PHPUnit9.0 断言-assertInstanceOf()

assertInstanceOf($expected, $actual[, $message = ''])

PHPUnit9.0 断言集合

当 ​$actual​ 不是 ​$expected​ 的实例时报告错误，错误讯息由 ​$message​ 指定。
​assertNotInstanceOf()​ 是与之相反的断言，接受相同的参数。
示例 1.31 assertInstanceOf() 的用法

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class InstanceOfTest extends TestCase
{
    public function testFailure(): void
    {
        $this->assertInstanceOf(RuntimeException::class, new Exception);
    }
}

$ phpunit InstanceOfTest
PHPUnit latest.0 by Sebastian Bergmann and contributors.

F

Time: 0 seconds, Memory: 5.00Mb

There was 1 failure:

1) InstanceOfTest::testFailure
Failed asserting that Exception Object (...) is an instance of class "RuntimeException".

/home/sb/InstanceOfTest.php:6

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.