New test: as a DApp developer, I'm able to perform contract preflight

[sreuland]

What problem does your feature solve?

What would you like to see?

new automated test for e2e case:

as a DApp developer, I'm able to perform preflight/simulation for a given contract from cli tool and Javascript.

test should be packaged in docker and as a go test and asserts on configurable versions of cli, rpc, contracts, network work together and emit contract events.

Part of the scope of this deliverable includes analysis to confirm/capture what a preflight means for a developer, i.e. the sequence of RPC calls, and what parameters for preflight the tests should exercise. This should include usage of new ledger entry retrieval functionality from RPC

for Javascript coverage, should assert results from Node execution and Browser(PhantomJS) execution environments.

What alternatives are there?

[sreuland]

this coverage is established now in cli and js by default as both clients invoke rpc preflight automatically as part of their contract invocation and/or 'prepareTransaction' interfaces.