PHPUnit9.0 斷言-assertNan()

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

PHPUnit9.0 斷言集合

當 ?$variable? 不是 ?NAN ?時報告錯誤，錯誤訊息由 ?$message? 指定。
示例 1.50 assertNan() 的用法

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

final class NanTest extends TestCase
{
    public function testFailure(): void
    {
        $this->assertNan(1);
    }
}

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

F

Time: 0 seconds, Memory: 5.00Mb

There was 1 failure:

1) NanTest::testFailure
Failed asserting that 1 is nan.

/home/sb/NanTest.php:6

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