Add hasStartMaximizedEnabled method. (#978)

* Add hasStartMaximizedEnabled method.

* Fix formatting.

* Update DuskTestCase.stub

Co-authored-by: Taylor Otwell <[email protected]>

Author: roksprogar

stubs/DuskTestCase.stub

@@ -32,7 +32,7 @@ abstract class DuskTestCase extends BaseTestCase
     protected function driver()
     {
         $options = (new ChromeOptions)->addArguments(collect([
-            '--window-size=1920,1080',
+            $this->shouldStartMaximized() ? '--start-maximized' : '--window-size=1920,1080',
         ])->unless($this->hasHeadlessDisabled(), function ($items) {
             return $items->merge([
                 '--disable-gpu',
@@ -58,4 +58,15 @@ abstract class DuskTestCase extends BaseTestCase
         return isset($_SERVER['DUSK_HEADLESS_DISABLED']) ||
                isset($_ENV['DUSK_HEADLESS_DISABLED']);
     }
+
+    /**
+     * Determine if the browser window should start maximized.
+     *
+     * @return bool
+     */
+    protected function shouldStartMaximized()
+    {
+        return isset($_SERVER['DUSK_START_MAXIMIZED']) ||
+               isset($_ENV['DUSK_START_MAXIMIZED']);
+    }
 }