--- /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.
+ */
+
+/**
+ * Logical NOT.
+ *
+ * @since Class available since Release 3.0.0
+ */
+class PHPUnit_Framework_Constraint_Not extends PHPUnit_Framework_Constraint
+{
+ /**
+ * @var PHPUnit_Framework_Constraint
+ */
+ protected $constraint;
+
+ /**
+ * @param PHPUnit_Framework_Constraint $constraint
+ */
+ public function __construct($constraint)
+ {
+ parent::__construct();
+
+ if (!($constraint instanceof PHPUnit_Framework_Constraint)) {
+ $constraint = new PHPUnit_Framework_Constraint_IsEqual($constraint);
+ }
+
+ $this->constraint = $constraint;
+ }
+
+ /**
+ * @param string $string
+ *
+ * @return string
+ */
+ public static function negate($string)
+ {
+ return str_replace(
+ array(
+ 'contains ',
+ 'exists',
+ 'has ',
+ 'is ',
+ 'are ',
+ 'matches ',
+ 'starts with ',
+ 'ends with ',
+ 'reference ',
+ 'not not '
+ ),
+ array(
+ 'does not contain ',
+ 'does not exist',
+ 'does not have ',
+ 'is not ',
+ 'are not ',
+ 'does not match ',
+ 'starts not with ',
+ 'ends not with ',
+ 'don\'t reference ',
+ 'not '
+ ),
+ $string
+ );
+ }
+
+ /**
+ * 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)
+ {
+ $success = !$this->constraint->evaluate($other, $description, true);
+
+ if ($returnResult) {
+ return $success;
+ }
+
+ if (!$success) {
+ $this->fail($other, $description);
+ }
+ }
+
+ /**
+ * 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)
+ {
+ switch (get_class($this->constraint)) {
+ case 'PHPUnit_Framework_Constraint_And':
+ case 'PHPUnit_Framework_Constraint_Not':
+ case 'PHPUnit_Framework_Constraint_Or':
+ return 'not( ' . $this->constraint->failureDescription($other) . ' )';
+
+ default:
+ return self::negate(
+ $this->constraint->failureDescription($other)
+ );
+ }
+ }
+
+ /**
+ * Returns a string representation of the constraint.
+ *
+ * @return string
+ */
+ public function toString()
+ {
+ switch (get_class($this->constraint)) {
+ case 'PHPUnit_Framework_Constraint_And':
+ case 'PHPUnit_Framework_Constraint_Not':
+ case 'PHPUnit_Framework_Constraint_Or':
+ return 'not( ' . $this->constraint->toString() . ' )';
+
+ default:
+ return self::negate(
+ $this->constraint->toString()
+ );
+ }
+ }
+
+ /**
+ * Counts the number of constraint elements.
+ *
+ * @return int
+ *
+ * @since Method available since Release 3.4.0
+ */
+ public function count()
+ {
+ return count($this->constraint);
+ }
+}