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Automated web acceptance testing with
Behat
Rajesh Taneja@TanejaRajiMoodleMoot Australia 2015
#mootau15
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Who am I ?
Rajesh Taneja● @TanejaRaji, at Moodle HQ● Test Automation Developer● Moodler for last 4 years ● Aussie from the land of Bollywood
What is Behat ?
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● Behat tests the behavior of moodle, described in special language called Gherkin
What is Behat ?
the world’s open source learning platform
● Behat tests the behavior of moodle, described in special language called Gherkin
● Gherkin is a “Business Readable Domain Specific Language” created especially for behavior descriptions.
What is Behat ?
the world’s open source learning platform
● Behat tests the behavior of moodle, described in special language called Gherkin
● Gherkin is a “Business Readable Domain Specific Language” created especially for behavior descriptions.
Example?
Feature: DescriptionIn order to do ...As a [role] I need to do ...
Scenario:Given [initial context], When [event occurs], Then [ensure some outcomes]
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Why Behat ?
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To Run existing tests.
● Set config values for behat
● Installation
● Start Selenium server
● Running behat test
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Set config values
● $CFG->behat_prefix = 'b_';
● $CFG->behat_dataroot = '/path/to/your/behat/dataroot/directory';
● $CFG->behat_wwwroot = 'http://127.0.0.1/moodle';
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Initialise behat setup
● Single Behat run○ php admin/tool/behat/cli/init.php
● Parallel Behat run○ php admin/tool/behat/cli/init.php --parallel=4
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Start selenium server
● Download selenium server○ http://seleniumhq.org/download/
● Start selenium server○ java -jar /full/to/path/selenium-server.jar
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Run behat test
● Single run○ vendor/bin/behat --config
/path/to/behat_dataroot/behat/behat.yml○ php admin/tool/behat/cli/run.php
● Parallel run○ php admin/tool/behat/cli/run.php
DEMO
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Write new feature1. Create feature file under:
COMPONENTNAME/tests/behat/featurename.feature
2. Add a tag with the component
name in Frankenstyle format
3. Begin writing the user story of the feature
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Available steps in moodle
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Adding new stepsCreate new context COMPONENTNAME/tests/behat/context.feature
require_once(__DIR__ . '/../../../lib/behat/behat_base.php');use Behat\Behat\Context\Step\Given as Given;use Behat\Behat\Context\Step\When as When;
class behat_auth extends behat_base {
/** * Logs in the user. There should exist a user with the same value as username and password. * * @Given /^I log in as "(?P<username_string>(?:[^"]|\\")*)"$/ */ public function i_log_in_as($username) { }}
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Checklist● New step should be implemented as public method● Classname should be same as filename + .php● Save file in COMPONENTNAME/tests/behat/ directory or
lib/tests/behat/● Describe step in single line in phpdoc● Provide proper regular expression input
○ Number: "(?P<info_about_what_you_expect_number>\d+)" ○ Text: "(?P<info_about_what_you_expect_string>(?:[^"]|\\")*)"○ Key/value pair: Finish your regular expression with :○ Selector: "(?P<selector_string>[^"]*)" or "(?P<text_selector_string>
[^"]*)"
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Running specific feature
● php admin/tool/behat/cli/run.php --tags=@mod_assign
● php admin/tool/behat/cli/run.php FULL/PATH/TO/tests/behat/featurename.feature
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Running behat with specific browser● Set config in config.php
● Reinitialize behat ○ php admin/tool/behat/cli/util.php --enable
● Start selenium server with required driver○ java -jar path/to/selenium-server.jar -Dwebdriver.chrome.
driver=/path/to/chromedriver● Run behat
○ php admin/tool/behat/cli/run.php
$CFG->behat_config = array( 'chrome' => array( 'extensions' => array( 'Behat\MinkExtension\Extension' => array( 'selenium2' => array( 'browser' => 'chrome',
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Reference links○ https://docs.moodle.org/dev/Acceptance_testing
○ http://docs.behat.org/
○ http://www.seleniumhq.org/
Thank you
Community: moodle.orgCommercial: moodle.com
@moodle
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