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What about a multiple return value?

Let's say we have a step:

Given there is a user "Fred" in organization "Fred's Org"

Which is the return value? The user or the organization? What if I want to save both, one in "USER" and one in "ORG"?

How to make the step return 2 values?
How to differentiate between them in the storage step?

Allow only scalars in storage

A step's return value can be anything, but if it's saved in storage, it must be a scalar, because it will be used as string.

Step: [And] expect the following "1" steps to fail

Use extension to register service:

Behat\Testwork\Call\ServiceContainer\CallExtension:
  call.result_filter:
    - Behat\Testwork\Call\Filter\ResultFilter
    - Behat\Testwork\Call\CallCenter::filterResult()

Implementation:

interface ResultFilter {
    /**
     * Checks if filter supports call result.
     *
     * @param CallResult $result
     *
     * @return Boolean
     */
    public function supportsResult(CallResult $result);

    /**
     * Filters call result and returns a new result.
     *
     * @param CallResult $result
     *
     * @return CallResult
     */
    public function filterResult(CallResult $result);
}

Caller:


/**
 * Filters call result using registered filters and returns a filtered one.
 *
 * @param CallResult $result
 *
 * @return CallResult
 */
private function filterResult(CallResult $result) {
    foreach ($this->resultFilters as $filter) {
        if (!$filter->supportsResult($result)) {
            continue;
        }

        return $filter->filterResult($result);
    }

    return $result;
}

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