PHPUnit9.0 斷言-assertIsCallable()

assertIsCallable($actual[, $message = ''])

PHPUnit9.0 斷言集合

當(dāng) ?$actual? 的類型不是 ?callable ?時(shí)報(bào)告錯(cuò)誤，錯(cuò)誤訊息由 ?$message? 指定。
?assertIsNotCallable()? 是與之相反的斷言，接受相同的參數(shù)。
示例 1.34 assertIsCallable() 的用法

<?php
use PHPUnit\Framework\TestCase;

class CallableTest extends TestCase
{
    public function testFailure()
    {
        $this->assertIsCallable(null);
    }
}

$ phpunit CallableTest
PHPUnit |version|.0 by Sebastian Bergmann and contributors.

F

Time: 0 seconds, Memory: 5.00Mb

There was 1 failure:

1) CallableTest::testFailure
Failed asserting that null is of type "callable".

/home/sb/CallableTest.php:8

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