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php - MockBuilder 在接口中看不到方法

问题描述

我正在尝试模拟 Throwable 接口，但 MockBuilder 没有看到 getPrevious() 方法。

    $throwableMock = $this->getMockBuilder(\Throwable::class)
        ->disableOriginalConstructor()
        ->getMock();

    $throwableMock->method('getPrevious')
        ->willReturn($domainExceptionMock);

我收到此错误：

Trying to configure method "getPrevious" which cannot be configured because it does not exist, has not been specified, is final, or is static

如果我将 addMethods 添加到模拟生成器，如下所示：

$throwableMock = $this->getMockBuilder(\Throwable::class)
        ->addMethods(['getPrevious'])
        ->disableOriginalConstructor()
        ->getMock();

我收到以下错误：

Trying to set mock method "getPrevious" with addMethods(), but it exists in class "Throwable". Use onlyMethods() for methods that exist in the class

我究竟做错了什么？

标签： phpmockingphpunit

解决方案

我不确定您要对模拟异常做什么，但您可能会发现构建一个真实对象更容易，然后抛出它：

class SanityTest extends TestCase
{
    public function testThrowingMock(): void
    {
        $domainExceptionMock = new \RuntimeException('hello');
        $exception = new \Exception('msg', 0, $domainExceptionMock);

        $tst = $this->createMock(Hello::class);  // class Hello {public function hello() {} }
        $tst->method('hello')
            ->willThrowException($exception);

        try {
            $tst->hello();
        } catch (\Exception $e) {
            $this->assertInstanceOf(\RuntimeException::class, $e->getPrevious());
        }
    }
}

模拟一切可能比设置和使用，和/或事后检查真实对象更困难。

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