Feature: Implement full tests

[gkpty]

tests should be implemented for:

• resourceExists methods
• create Stack
• update Stack
• pull stack
• push stack
• delete stack

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proposed solutions

1. Localstack is a local (self-hosted) copy of AWS cloud that can be used to test AWS services. https://github.com/localstack/localstack.
   With localstack a stack can be created with torus, and then all of the resources can be tested using the resource exists method.
   This should be implemented locally and in the CI/CD service (travis).
2. Test the resourceExists methods for an existing stack within our account (for example the stack for the torus.host site)
3. Use aws-sdk-mock to mock the aws-sdk calls and assert for the method responses. https://www.npmjs.com/package/aws-sdk-mock
4. A combination of these options

[StephenTomlin]

Could I take a crack at it?

[gkpty]

Hi @StephenTomlin Sure! I assigned the issue to you. Feel free to go about it however you like and im glad to discuss any options/hurdles you might run into. Also, if you prefer another testing framework feel free to switch out mocha.

P.S. i just merged a PR that fixes the test for the generateTemplate method and i added CI with travis CI