refactor: change notation type in methods

The notation type in the test function names has been changed from camel to snake case for readability.

Closes #2

Author: josantonius

tests/LanguageCodeTest.php

@@ -1,13 +1,15 @@
 <?php
 
 /*
-* This file is part of https://github.com/josantonius/php-language-code repository.
-*
-* (c) Josantonius <hello@josantonius.dev>
-*
-* For the full copyright and license information, please view the LICENSE
-* file that was distributed with this source code.
-*/
+ * This file is part of https://github.com/josantonius/php-language-code repository.
+ *
+ * (c) Josantonius <hello@josantonius.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+ */
 
 namespace Josantonius\LanguageCode\Tests;
 
@@ -27,35 +29,35 @@ public function setUp(): void
         $this->languageCode = new LanguageCode();
     }
 
-    public function testShouldGetAllLanguageCodes(): void
+    public function test_should_get_all_language_codes(): void
     {
         $this->assertNotEmpty($this->languageCode->all());
 
         $this->assertNotEmpty($this->collection->all());
     }
 
-    public function testShouldGetLanguageCodeFromLanguageName(): void
+    public function test_should_get_language_code_from_language_name(): void
     {
         $this->assertSame('es', $this->languageCode->getCode('Spanish'));
 
         $this->assertSame('es', $this->collection->getCode('Spanish'));
     }
 
-    public function testShouldReturnNullWithUnknownLanguageName(): void
+    public function test_should_return_null_with_unknown_language_name(): void
     {
         $this->assertNull($this->languageCode->getCode('foo'));
 
         $this->assertNull($this->collection->getCode('foo'));
     }
 
-    public function testShouldGetLanguageNameFromLanguageCode(): void
+    public function test_should_get_language_name_from_language_code(): void
     {
         $this->assertSame('Spanish', $this->languageCode->getName('es'));
 
         $this->assertSame('Spanish', $this->collection->getName('es'));
     }
 
-    public function testShouldReturnNullWithUnknownLanguageCode(): void
+    public function test_should_return_null_with_unknown_language_code(): void
     {
         $this->assertNull($this->languageCode->getName('bar'));