Testing

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WP-PHPUnit Setup with WP-CLI

Testing WP-PHPUnit Setup with WP-CLI

Minimum Requirements:

  • PHP
  • MySQL Server
  • WP CLI
  • SVN

Step 1:

Open your terminal and go to your plugin/theme’s root directory

cd wordpress/wp-content/plugins/<your-plugin>/

Run the wp scaffold command:

wp scaffold plugin-tests <plugin-name>

This should create 2 directories and 1 file

  • bin: This contains the installing file.
  • tests: Contains a bootstrap file and a sample test case file.
  • phpunit.xml.dist file: Used to configure PHPUnit & create test suites

Step 2:

Run bin/install-wp-tests.sh

You need to provide the following arguments for it to run:

There is some issue when using zsh shell with the LocalWP, the best way is to execute the below script with the shell you are using.

For bash shell:

bash ./bin/install-wp-tests.sh <db-name> <db-user> <db-pass> [db-host] [wp-version]

For zsh shell:

zsh ./bin/install-wp-tests.sh <db-name> <db-user> <db-pass> [db-host] [wp-version]
<db-name> - Name of the test database you created.
<db-user> - User of the database.
<db-pass> - Password of the Database user.
[db-host] - Host of the database (Usually localhost).
[wp-version] - WordPress version to download to run the tests.

This will create a test database and create a new WordPress installation in /tmp

If your WP-CLI verison is same or higher than 2.10.0, you can directly go to the step 3.

Run the following command, to get the WP CLI version.

wp --version

Note: For Local by Flywheel, you need to edit ./install-wp-test.php to make it work with WPLocal’s DB, basically adding full –user & –password parameters to make it compatible with the WPLocal site shell.

Make the following changes

Change 1:

In recreate_db() function

Replace with 

mysqladmin drop $DB_NAME -f --user="$DB_USER" --password="$DB_PASS"$EXTRA

Change 2:

In create_db() function 

Replace with

mysqladmin create $DB_NAME --user="$DB_USER" --password="$DB_PASS"$EXTRA

Change 3:

In install_db() function

Replace with

mysql --user="$DB_USER" --password="$DB_PASS"$EXTRA --execute='show databases;' | grep ^$DB_NAMES

Step 3:

Install phpunit as project dependencies:

composer require --dev phpunit/phpunit

The latest version of the PHPUnit will be installed, which may not work properly. Go through this chart https://make.wordpress.org/core/handbook/references/phpunit-compatibility-and-wordpress-versions/, and update the PHPUnit version in the composer.json file

Step 4:

Install Yoast PHPUnit polyfills:

composer require --dev yoast/phpunit-polyfills:"^3.0"

Step 5:

Comment out the excluded test from the phpunit.xml.dist file.

<?xml version="1.0"?>
<phpunit
	bootstrap="tests/bootstrap.php"
	backupGlobals="false"
	colors="true"
	convertErrorsToExceptions="true"
	convertNoticesToExceptions="true"
	convertWarningsToExceptions="true"
	>
	<php>
		<env name="WP_TESTS_PHPUNIT_POLYFILLS_PATH" value="vendor/yoast/phpunit-polyfills" />
	</php>
	<testsuites>
		<testsuite name="testing">
			<directory prefix="test-" suffix=".php">./tests/</directory>
			<!-- <exclude>./tests/test-sample.php</exclude> -->
		</testsuite>
	</testsuites>
</phpunit>

Step 6:

Run in plugin root:

./vendor/bin/phpunit 

Output:

References:

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