add method to calculate active variant before rendering

[jalopez]

Table of Contents

• Description
• Motivation and Context
• How Has This Been Tested?
• Screenshots (if appropriate):
• Types of changes
• Checklist:

Description

This PR adds a new method in the emitter calculateActiveVariant that will force the calculation of the active variant of an experiment, even if it has not been rendered yet. It has implied some refactoring (take the activeVariant calculation outside the Experiment component, so it can be called from both the component and the emitter)

Motivation and Context

There are some scenarios where developer needs to know beforehand which will the variant of an experiment will be selected (before rendering it). There are some event trackers that need to receive the experiments and the selected variant just when the page loads, and before the experiment itself is rendered. To do so, there is a new method calculateActiveVariant inside the emitter that can be called at anytime and will set an active variant of the given experiment even if the associated component is not yet rendered.

How Has This Been Tested?

• Add new unit tests to the emitter component.
• Other tests keep passing

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [X] My code follows the code style of this project.
• [X] My change requires a change to the documentation.
• [X] I have updated the documentation accordingly.
• [X] I have added tests to cover my changes.
• [X] All new and existing tests passed.

[chestozo]

hey guys! any chances to get this PR merged in the close future? would be happy to give you a hand if needed )

[moretti]

Hey @jalopez, thank you for your PR! I'm sorry that I took so long to get back to you, I think it was lost in the noise generated by Github notifications.

[moretti]

Released in v2.3.0 🎉

[chestozo]

great!!!