--- /dev/null
+<?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 asserts that the class it is evaluated for has a given
+ * attribute.
+ *
+ * The attribute name is passed in the constructor.
+ *
+ * @since Class available since Release 3.1.0
+ */
+class PHPUnit_Framework_Constraint_ClassHasAttribute extends PHPUnit_Framework_Constraint
+{
+ /**
+ * @var string
+ */
+ protected $attributeName;
+
+ /**
+ * @param string $attributeName
+ */
+ public function __construct($attributeName)
+ {
+ parent::__construct();
+ $this->attributeName = $attributeName;
+ }
+
+ /**
+ * 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)
+ {
+ $class = new ReflectionClass($other);
+
+ return $class->hasProperty($this->attributeName);
+ }
+
+ /**
+ * Returns a string representation of the constraint.
+ *
+ * @return string
+ */
+ public function toString()
+ {
+ return sprintf(
+ 'has attribute "%s"',
+ $this->attributeName
+ );
+ }
+
+ /**
+ * 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(
+ '%sclass "%s" %s',
+ is_object($other) ? 'object of ' : '',
+ is_object($other) ? get_class($other) : $other,
+ $this->toString()
+ );
+ }
+}