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

vendor/phpspec/prophecy/spec/Prophecy/Argument/Token/StringContainsTokenSpec.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace spec\Prophecy\Argument\Token;
+
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
+
+class StringContainsTokenSpec extends ObjectBehavior
+{
+    function let()
+    {
+        $this->beConstructedWith('a substring');
+    }
+
+    function it_is_initializable()
+    {
+        $this->shouldHaveType('Prophecy\Argument\Token\StringContainsToken');
+    }
+
+    function it_implements_TokenInterface()
+    {
+        $this->shouldBeAnInstanceOf('Prophecy\Argument\Token\TokenInterface');
+    }
+
+    function it_holds_value()
+    {
+        $this->getValue()->shouldReturn('a substring');
+    }
+
+    function it_is_not_last()
+    {
+        $this->shouldNotBeLast();
+    }
+
+    function it_scores_6_if_the_argument_contains_the_value()
+    {
+        $this->scoreArgument('Argument containing a substring')->shouldReturn(6);
+    }
+
+    function it_does_not_score_if_the_argument_does_not_contain_the_value()
+    {
+        $this->scoreArgument('Argument will not match')->shouldReturn(false);
+    }
+
+    function its_string_representation_shows_substring()
+    {
+        $this->__toString()->shouldReturn('contains("a substring")');
+    }
+}