Below is the validation language line we want to test, It’s found in resources/lang/en/validation.php and resources/lang/fr/validation.php my app supports just two languages at this time, English and French.
<?php
return [
// ...
'empty_unless' => 'The :attribute must be empty unless :other is :value.',
// ...
];
Now it’s easy to forget to define empty_unless in one of the translations files and add the proper translation. So I write tests like below so am always reminded there’s a missing translation.
<?php
namespace Tests\Unit;
use Tests\TestCase;
class ValidationLanguageLinesTest extends TestCase
{
// ...
/** @test */
public function empty_unless_has_an_english_translation()
{
self::assertTrue(
\Lang::hasForLocale('validation.empty_unless', 'en'),
'English translation for `empty_unless` not found'
);
}
/** @test */
public function empty_unless_has_a_french_translation()
{
self::assertTrue(
\Lang::hasForLocale('validation.empty_unless', 'fr'),
'French translation for `empty_unless` not found'
);
}
// ...
}
And that’s it! Should I forget to add a translation, I will be reminded by a failing unit test.
If you think this testing approach can be improved in any way, please leave a comment below, will be happy to hear it.