PhpUnitAssertException

AssertException is a trait, so it can be easily used in your test case., _(*1)

For PHP 7.1 and PHPUnit 6 compatibility require version 1.3.
For PHP 7.1 compatibility require version 1.2.
For PHP 7 compatibility require version 1.1.
For PHP 5 compatibility require version 1.0.

Install

$ composer require vladahejda/phpunit-assert-exception

Usage

<?php

class MyTest extends \PHPUnit\Framework\TestCase
{
    use VladaHejda\AssertException;

    public function testMultipleExceptionsAtOnce()
    {
        $test = function () {
            // here comes some test stuff of your unit (tested class)
            // which you expect that will throw an Exception
            throw new InvalidArgumentException('Some message 12345', 100);
        };

        // just test if function throws an Exception
        $this->assertException($test); // pass

        // test class of an Exception
        $this->assertException($test, InvalidArgumentException::class); // pass

        // test Exception code
        $this->assertException($test, null, 100); // pass

        // test Exception message
        $this->assertException($test, null, null, 'Some message 12345'); // pass
        $this->assertException($test, null, null, 'Some message'); // also pass, because it checks on substring level

        // test all
        $this->assertException($test, InvalidArgumentException::class, 100, 'Some message 12345'); // pass

        // and here some failing tests
        // wrong class
        $this->assertException($test, ErrorException::class); // fail
        // wrong code
        $this->assertException($test, InvalidArgumentException::class, 200); // fail
        // wrong message
        $this->assertException($test, InvalidArgumentException::class, 100, 'Bad message'); // fail
    }
}

Also see an assertError and assertThrowable methods, which tests if PHP internal Error was thrown, or any Throwable respectively., _(*2)