Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/phpspec/prophecy/spec/Prophecy/Exception/Doubler/MethodNotFoundExceptionSpec.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace spec\Prophecy\Exception\Doubler;
+
+use PhpSpec\ObjectBehavior;
+use spec\Prophecy\Exception\Prophecy;
+
+class MethodNotFoundExceptionSpec extends ObjectBehavior
+{
+    function let()
+    {
+        $this->beConstructedWith('', 'User', 'getName', array(1, 2, 3));
+    }
+
+    function it_is_DoubleException()
+    {
+        $this->shouldHaveType('Prophecy\Exception\Doubler\DoubleException');
+    }
+
+    function it_has_MethodName()
+    {
+        $this->getMethodName()->shouldReturn('getName');
+    }
+
+    function it_has_classnamej()
+    {
+        $this->getClassname()->shouldReturn('User');
+    }
+
+    function it_has_an_arguments_list()
+    {
+        $this->getArguments()->shouldReturn(array(1, 2, 3));
+    }
+
+    function it_has_a_default_null_argument_list()
+    {
+        $this->beConstructedWith('', 'User', 'getName');
+        $this->getArguments()->shouldReturn(null);
+    }
+}