Adds nested Higher Order Expectations.

src/Concerns/Extendable.php

@@ -4,8 +4,8 @@ declare(strict_types=1);
 
 namespace Pest\Concerns;
 
+use BadMethodCallException;
 use Closure;
-use Pest\HigherOrderExpectation;
 
 /**
  * @internal
@@ -43,7 +43,7 @@ trait Extendable
     public function __call(string $method, array $parameters)
     {
         if (!static::hasExtend($method)) {
-            return new HigherOrderExpectation($this, $method, $parameters);
+            throw new BadMethodCallException("$method is not a callable method name.");
         }
 
         /** @var Closure $extend */

src/Concerns/RetrievesValues.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Concerns;
+
+/**
+ * @internal
+ */
+trait RetrievesValues
+{
+    /**
+     * Safely retrieve the value at the given key from an object or array.
+     *
+     * @param array<mixed>|object $value
+     * @param mixed               $default
+     *
+     * @return mixed
+     */
+    private function retrieve(string $key, $value, $default = null)
+    {
+        if (is_array($value)) {
+            return $value[$key] ?? $default;
+        }
+
+        // @phpstan-ignore-next-line
+        return $value->$key ?? $default;
+    }
+}