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

<?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.