Fix & Complete tests

tests/Feature/Http/Middlewares/SetLanguageMiddlewareTest.php

@@ -0,0 +1,155 @@
+<?php
+
+namespace Tests\Feature\Http\Middlewares;
+
+use App\Http\Middleware\SetLanguage;
+use App\Models\User;
+use Illuminate\Support\Facades\App;
+use Illuminate\Support\Facades\Config;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\TestCase;
+
+#[CoversClass(SetLanguage::class)]
+class SetLanguageMiddlewareTest extends TestCase
+{
+    const IS_FR = 'fr';
+
+    const IS_FR_WITH_VARIANT = 'fr-CA';
+
+    const IS_DE = 'de';
+
+    const UNSUPPORTED_LANGUAGE = 'yy';
+
+    const UNSUPPORTED_LANGUAGES = 'yy, ww';
+
+    const ACCEPTED_LANGUAGES_DE_FR = 'de, fr';
+
+    const ACCEPTED_LANGUAGES_UNSUPPORTED_DE = 'yy, de';
+
+    const ACCEPTED_LANGUAGES_WEIGHTED_DE_FR = 'fr;q=0.4, de;q=0.7';
+
+    const ACCEPTED_LANGUAGES_WEIGHTED_FR_VARIANTS = 'fr;q=0.4, fr-CA;q=0.7, de;q=0.5';
+
+    const ACCEPTED_LANGUAGES_WEIGHTED_ALL_DE_FR = 'fr;q=0.4, de;q=0.7, *;q=0.9';
+
+    /**
+     * @var \App\Models\User|\Illuminate\Contracts\Auth\Authenticatable
+     */
+    protected $user;
+
+    #[Test]
+    public function test_it_applies_fallback_locale()
+    {
+        Config::set('app.fallback_locale', self::IS_FR);
+
+        $this->json('GET', '/', [], ['Accept-Language' => null]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_fallback_locale_if_header_ask_for_unsupported()
+    {
+        Config::set('app.fallback_locale', self::IS_FR);
+
+        $this->json('GET', '/', [], ['Accept-Language' => self::UNSUPPORTED_LANGUAGE]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_fallback_locale_if_header_ask_for_several_unsupported()
+    {
+        Config::set('app.fallback_locale', self::IS_FR);
+
+        $this->json('GET', '/', [], ['Accept-Language' => self::UNSUPPORTED_LANGUAGES]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+    
+    #[Test]
+    public function test_it_applies_fallback_locale_if_header_ask_for_wildcard()
+    {
+        Config::set('app.fallback_locale', self::IS_FR);
+
+        $this->json('GET', '/', [], ['Accept-Language' => '*']);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_accepted_language_from_header()
+    {
+        $this->json('GET', '/', [], ['Accept-Language' => self::IS_FR]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_first_accepted_language_from_header()
+    {
+        $this->json('GET', '/', [], ['Accept-Language' => self::ACCEPTED_LANGUAGES_DE_FR]);
+
+        $this->assertEquals('de', App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_heaviest_language_from_header()
+    {
+        $this->json('GET', '/', [], ['Accept-Language' => self::ACCEPTED_LANGUAGES_WEIGHTED_DE_FR]);
+
+        $this->assertEquals('de', App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_applies_heaviest_language_with_variant_from_header()
+    {
+        $this->json('GET', '/', [], ['Accept-Language' => self::ACCEPTED_LANGUAGES_WEIGHTED_FR_VARIANTS]);
+
+        $this->assertEquals('fr', App::getLocale());
+    }
+
+    #[Test]
+    public function test_it_ignores_unsupported_language_from_header()
+    {
+        $this->json('GET', '/', [], ['Accept-Language' => self::ACCEPTED_LANGUAGES_UNSUPPORTED_DE]);
+
+        $this->assertEquals('de', App::getLocale());
+    }
+
+    #[Test]
+    public function test_user_preference_overrides_header()
+    {
+        $this->user = new User;
+        $this->user['preferences->lang'] = self::IS_FR;
+        
+        $this->actingAs($this->user)->json('GET', '/', [], ['Accept-Language' => self::IS_DE]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+
+    #[Test]
+    public function test_user_preference_applies_header()
+    {
+        $this->user = new User;
+        $this->user['preferences->lang'] = 'browser';
+        
+        $this->actingAs($this->user)->json('GET', '/', [], ['Accept-Language' => self::IS_DE]);
+
+        $this->assertEquals(self::IS_DE, App::getLocale());
+    }
+
+    #[Test]
+    public function test_user_preference_overrides_fallback()
+    {
+        Config::set('app.fallback_locale', self::IS_DE);
+
+        $this->user = new User;
+        $this->user['preferences->lang'] = self::IS_FR;
+        
+        $this->actingAs($this->user)->json('GET', '/', [], ['Accept-Language' => null]);
+
+        $this->assertEquals(self::IS_FR, App::getLocale());
+    }
+}