The PHPUnit Bridge

The PHPUnit Bridge

The PHPUnit Bridge provides utilities to report legacy tests and usage of deprecated code.

It comes with the following features:

  • Forces the tests to use a consistent locale (C);
  • Auto-register class_exists to load Doctrine annotations (when used);
  • It displays the whole list of deprecated features used in the application;
  • Displays the stack trace of a deprecation on-demand;

New in version 2.7: The PHPUnit Bridge was introduced in Symfony 2.7. It is however possible to install the bridge in any Symfony application (even 2.3).

Installation

You can install the component in 2 different ways:

Then, require the vendor/autoload.php file to enable the autoloading mechanism provided by Composer. Otherwise, your application won't be able to find the classes of this Symfony component.

Usage

Once the component is installed, a simple-phpunit script is created in the vendor/ directory to run tests. This script wraps the original PHPUnit binary to provide more features:

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$ cd my-project/
$ ./vendor/bin/simple-phpunit

After running your PHPUnit tests, you will get a report similar to this one:

../_images/report.png

The summary includes:

Unsilenced
Reports deprecation notices that were triggered without the recommended @-silencing operator.
Legacy
Deprecation notices denote tests that explicitly test some legacy features.
Remaining/Other
Deprecation notices are all other (non-legacy) notices, grouped by message, test class and method.

Note

If you don't want to use the simple-phpunit script, register the following PHPUnit event listener in your PHPUnit configuration file to get the same report about deprecations (which is created by a PHP error handler called DeprecationErrorHandler):

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<!-- phpunit.xml.dist -->
<!-- ... -->
<listeners>
    <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />
</listeners>

Trigger Deprecation Notices

Deprecation notices can be triggered by using:

@trigger_error('Your deprecation message', E_USER_DEPRECATED);

Without the @-silencing operator, users would need to opt-out from deprecation notices. Silencing by default swaps this behavior and allows users to opt-in when they are ready to cope with them (by adding a custom error handler like the one provided by this bridge). When not silenced, deprecation notices will appear in the Unsilenced section of the deprecation report.

Mark Tests as Legacy

There are four ways to mark a test as legacy:

  • (Recommended) Add the @group legacy annotation to its class or method;
  • Make its class name start with the Legacy prefix;
  • Make its method name start with testLegacy*() instead of test*();
  • Make its data provider start with provideLegacy*() or getLegacy*().

Configuration

In case you need to inspect the stack trace of a particular deprecation triggered by your unit tests, you can set the SYMFONY_DEPRECATIONS_HELPER environment variable to a regular expression that matches this deprecation's message, enclosed with /. For example, with:

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<!-- http://phpunit.de/manual/4.1/en/appendixes.configuration.html -->
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
>

    <!-- ... -->

    <php>
        <server name="KERNEL_DIR" value="app/" />
        <env name="SYMFONY_DEPRECATIONS_HELPER" value="/foobar/" />
    </php>
</phpunit>

PHPUnit will stop your test suite once a deprecation notice is triggered whose message contains the "foobar" string.

Making Tests Fail

By default, any non-legacy-tagged or any non-@-silenced deprecation notices will make tests fail. Alternatively, setting SYMFONY_DEPRECATIONS_HELPER to an arbitrary value (ex: 320) will make the tests fails only if a higher number of deprecation notices is reached (0 is the default value). You can also set the value "weak" which will make the bridge ignore any deprecation notices. This is useful to projects that must use deprecated interfaces for backward compatibility reasons.


This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.