assertNull()

assertNull(mixed $variable[, string $message = ''])

当 $actual 不是 NULL 时报告错误，错误讯息由 $message 指定。

assertNotNull() 是与之相反的断言，接受相同的参数。

Example A.32. assertNull() 的使用

assertNull('foo');
    }
}
?>

phpunit NotNullTest
PHPUnit 5.0.0 by Sebastian Bergmann and contributors.
F
Time: 0 seconds, Memory: 5.00Mb
There was 1 failure:
1) NullTest::testFailure
Failed asserting that 'foo' is null.
/home/sb/NotNullTest.php:6
FAILURES!
Tests: 1, Assertions: 1, Failures: 1.