Resolve "Add more integration tests"

Closes #987 (closed)

app/Traits/SupportsBrowserStack.php

+<?php
+namespace App\Traits;
+
+use BrowserStack\Local;
+use Facebook\WebDriver\Remote\RemoteWebDriver;
+
+/**
+ * Run BrowserStack from your tests.
+ */
+trait SupportsBrowserStack
+{
+    protected static $bs_local;
+    /**
+     * Create the BrowserStack WebDriver instance.
+     */
+    public function createBrowserStackDriver(array $config = null): RemoteWebDriver
+    {
+        if ($config["capabilities"]["browserstack.local"] === "true") {
+            $this->bs_local = new Local();
+            $bs_local_args = [
+                "key" => $config["key"],
+            ];
+            $this->bs_local->start($bs_local_args);
+        }
+
+        return RemoteWebDriver::create(
+            "https://$config[username]:$config[key]@hub-cloud.browserstack.com/wd/hub",
+            $config["capabilities"]
+        );
+    }
+
+    /**
+     * @afterClass
+     */
+    public static function shutdown()
+    {
+        if (static::$bs_local && static::$bs_local->isRunning()) {
+            static::$bs_local->stop();
+        }
+    }
+
+}