fixed nullable values in the helper methods

Author: austintoddj

src/Canvas.php

@@ -151,21 +151,21 @@ public static function gravatar(string $email, int $size = 200, string $default
     /**
      * Return true if dark mode is enabled.
      *
-     * @param int $enabled
+     * @param int|null $enabled
      * @return bool
      */
-    public static function enabledDarkMode(int $enabled): bool
+    public static function enabledDarkMode(?int $enabled): bool
     {
         return (bool) $enabled ?: false;
     }
 
     /**
      * Return true if the app is configured to use Arabic or Farsi.
      *
-     * @param string $locale
+     * @param string|null $locale
      * @return bool
      */
-    public static function usingRightToLeftLanguage(string $locale): bool
+    public static function usingRightToLeftLanguage(?string $locale): bool
     {
         return in_array($locale, ['ar', 'fa']);
     }

tests/CanvasTest.php

@@ -67,9 +67,9 @@ public function testURLIsValid(): void
 
     public function testTrimURL(): void
     {
-        $url = Canvas::trimUrl('https://www.example.com?string-to-trim');
+        $this->assertSame(Canvas::trimUrl('https://www.example.com?string-to-trim'), 'www.example.com');
 
-        $this->assertSame($url, 'www.example.com');
+        $this->assertNull(Canvas::trimUrl(null));
     }
 
     public function testGravatar(): void
@@ -90,12 +90,14 @@ public function testEnabledDarkMode(): void
     {
         $this->assertTrue(Canvas::enabledDarkMode(1));
         $this->assertFalse(Canvas::enabledDarkMode(0));
+        $this->assertFalse(Canvas::enabledDarkMode(null));
     }
 
     public function testUsingRightToLeftLanguage(): void
     {
         $this->assertTrue(Canvas::usingRightToLeftLanguage('ar'));
         $this->assertTrue(Canvas::usingRightToLeftLanguage('fa'));
         $this->assertFalse(Canvas::usingRightToLeftLanguage('en'));
+        $this->assertFalse(Canvas::usingRightToLeftLanguage(null));
     }
 }