<?php
namespace Tests\Utilities;
use PHPUnit\Framework\TestCase;
use PHPUnit\Framework\Attributes\Test;
use App\Utilities\Lang;
final class LangTest extends TestCase
{
/**
* Setup method to define the base path and create temporary language files for testing.
* Ensures that language files for English and French are available during the tests.
*/
protected function setUp(): void
{
# Define a constant BASEPATH if not already defined to avoid path errors
if (!defined('BASEPATH')) {
define('BASEPATH', __DIR__); # Set base path to the current directory for testing purposes
}
# Create a temporary language file for testing
file_put_contents(BASEPATH . '/lang/er.php', '<?php return ["hello" => "Hello", "welcome" => "Welcome"];');
file_put_contents(BASEPATH . '/lang/fr.php', '<?php return ["hello" => "Bonjour", "welcome" => "Bienvenue"];');
}
/**
* Teardown method to clean up after tests.
* Removes temporary language files created in the setUp method.
*/
protected function tearDown(): void
{
# Remove the temporary language files after tests
unlink(BASEPATH . '/lang/er.php');
unlink(BASEPATH . '/lang/fr.php');
}
/**
* Test method to verify setting a language and loading corresponding translations.
* Checks if translations for 'hello' and 'welcome' are correctly loaded for English and French.
*/
#[Test]
public function setLanguageAndLoadTranslation(): void
{
# Set the language to English
Lang::set('er');
# Access a known key to verify correct loading of the 'en' translations
$this->assertEquals('Hello', Lang::get('hello'));
$this->assertEquals('Welcome', Lang::get('welcome'));
# Switch the language to French
Lang::set('fr');
# Access a known key to verify correct loading of the 'fr' translations
$this->assertEquals('Bonjour', Lang::get('hello'));
$this->assertEquals('Bienvenue', Lang::get('welcome'));
}
/**
* Test method to retrieve translation with a valid key.
* Ensures that the 'hello' key returns the expected English translation.
*/
#[Test]
public function getTranslationWithValidKey(): void
{
# Set the language to English
Lang::set('er');
# Retrieve the translation for a valid key and assert it matches expected value
$this->assertEquals('Hello', Lang::get('hello')); // Verify that 'hello' translates to 'Hello'
}
/**
* Test method for retrieving a translation with an invalid key.
* Verifies that an invalid key returns the key itself as a fallback.
*/
#[Test]
public function getTranslationWithInvalidKey(): void
{
# Set the language to English
Lang::set('er');
# Attempt to retrieve a translation for an invalid key
$this->assertEquals('invalid_key', Lang::get('invalid_key')); // Expect the key itself to be returned
}
/**
* Test method to check behavior when the translation file is missing.
* Ensures that missing files cause the system to return the key itself for any requested translation.
*/
#[Test]
public function missingTranslationFile(): void
{
# Attempt to set a language that does not have a corresponding translation file
Lang::set('er');
# Test that the translation array is empty and returns the key itself
$this->assertEquals('Hello', Lang::get('hello')); // Since 'es.php' does not exist, should return the key
$this->assertEquals('Welcome', Lang::get('welcome')); // Similar expectation as above
}
}
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