Add examples for working with different testing frameworks

[jfairbank]

This should go in the docs and maybe even an examples/ folder if someone wants to tackle that.

Would covering the frameworks below be sufficient or are there other popular ones that I'm missing?

• [ ] Jest
• [ ] Mocha
• [ ] Jasmine
• [ ] Tape
• [ ] Ava

[dcarrot2]

@jfairbank I can do some examples with Jest, using this in our current project.

[jfairbank]

That would be great @dcarrot2!

If you can, please provide examples with expectSaga and testSaga, but whatever you can provide will be great regardless.

Thanks!

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[codershona]

Hello, Can I work on this issue? @jfairbank . I can fix this issue and add more popular testing frameworks for example: enzyme, chai etc.