# assertSame() >[info] ## assertSame(mixed $expected, mixed $actual[, string $message = '']) 当两个变量 `$expected` 和 `$actual` 的值与类型不完全相同时报告错误，错误讯息由 `$message` 指定。 `assertNotSame()` 是与之相反的断言，接受相同的参数。 `assertAttributeSame()` 和 `assertAttributeNotSame()` 是便捷包装(convenience wrapper)，以某个类或对象的某个 `public`、`protected` 或 `private` 属性作为实际值来进行比较。 **Example A.37. assertSame() 的用法** ~~~ <?php class SameTest extends PHPUnit_Framework_TestCase { public function testFailure() { $this->assertSame('2204', 2204); } } ?> ~~~ ~~~ phpunit SameTest PHPUnit 5.0.0 by Sebastian Bergmann and contributors. F Time: 0 seconds, Memory: 5.00Mb There was 1 failure: 1) SameTest::testFailure Failed asserting that 2204 is identical to '2204'. /home/sb/SameTest.php:6 FAILURES! Tests: 1, Assertions: 1, Failures: 1. ~~~ >[info] ## assertSame(object $expected, object $actual[, string $message = '']) 当两个变量 `$expected` 和 `$actual` 不是指向同一个对象的引用时报告错误，错误讯息由 `$message` 指定。 **Example A.38. assertSame() 应用于对象时的用法** ~~~ <?php class SameTest extends PHPUnit_Framework_TestCase { public function testFailure() { $this->assertSame(new stdClass, new stdClass); } } ?> ~~~ ~~~ phpunit SameTest PHPUnit 5.0.0 by Sebastian Bergmann and contributors. F Time: 0 seconds, Memory: 4.75Mb There was 1 failure: 1) SameTest::testFailure Failed asserting that two variables reference the same object. /home/sb/SameTest.php:6 FAILURES! Tests: 1, Assertions: 1, Failures: 1. ~~~