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diff --git a/vendor/phpunit/phpunit/src/Framework/Constraint/FileExists.php b/vendor/phpunit/phpunit/src/Framework/Constraint/FileExists.php
new file mode 100644
index 000000000..25643bd21
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+++ b/vendor/phpunit/phpunit/src/Framework/Constraint/FileExists.php
@@ -0,0 +1,60 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Constraint that checks if the file(name) that it is evaluated for exists.
+ *
+ * The file path to check is passed as $other in evaluate().
+ *
+ * @since Class available since Release 3.0.0
+ */
+class PHPUnit_Framework_Constraint_FileExists extends PHPUnit_Framework_Constraint
+{
+    /**
+     * Evaluates the constraint for parameter $other. Returns true if the
+     * constraint is met, false otherwise.
+     *
+     * @param mixed $other Value or object to evaluate.
+     *
+     * @return bool
+     */
+    protected function matches($other)
+    {
+        return file_exists($other);
+    }
+
+    /**
+     * Returns the description of the failure
+     *
+     * The beginning of failure messages is "Failed asserting that" in most
+     * cases. This method should return the second part of that sentence.
+     *
+     * @param mixed $other Evaluated value or object.
+     *
+     * @return string
+     */
+    protected function failureDescription($other)
+    {
+        return sprintf(
+            'file "%s" exists',
+            $other
+        );
+    }
+
+    /**
+     * Returns a string representation of the constraint.
+     *
+     * @return string
+     */
+    public function toString()
+    {
+        return 'file exists';
+    }
+}