Adds tests for Near.call

[elliotBraem]

Implements tests for Near.call, according to #22

User is not logged in

• should throw 'No wallet selected' error

User is logged in

Arguments: (contractName, methodName, args?, gas?, deposit?)

• should throw error if appropriate arguments are not provided (over 5 args)
• should open confirmation modal with appropriate details

Arguments: ({ tx })

• should throw error if transaction object argument is invalid (single string provided)
• should open confirmation modal with appropriate details

Arguments: [{ tx }, ...]

• should open confirmation modal with appropriate details, multiple transactions

[jaswinder6991]

This looks good foundational work @elliotBraem. Thanks a lot.

I am working on Near.view tests.

I think we should split tests/vm/near.spec.js into near-call.spec.js, near-view.spec.js and so on.

[elliotBraem]

Thanks @jaswinder6991! I've taken your recommendation and moved these tests to near-call.js

These tests should cover the most basic functionalities for Near.call now and should serve as a good foundation for further improvements