PHPUnit9.0 断言-assertContainsOnlyInstancesOf()

assertContainsOnlyInstancesOf(string $classname, Traversable|array $haystack[, string $message = ''])

PHPUnit9.0 断言集合

当 ​$haystack​ 并非仅包含类 ​$classname​ 的实例时报告错误，错误讯息由 ​$message​ 指定。
示例 1.8 assertContainsOnlyInstancesOf() 的用法

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

final class ContainsOnlyInstancesOfTest extends TestCase
{
    public function testFailure(): void
    {
        $this->assertContainsOnlyInstancesOf(
            Foo::class,
            [new Foo, new Bar, new Foo]
        );
    }
}

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

F

Time: 0 seconds, Memory: 5.00Mb

There was 1 failure:

1) ContainsOnlyInstancesOfTest::testFailure
Failed asserting that Array ([0]=> Bar Object(...)) is an instance of class "Foo".

/home/sb/ContainsOnlyInstancesOfTest.php:6

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