Go kosu/integration against testnet

[gchaincl]

Overview

Rewrite of the integration test suite in order to use an existing/running testnet

Description

We needed to replace the previous test framework (Convey).
Tests are organized in such a way that each of them will run on a new block; subtests don't have that guarantee.

Testing instructions

We will need the Testnet endpoints and homedir path (we need the path in order to get the private keys).

The testnet parameter is configured using KOSU_TEST_NODES
KOSU_TEST_NODES is a comma-separated list of nodes following this format:
homedir1>[@url],... where:

• is required and points to the node home directory
• is optional and represents the node URL, if not specified it will take the url from config.RPC.ListenAddress

In my current setup, I start the testnet using make testnet and run the tests as follows:

 KOSU_TEST_NODES=$(pwd)/testnet/node0@localhost:8000,\
$(pwd)/testnet/node1@localhost:8001,\
$(pwd)/testnet/node2@localhost:8002,\
$(pwd)/testnet/node3@localhost:8003 go test ./tests/... -v -count=1 -run TestIntegrationTestSuite

Note that now the -tags=integration is not required, the test will be skipped if the KOSU_TEST_NODES has not been set.

[hrharder]

Looks great. This is a really great improvement for the integration test suite! 🎉