# assertStringEqualsFile() >[info] ## assertStringEqualsFile(string $expectedFile, string $actualString[, string $message = '']) 当 `$expectedFile` 所指定的文件其内容不是 `$actualString` 时报告错误，错误讯息由 `$message` 指定。 `assertStringNotEqualsFile()` 是与之相反的断言，接受相同的参数。 **Example A.40. assertStringEqualsFile() 的用法** ~~~ <?php class StringEqualsFileTest extends PHPUnit_Framework_TestCase { public function testFailure() { $this->assertStringEqualsFile('/home/sb/expected', 'actual'); } } ?> ~~~ ~~~ phpunit StringEqualsFileTest PHPUnit 5.0.0 by Sebastian Bergmann and contributors. F Time: 0 seconds, Memory: 5.25Mb There was 1 failure: 1) StringEqualsFileTest::testFailure Failed asserting that two strings are equal. --- Expected +++ Actual @@ @@ -'expected -' +'actual' /home/sb/StringEqualsFileTest.php:6 FAILURES! Tests: 1, Assertions: 2, Failures: 1. ~~~