try {
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216 // Let's be conservative as we never know when new upstream issues will affect us.
217 $session->visit($this->locate_path('/'));
3b7d3fb8 218 } catch (UnknownError $e) {
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219 $this->throw_unknown_exception($e);
220 }
870349ee 221
f59f6b6b 222
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223 // Checking that the root path is a Moodle test site.
224 if (self::is_first_scenario()) {
225 $notestsiteexception = new Exception('The base URL (' . $CFG->wwwroot . ') is not a behat test site, ' .
3b7d3fb8 226 'ensure you started the built-in web server in the correct directory or your web server is correctly started and set up');
19f6703d 227 $this->find("xpath", "//head/child::title[normalize-space(.)='" . behat_util::BEHATSITENAME . "']", $notestsiteexception);
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228
229 self::$initprocessesfinished = true;
230 }
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231 // Run all test with medium (1024x768) screen size, to avoid responsive problems.
232 $this->resize_window('medium');
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233 }
234
f5ceb6c2 235 /**
d1e55a47 236 * Wait for JS to complete before beginning interacting with the DOM.
f5ceb6c2 237 *
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238 * Executed only when running against a real browser. We wrap it
239 * all in a try & catch to forward the exception to i_look_for_exceptions
240 * so the exception will be at scenario level, which causes a failure, by
241 * default would be at framework level, which will stop the execution of
242 * the run.
f5ceb6c2 243 *
6e2c417c 244 * @BeforeStep @javascript
f5ceb6c2 245 */
6e2c417c 246 public function before_step_javascript($event) {
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247
248 try {
249 $this->wait_for_pending_js();
250 self::$currentstepexception = null;
251 } catch (Exception $e) {
252 self::$currentstepexception = $e;
253 }
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254 }
255
256 /**
257 * Wait for JS to complete after finishing the step.
258 *
259 * With this we ensure that there are not AJAX calls
260 * still in progress.
261 *
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262 * Executed only when running against a real browser. We wrap it
263 * all in a try & catch to forward the exception to i_look_for_exceptions
264 * so the exception will be at scenario level, which causes a failure, by
265 * default would be at framework level, which will stop the execution of
266 * the run.
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267 *
268 * @AfterStep @javascript
269 */
270 public function after_step_javascript($event) {
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271 global $CFG;
272
273 // Save a screenshot if the step failed.
a964ead0 274 if (!empty($CFG->behat_faildump_path) &&
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275 $event->getResult() === StepEvent::FAILED) {
276 $this->take_screenshot($event);
277 }
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278
279 try {
280 $this->wait_for_pending_js();
281 self::$currentstepexception = null;
282 } catch (UnexpectedAlertOpen $e) {
283 self::$currentstepexception = $e;
284
285 // Accepting the alert so the framework can continue properly running
286 // the following scenarios. Some browsers already closes the alert, so
287 // wrapping in a try & catch.
288 try {
289 $this->getSession()->getDriver()->getWebDriverSession()->accept_alert();
290 } catch (Exception $e) {
291 // Catching the generic one as we never know how drivers reacts here.
292 }
293 } catch (Exception $e) {
294 self::$currentstepexception = $e;
295 }
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296 }
297
3ec07614 298 /**
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299 * Execute any steps required after the step has finished.
300 *
301 * This includes creating an HTML dump of the content if there was a failure.
302 *
303 * @AfterStep
304 */
305 public function after_step($event) {
306 global $CFG;
307
308 // Save the page content if the step failed.
309 if (!empty($CFG->behat_faildump_path) &&
310 $event->getResult() === StepEvent::FAILED) {
311 $this->take_contentdump($event);
312 }
313 }
314
315 /**
316 * Getter for self::$faildumpdirname
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317 *
318 * @return string
319 */
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320 protected function get_run_faildump_dir() {
321 return self::$faildumpdirname;
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322 }
323
324 /**
325 * Take screenshot when a step fails.
3ec07614 326 *
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327 * @throws Exception
328 * @param StepEvent $event
3ec07614 329 */
5c0dfe32 330 protected function take_screenshot(StepEvent $event) {
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331 // Goutte can't save screenshots.
332 if (!$this->running_javascript()) {
333 return false;
3ec07614 334 }
5c0dfe32 335
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336 list ($dir, $filename) = $this->get_faildump_filename($event, 'png');
337 $this->saveScreenshot($filename, $dir);
338 }
339
340 /**
341 * Take a dump of the page content when a step fails.
342 *
343 * @throws Exception
344 * @param StepEvent $event
345 */
346 protected function take_contentdump(StepEvent $event) {
347 list ($dir, $filename) = $this->get_faildump_filename($event, 'html');
348
349 $fh = fopen($dir . DIRECTORY_SEPARATOR . $filename, 'w');
350 fwrite($fh, $this->getSession()->getPage()->getContent());
351 fclose($fh);
352 }
353
354 /**
355 * Determine the full pathname to store a failure-related dump.
356 *
357 * This is used for content such as the DOM, and screenshots.
358 *
359 * @param StepEvent $event
167486b3 360 * @param String $filetype The file suffix to use. Limited to 4 chars.
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361 */
362 protected function get_faildump_filename(StepEvent $event, $filetype) {
363 global $CFG;
364
365 // All the contentdumps should be in the same parent dir.
366 if (!$faildumpdir = self::get_run_faildump_dir()) {
367 $faildumpdir = self::$faildumpdirname = date('Ymd_His');
5c0dfe32 368
a964ead0 369 $dir = $CFG->behat_faildump_path . DIRECTORY_SEPARATOR . $faildumpdir;
5c0dfe32 370
a964ead0 371 if (!is_dir($dir) && !mkdir($dir, $CFG->directorypermissions, true)) {
5c0dfe32 372 // It shouldn't, we already checked that the directory is writable.
a964ead0 373 throw new Exception('No directories can be created inside $CFG->behat_faildump_path, check the directory permissions.');
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374 }
375 } else {
376 // We will always need to know the full path.
a964ead0 377 $dir = $CFG->behat_faildump_path . DIRECTORY_SEPARATOR . $faildumpdir;
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378 }
379
380 // The scenario title + the failed step text.
a964ead0 381 // We want a i-am-the-scenario-title_i-am-the-failed-step.$filetype format.
5c0dfe32 382 $filename = $event->getStep()->getParent()->getTitle() . '_' . $event->getStep()->getText();
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383 $filename = preg_replace('/([^a-zA-Z0-9\_]+)/', '-', $filename);
384
a2c271dd 385 // File name limited to 255 characters. Leaving 4 chars for the file
167486b3 386 // extension as we allow .png for images and .html for DOM contents.
a2c271dd 387 $filename = substr($filename, 0, 250) . '.' . $filetype;
5c0dfe32 388
a964ead0 389 return array($dir, $filename);
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390 }
391
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392 /**
393 * Waits for all the JS to be loaded.
394 *
afe9f42a 395 * @throws \Exception
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396 * @throws NoSuchWindow
397 * @throws UnknownError
398 * @return bool True or false depending whether all the JS is loaded or not.
399 */
400 protected function wait_for_pending_js() {
401
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402 // We don't use behat_base::spin() here as we don't want to end up with an exception
403 // if the page & JSs don't finish loading properly.
404 for ($i = 0; $i < self::EXTENDED_TIMEOUT * 10; $i++) {
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405 $pending = '';
406 try {
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407 $jscode = 'return ' . self::PAGE_READY_JS . ' ? "" : M.util.pending_js.join(":");';
408 $pending = $this->getSession()->evaluateScript($jscode);
6e2c417c 409 } catch (NoSuchWindow $nsw) {
d1e55a47 410 // We catch an exception here, in case we just closed the window we were interacting with.
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411 // No javascript is running if there is no window right?
412 $pending = '';
d1e55a47 413 } catch (UnknownError $e) {
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414 // M is not defined when the window or the frame don't exist anymore.
415 if (strstr($e->getMessage(), 'M is not defined') != false) {
416 $pending = '';
417 }
28abad1a 418 }
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419
420 // If there are no pending JS we stop waiting.
6e2c417c 421 if ($pending === '') {
d1e55a47 422 return true;
6e2c417c 423 }
d1e55a47 424
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425 // 0.1 seconds.
426 usleep(100000);
1303eb29 427 }
d1e55a47 428
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429 // Timeout waiting for JS to complete. It will be catched and forwarded to behat_hooks::i_look_for_exceptions().
430 // It is unlikely that Javascript code of a page or an AJAX request needs more than self::EXTENDED_TIMEOUT seconds
431 // to be loaded, although when pages contains Javascript errors M.util.js_complete() can not be executed, so the
432 // number of JS pending code and JS completed code will not match and we will reach this point.
433 throw new \Exception('Javascript code and/or AJAX requests are not ready after ' . self::EXTENDED_TIMEOUT .
434 ' seconds. There is a Javascript error or the code is extremely slow.');
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435 }
436
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437 /**
438 * Internal step definition to find exceptions, debugging() messages and PHP debug messages.
439 *
440 * Part of behat_hooks class as is part of the testing framework, is auto-executed
441 * after each step so no features will splicitly use it.
442 *
443 * @Given /^I look for exceptions$/
f49cede7 444 * @throw Exception Unknown type, depending on what we caught in the hook or basic \Exception.
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445 * @see Moodle\BehatExtension\Tester\MoodleStepTester
446 */
447 public function i_look_for_exceptions() {
448
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449 // If the step already failed in a hook throw the exception.
450 if (!is_null(self::$currentstepexception)) {
451 throw self::$currentstepexception;
452 }
453
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454 // Wrap in try in case we were interacting with a closed window.
455 try {
5f4b4e91 456
217e8e59 457 // Exceptions.
3e76c7fa 458 $exceptionsxpath = "//div[@data-rel='fatalerror']";
8aea365f 459 // Debugging messages.
3e76c7fa 460 $debuggingxpath = "//div[@data-rel='debugging']";
8aea365f 461 // PHP debug messages.
3e76c7fa 462 $phperrorxpath = "//div[@data-rel='phpdebugmessage']";
8aea365f 463 // Any other backtrace.
6cd21356 464 $othersxpath = "(//*[contains(., ': call to ')])[1]";
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465
466 $xpaths = array($exceptionsxpath, $debuggingxpath, $phperrorxpath, $othersxpath);
467 $joinedxpath = implode(' | ', $xpaths);
468
469 // Joined xpath expression. Most of the time there will be no exceptions, so this pre-check
470 // is faster than to send the 4 xpath queries for each step.
471 if (!$this->getSession()->getDriver()->find($joinedxpath)) {
472 return;
473 }
474
475 // Exceptions.
476 if ($errormsg = $this->getSession()->getPage()->find('xpath', $exceptionsxpath)) {
5f4b4e91 477
217e8e59 478 // Getting the debugging info and the backtrace.
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479 $errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.alert-error');
480 // If errorinfoboxes is empty, try find notifytiny (original) class.
481 if (empty($errorinfoboxes)) {
482 $errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.notifytiny');
483 }
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484 $errorinfo = $this->get_debug_text($errorinfoboxes[0]->getHtml()) . "\n" .
485 $this->get_debug_text($errorinfoboxes[1]->getHtml());
5f4b4e91 486
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487 $msg = "Moodle exception: " . $errormsg->getText() . "\n" . $errorinfo;
488 throw new \Exception(html_entity_decode($msg));
489 }
490
491 // Debugging messages.
8aea365f 492 if ($debuggingmessages = $this->getSession()->getPage()->findAll('xpath', $debuggingxpath)) {
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493 $msgs = array();
494 foreach ($debuggingmessages as $debuggingmessage) {
495 $msgs[] = $this->get_debug_text($debuggingmessage->getHtml());
496 }
497 $msg = "debugging() message/s found:\n" . implode("\n", $msgs);
498 throw new \Exception(html_entity_decode($msg));
5f4b4e91 499 }
90ed22ab 500
217e8e59 501 // PHP debug messages.
8aea365f 502 if ($phpmessages = $this->getSession()->getPage()->findAll('xpath', $phperrorxpath)) {
90ed22ab 503
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504 $msgs = array();
505 foreach ($phpmessages as $phpmessage) {
506 $msgs[] = $this->get_debug_text($phpmessage->getHtml());
507 }
508 $msg = "PHP debug message/s found:\n" . implode("\n", $msgs);
509 throw new \Exception(html_entity_decode($msg));
90ed22ab 510 }
bbd802f7 511
217e8e59 512 // Any other backtrace.
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513 // First looking through xpath as it is faster than get and parse the whole page contents,
514 // we get the contents and look for matches once we found something to suspect that there is a backtrace.
8aea365f 515 if ($this->getSession()->getDriver()->find($othersxpath)) {
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516 $backtracespattern = '/(line [0-9]* of [^:]*: call to [\->&;:a-zA-Z_\x7f-\xff][\->&;:a-zA-Z0-9_\x7f-\xff]*)/';
517 if (preg_match_all($backtracespattern, $this->getSession()->getPage()->getContent(), $backtraces)) {
518 $msgs = array();
519 foreach ($backtraces[0] as $backtrace) {
520 $msgs[] = $backtrace . '()';
521 }
522 $msg = "Other backtraces found:\n" . implode("\n", $msgs);
523 throw new \Exception(htmlentities($msg));
217e8e59 524 }
bbd802f7 525 }
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526
527 } catch (NoSuchWindow $e) {
528 // If we were interacting with a popup window it will not exists after closing it.
bbd802f7 529 }
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530 }
531
532 /**
533 * Converts HTML tags to line breaks to display the info in CLI
534 *
535 * @param string $html
536 * @return string
537 */
538 protected function get_debug_text($html) {
539
540 // Replacing HTML tags for new lines and keeping only the text.
541 $notags = preg_replace('/<+\s*\/*\s*([A-Z][A-Z0-9]*)\b[^>]*\/*\s*>*/i', "\n", $html);
542 return preg_replace("/(\n)+/s", "\n", $notags);
543 }
544
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545 /**
546 * Returns whether the first scenario of the suite is running
547 *
548 * @return bool
549 */
550 protected static function is_first_scenario() {
551 return !(self::$initprocessesfinished);
552 }
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553
554 /**
555 * Throws an exception after appending an extra info text.
556 *
557 * @throws Exception
558 * @param UnknownError $exception
559 * @return void
560 */
561 protected function throw_unknown_exception(UnknownError $exception) {
562 $text = get_string('unknownexceptioninfo', 'tool_behat');
563 throw new Exception($text . PHP_EOL . $exception->getMessage());
564 }
565
f5ceb6c2 566}
a964ead0 567