assertNull()

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

當(dāng) $actual 不是 NULL 時(shí)報(bào)告錯(cuò)誤，錯(cuò)誤訊息由 $message 指定。

assertNotNull() 是與之相反的斷言，接受相同的參數(shù)。

Example?A.32.?assertNull() 的使用

<?php
class NullTest extends PHPUnit_Framework_TestCase
{
    public function testFailure()
    {
        $this->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.