# assertJsonStringEqualsJsonFile() >[info] ## assertJsonStringEqualsJsonFile(mixed $expectedFile, mixed $actualJson[, string $message = '']) 当 `$actualJson` 对应的值与 `$expectedFile` 对应的值不匹配时报告错误，错误讯息由 `$message` 指定。 **Example A.27. assertJsonStringEqualsJsonFile() 的用法** ~~~ <?php class JsonStringEqualsJsonFileTest extends PHPUnit_Framework_TestCase { public function testFailure() { $this->assertJsonStringEqualsJsonFile( 'path/to/fixture/file', json_encode(array("Mascott" => "ux")) ); } } ?> ~~~ ~~~ phpunit JsonStringEqualsJsonFileTest PHPUnit 5.0.0 by Sebastian Bergmann and contributors. F Time: 0 seconds, Memory: 5.00Mb There was 1 failure: 1) JsonStringEqualsJsonFile::testFailure Failed asserting that '{"Mascott":"ux"}' matches JSON string "{"Mascott":"Tux"}". /home/sb/JsonStringEqualsJsonFileTest.php:5 FAILURES! Tests: 1, Assertions: 3, Failures: 1. ~~~