Symfony2 Behat 扩展上下文将导致 "Step is already defined"

Question

我正在尝试为应用程序编写一些 Behat 测试，我需要分离上下文，以便我可以在不同的其他上下文中使用一些核心元素，例如登录用户步骤。

behat.yml

suites:
    common:
        type: symfony_bundle
        bundle: CommonBundle
        mink_session: symfony2
        mink_javascript_session: selenium2
        autoload:
            'CommonContext': %paths.base%/src/xxx/CommonBundle/Features/Context
        contexts: [ xxx\CommonBundle\Features\Context\CoreContext ]

    user:
        type: symfony_bundle
        bundle: UserBundle
        mink_session: symfony2
        mink_javascript_session: selenium2
        autoload:
            'UserContext': %paths.base%/src/xxx/UserBundle/Features/Context
        contexts:
            - Behat\MinkExtension\Context\MinkContext
            - xxx\CommonBundle\Features\Context\CoreContext
            - xxx\UserBundle\Features\Context\UserContext

DefaultContext.php

namespace XXX\CommonBundle\Features\Context;

use ...

/**
 * Class DefaultContext
 */
class DefaultContext extends MinkContext implements Context, KernelAwareContext
{

    /**
     * @param AbstractEntity $oEntity
     *
     * @return object
     */
    protected function getRepository(AbstractEntity $oEntity)
    {
        return $this->getService($oEntity);
    }

    /**
     * @return mixed
     */
    protected function getEntityManager()
    {
        return $this->getService('doctrine')->getManager();
    }

    /**
     * @param $id
     *
     * @return object
     */
    protected function getService($id)
    {
        return $this->getContainer()->get($id);
    }

CoreContext.php

namespace XXX\CommonBundle\Features\Context;

use ...

/**
 * Class SubContext
 */
class CoreContext extends DefaultContext implements Context, SnippetAcceptingContext
{

    /**
     * @Given I visit the homepage
     * @When I visit the homepage
     */
    public function iVisitHomepage()
    {
        $this->visitPath('/');
    }

    /**
     * @And /^I am logged in as "([^"]*)"$/
     * @Then /^I am logged in as "([^"]*)"$/
     */
    public function iAmLoggedInAs($username)
    {
        $user = $this->getContainer()->get('fos_user.user_manager')->findUserByUsername($username);

        $this->visit('/login');

        $this->fillField('_username', $user->getEmailCanonical());
        $this->fillField('_password', self::USER_PASSWORD);

        $this->pressButton('_submit');
    }

UserContext.php

namespace xxx\UserBundle\Features\Context;

use ...

/**
 * Defines application features from the specific context.
 */
class UserContext extends CoreContext implements Context, SnippetAcceptingContext
{

    /**
     * Initializes context.
     *
     * Every scenario gets its own context instance.
     * You can also pass arbitrary arguments to the
     * context constructor through behat.yml.
     */
    public function __construct()
    {
    }

}

register_user.feature

Feature: Register user

  @javascript
  Scenario: Register user
    Given I am on homepage
    And I go to "/register/"
    And I am logged in as "foo@bar.com"
    Then I should see "Terms and Conditions"

因此，当我运行测试时，我收到一条错误消息：

Given I am on homepage
      Step "I visit the homepage" is already defined in xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()

      xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()
      xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()
    And I go to "/register/"
      Step "I visit the homepage" is already defined in xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()

      xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()
      xxx\CommonBundle\Features\Context\CoreContext::iVisitHomepage()

我的理解完全错误还是我在这里遗漏了一些设置？

Answer 1

不要扩展提供步骤定义的上下文。没有办法解决这个问题。

好的扩展提供了方便的方法但没有步骤定义的上下文。对于 Mink 扩展，MinkContext 旁边还有 RawMinkContext。首先提供步骤定义，不应扩展。另一个提供您可能感兴趣的辅助方法。RawMinkContext 是您应该扩展的方法。或者，您也可以使用 MinkAwareTrait.

Answer 2

Behat2 中的上下文以及它们现在在 Behat3 中的位置发生了变化。 Behat3 中的上下文更多地是关于 "situations" 的，您的测试可能会在其中发生。例如：

已登录
匿名访客
PublicAPI来电
已验证 API 调用
已禁用 javascript 浏览器
启用javascript浏览器

以此类推

恐怕问题出在您对两个套件中使用的 CoreContext 的配置中。您可以尝试通过运行您的套件单独避免这种情况，这样它就不会加载两种配置（并且它不会自动加载两次相同的上下文）或更改上下文策略以不使用自动加载，但有些不同，例如封装将通用步骤逻辑合并到它们自己的类中，然后从不同的上下文中使用。

希望对您有所帮助

Symfony2 Behat 扩展上下文将导致 "Step is already defined"

Symfony2 Behat Extending Contexts will result in "Step is already defined"

php

testing

symfony

behat

mink