feat(pending-higher-order-tests): adds code and tests

tests/Features/PendingHigherOrderTests.php

@@ -0,0 +1,29 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+
+uses(Gettable::class);
+
+/**
+ * @return TestCase|Gettable
+ */
+function get(string $route)
+{
+    return test()->get($route);
+}
+
+trait Gettable
+{
+    /**
+     * @return TestCase|Gettable
+     */
+    public function get(string $route)
+    {
+        assertNotEmpty($route);
+
+        return $this;
+    }
+}
+
+get('foo')->get('bar')->assertTrue(true);
+get('foo')->assertTrue(true);