PHPUnit9.0 断言-assertCount()

assertCount($expectedCount, $haystack[, string $message = ''])

PHPUnit9.0 断言集合

当 ​$haystack​ 中的元素数量不是 ​$expectedCount​ 时报告错误，错误讯息由 ​$message​ 指定。
​assertNotCount()​ 是与之相反的断言，接受相同的参数。

示例 1.9 assertCount() 的用法

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

final class CountTest extends TestCase
{
    public function testFailure(): void
    {
        $this->assertCount(0, ['foo']);
    }
}

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

F

Time: 0 seconds, Memory: 4.75Mb

There was 1 failure:

1) CountTest::testFailure
Failed asserting that actual size 1 matches expected size 0.

/home/sb/CountTest.php:6

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