--- /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 Traversable it is applied to contains
+ * only values of a given type.
+ *
+ * @since Class available since Release 3.1.4
+ */
+class PHPUnit_Framework_Constraint_TraversableContainsOnly extends PHPUnit_Framework_Constraint
+{
+ /**
+ * @var PHPUnit_Framework_Constraint
+ */
+ protected $constraint;
+
+ /**
+ * @var string
+ */
+ protected $type;
+
+ /**
+ * @param string $type
+ * @param bool $isNativeType
+ */
+ public function __construct($type, $isNativeType = true)
+ {
+ parent::__construct();
+
+ if ($isNativeType) {
+ $this->constraint = new PHPUnit_Framework_Constraint_IsType($type);
+ } else {
+ $this->constraint = new PHPUnit_Framework_Constraint_IsInstanceOf(
+ $type
+ );
+ }
+
+ $this->type = $type;
+ }
+
+ /**
+ * Evaluates the constraint for parameter $other
+ *
+ * If $returnResult is set to false (the default), an exception is thrown
+ * in case of a failure. null is returned otherwise.
+ *
+ * If $returnResult is true, the result of the evaluation is returned as
+ * a boolean value instead: true in case of success, false in case of a
+ * failure.
+ *
+ * @param mixed $other Value or object to evaluate.
+ * @param string $description Additional information about the test
+ * @param bool $returnResult Whether to return a result or throw an exception
+ *
+ * @return mixed
+ *
+ * @throws PHPUnit_Framework_ExpectationFailedException
+ */
+ public function evaluate($other, $description = '', $returnResult = false)
+ {
+ $success = true;
+
+ foreach ($other as $item) {
+ if (!$this->constraint->evaluate($item, '', true)) {
+ $success = false;
+ break;
+ }
+ }
+
+ if ($returnResult) {
+ return $success;
+ }
+
+ if (!$success) {
+ $this->fail($other, $description);
+ }
+ }
+
+ /**
+ * Returns a string representation of the constraint.
+ *
+ * @return string
+ */
+ public function toString()
+ {
+ return 'contains only values of type "' . $this->type . '"';
+ }
+}