refactor: Remove TogglesHeadlessMode redundant methods

laravel/dusk#1098

Laravel Dusk 8.x now defines these methods in class
Laravel\Dusk\TestCase so the stub classes that extend
TestCase don't need to redefine hasHeadlessDisabled()
and shouldStartMaximized().

src/Concerns/TogglesHeadlessMode.php

@@ -19,26 +19,4 @@ protected function filterHeadlessArguments(array $args = [])
             ]);
         })->values()->all();
     }
-
-    /**
-     * Determine whether the Dusk command has disabled headless mode.
-     *
-     * @return bool
-     */
-    protected function hasHeadlessDisabled()
-    {
-        return isset($_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']);
-    }
 }

tests/Stubs/TogglesHeadlessStub.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Derekmd\Dusk\Tests\Stubs;
+
+use Derekmd\Dusk\Concerns\TogglesHeadlessMode;
+use Laravel\Dusk\TestCase;
+
+class TogglesHeadlessStub extends TestCase
+{
+    use TogglesHeadlessMode {
+        filterHeadlessArguments as filterHeadlessArgumentsProtected;
+    }
+
+    public function __construct()
+    {
+        parent::__construct('TogglesHeadless');
+    }
+
+    public function filterHeadlessArguments($args)
+    {
+        return $this->filterHeadlessArgumentsProtected($args);
+    }
+}

tests/TogglesHeadlessModeTest.php

@@ -2,14 +2,12 @@
 
 namespace Derekmd\Dusk\Tests;
 
-use Derekmd\Dusk\Concerns\TogglesHeadlessMode;
+use Derekmd\Dusk\Tests\Stubs\TogglesHeadlessStub;
 use PHPUnit\Framework\TestCase;
 
 class TogglesHeadlessModeTest extends TestCase
 {
-    use TogglesHeadlessMode;
-
-    protected function tearDown() : void
+    protected function tearDown(): void
     {
         unset($_ENV['DUSK_HEADLESS_DISABLED']);
 
@@ -20,7 +18,7 @@ public function test_building_arguments_with_headless_mode()
     {
         unset($_ENV['DUSK_HEADLESS_DISABLED']);
 
-        $args = $this->filterHeadlessArguments([
+        $args = (new TogglesHeadlessStub)->filterHeadlessArguments([
             '--disable-gpu',
             '--headless',
             '--window-size=1920,1080',
@@ -37,7 +35,7 @@ public function test_building_arguments_when_headless_mode_is_disabled()
     {
         $_ENV['DUSK_HEADLESS_DISABLED'] = true;
 
-        $args = $this->filterHeadlessArguments([
+        $args = (new TogglesHeadlessStub)->filterHeadlessArguments([
             '--disable-gpu',
             '--headless',
             '--window-size=1920,1080',