Automate StopLight.io's Prism mock server on Travis CI and locally

[thinkingserious]

Issue Summary

In the Travis CI and local environment:

1. Download the appropriate Prism binary (if it does not exist on the system)
2. Start Prism, using SendGrid's swagger (oai) definition
3. Run the Unit Tests
4. Shut Down Prism

References

https://stoplight.io/prism
https://raw.githubusercontent.com/sendgrid/sendgrid-oai/master/oai_stoplight.json

We have already done this in these libraries:

Python:
https://github.com/sendgrid/sendgrid-python/blob/master/.travis.yml#L14
https://github.com/sendgrid/sendgrid-python/blob/master/test/prism.sh
https://github.com/sendgrid/sendgrid-python/blob/master/test/test_sendgrid.py#L22

PHP:
https://github.com/sendgrid/sendgrid-php/blob/master/.travis.yml#L3
https://github.com/sendgrid/sendgrid-php/blob/master/test/prism.sh
https://github.com/sendgrid/sendgrid-php/blob/master/test/unit/SendGridTest.php#L13

C#:
https://github.com/sendgrid/sendgrid-csharp/blob/master/.travis.yml#L9
https://github.com/sendgrid/sendgrid-csharp/tree/master/prism
https://github.com/sendgrid/sendgrid-csharp/blob/master/SendGrid/UnitTest/UnitTest.cs#L23

Go:
https://github.com/sendgrid/sendgrid-go/blob/master/.travis.yml#L4
https://github.com/sendgrid/sendgrid-go/blob/master/prism.sh
https://github.com/sendgrid/sendgrid-go/blob/master/sendgrid_test.go#L35

[tsriram]

I'd like to take this up!

[thinkingserious]

Thanks @tsriram! That's awesome!

Could you please send over a signed CLA so that we will be able to merge your changed? Thanks!

[tsriram]

@thinkingserious do I need to physically sign the CLA, scan and send it by email? Or just filling in the details & sending it by email will do?

[thinkingserious]

Hello @tsriram,

You can scan and email it. You can also use a PDF app that allows you to digitally sign or a service like www.docusign.com.

[tsriram]

@thinkingserious I'm going to be on vacation till Oct 23 and couldn't start work on this yet. Will start once I'm back if nobody is taking it up till then.

[thinkingserious]

@tsriram,

Congrats on the vacation, see you when you get back. Enjoy!

[thinkingserious]

Hi @tsriram,

How are things going? Is there anything I can do to help?

[tsriram]

@thinkingserious sorry for responding late. Have been caught up with a lot of work after vacation as we have a release in early November. I'm afraid if I'll be able to work on this till then ☹️

[thinkingserious]

@tsriram,

No worries, thanks for following up!

[SendGridDX]

Hello @tsriram,

Are you still interested in continuing this work? We are currently beginning work on a redesign and completing this would be very helpful.

With Best Regards,

Elmer

[tsriram]

Hey @SendGridDX, I won't be able to work on this now as I've too many things to look after. Sorry guys :(

[SendGridDX]

No problem @tsriram,

Thanks for letting us know.

[thinkingserious]

Completed with this release: https://github.com/sendgrid/sendgrid-nodejs/releases/tag/v5.1.0