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phpunit方法的参数断言returnArgument

发布时间：2021-09-22 12:57:32编辑：雪饮阅读（）

有时候需要对一个方法的传入参数进行断言，即便原始方法可能是无参的，这里不管，这里只管断言你传入的参数。

一个实例如：

DatabaseTest.php：

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

final class DatabaseTest extends TestCase
{
    public function testReturnArgumentStub(): void
    {
        // 为 SomeClass 类创建桩件。
        $stub = $this->createStub(Database::class);

        // 配置桩件。
        $stub->method('doSomething')
            ->will($this->returnArgument(0));

        // $stub->doSomething('foo') 返回 'foo'
        $this->assertSame('foo', $stub->doSomething('foo'));

        // $stub->doSomething('bar') 返回 'bar'
        $this->assertSame('bar', $stub->doSomething('bar'));
    }
}

这里doSomething原方法的确是无参的，但是这里也可以用测试替身来实现貌似原方法有参一样。

执行结果是没有什么问题的

C:\Users\Administrator\PhpstormProjects\untitled\organizing>D:\phpstudy_pro\Extensions\php\php7.3.4nts\php.exe D:\phpstudy_pro\Extensions\php\php7.3.4nts\phpunit-9.5.8.phar C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\DatabaseTest.php

PHPUnit 9.5.8 by Sebastian Bergmann and contributors.

. 1 / 1 (100%)

Time: 00:00.005, Memory: 20.00 MB

OK (1 test, 2 assertions)

但是这里如果你将returnArgument中的索引换成如换成1就不行了：

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

final class DatabaseTest extends TestCase
{
    public function testReturnArgumentStub(): void
    {
        // 为 SomeClass 类创建桩件。
        $stub = $this->createStub(Database::class);

        // 配置桩件。
        $stub->method('doSomething')
            ->will($this->returnArgument(1));

        // $stub->doSomething('foo') 返回 'foo'
        $this->assertSame('foo', $stub->doSomething('foo'));

        // $stub->doSomething('bar') 返回 'bar'
        $this->assertSame('bar', $stub->doSomething('bar'));
    }
}

PHPUnit 9.5.8 by Sebastian Bergmann and contributors.

F 1 / 1 (100%)

Time: 00:00.006, Memory: 20.00 MB

There was 1 failure:

1) DatabaseTest::testReturnArgumentStub

Warning: include(PHPUnit\Composer\Autoload\ClassLoader.php): failed to open stream: No such file or directory in C:\Users\Administrator\PhpstormProjects\untitled\organizing\src\autoload.php on line 3

Call Stack:

0.0142 1571792 1. {main}() D:\phpstudy_pro\Extensions\php\php7.3.4nts\phpunit-9.5.8.phar:0

0.1334 18893800 2. PHPUnit\TextUI\Command::main(???) D:\phpstudy_pro\Extensions\php\php7.3.4nts\phpunit-9.5.8.phar:2249

0.1334 18893912 3. PHPUnit\TextUI\Command->run(array(2), true) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/Command.php:93

0.1382 19069184 4. PHPUnit\TextUI\TestRunner->run(class PHPUnit\Framework\TestSuite, array(15), array(0), true) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/Command.php:124

0.1752 19123392 5. PHPUnit\TextUI\DefaultResultPrinter->printResult(class PHPUnit\Framework\TestResult) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/TestRunner.php:496

0.1754 19123416 6. PHPUnit\TextUI\DefaultResultPrinter->printFailures(class PHPUnit\Framework\TestResult) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/DefaultResultPrinter.php:154

0.1754 19123416 7. PHPUnit\TextUI\DefaultResultPrinter->printDefects(array(1), string(7)) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/DefaultResultPrinter.php:299

0.1758 19123416 8. PHPUnit\TextUI\DefaultResultPrinter->printDefect(class PHPUnit\Framework\TestFailure, long) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/DefaultResultPrinter.php:272

0.1762 19123416 9. PHPUnit\TextUI\DefaultResultPrinter->printDefectTrace(class PHPUnit\Framework\TestFailure) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/DefaultResultPrinter.php:279

0.1762 19123416 10. PHPUnit\Framework\ExpectationFailedException->__toString() phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/TextUI/DefaultResultPrinter.php:288

0.1762 19123496 11. PHPUnit\Util\Filter::getFilteredStacktrace(class PHPUnit\Framework\ExpectationFailedException) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Framework/Exception/Exception.php:58

0.1762 19124632 12. PHPUnit\Util\Filter::shouldPrintFrame(array(2), string(25), class PHPUnit\Util\ExcludeList) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/Filter.php:57

0.1763 19124792 13. PHPUnit\Util\Filter::fileIsExcluded(string(112), class PHPUnit\Util\ExcludeList) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/Filter.php:76

0.1763 19124792 14. PHPUnit\Util\ExcludeList->isExcluded(string(112)) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/Filter.php:80

0.1763 19124792 15. PHPUnit\Util\ExcludeList->initialize() phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/ExcludeList.php:166

0.1763 19124792 16. class_exists(string(37)) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/ExcludeList.php:182

0.1763 19124856 17. spl_autoload_call(string(37)) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/ExcludeList.php:182

0.1763 19124920 18. autoload(string(37)) phar://D:/phpstudy_pro/Extensions/php/php7.3.4nts/phpunit-9.5.8.phar/phpunit/Util/ExcludeList.php:182

Warning: include(): Failed opening 'PHPUnit\Composer\Autoload\ClassLoader.php' for inclusion (include_path='.;C:\php\pear') in C:\Users\Administrator\PhpstormProjects\untitled\organizing\src\autoload.php on line 3