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Files in adriansuter/php-autoload-override
Package php-autoload-override
Short Description Override global scoped fully qualified function calls inside your class methods in order to be able to mock them during testing.
License MIT
Homepage https://adriansuter.github.io/php-autoload-override/
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Informations about the package php-autoload-override
PHP-Autoload-Override
This library allows overriding fully qualified function calls inside your class methods in order to be able to mock them during testing.
NOTE: The library can be used for other scenarios as well. But we recommend using it for testing purposes only.
Requirements
- PHP 8.2 or later
- Composer with PSR-4 (PSR-0 is not supported)
Installation
Usage with PHPUnit
Say we want to unit test the following class Probability.
The class has one method pick that takes a probability (between 0 and 100) and two color names as arguments.
The method would then use the rand function of the global scope to generate a random number and
if the generated number is smaller equal to the given probability, then the method would return
the first color, otherwise the method would return the second color.
The problem
As we cannot control the output of the rand function (it is in global scope), we cannot unit test
that method. Well, until now. Using the PHP-Autoload-Override library, it is possible to
override the rand function and therefore control its generated random number.
The solution
After installing the PHP-Autoload-Override library, we would open the bootstrap script of our test suite (see also PHPUnit Configuration). There we will write the following code
Now the class Probability would be loaded into the PHPUnit runtime such that all function calls to the global scoped
rand() function in the class Probability get overridden by the closure given above.
Our test class can now be written as follows.
The test case testPick would call the pick method two times. As we have overridden the \rand function, we can
control its returned value to be always 35. So the first call checks, if the else-block
gets executed. The second one checks, if the if-block gets executed. Hooray, 100% code coverage.
Note that this override would only be applied during the unit tests.
Learn More
License
The PHP-Autoload-Override library is licensed under the MIT license. See License File for more information.
