GetConfig returns a config for the test cases as a singleton.

NewReapchainCore creates a new reapchain-core server and sleeps forever.

RecreateConfig instructs the RPC test to recreate the configuration each time, instead of treating it as a global singleton.

StartReapchainCore starts a test reapchain-core server in a go routine and returns when it is initialized.

StopReapchainCore stops a test reapchain-core server, waits until it's stopped and cleans up test/config files.

SuppressStdout is an option that tries to make sure the RPC test ReapchainCore node doesn't log anything to stdout.

Options helps with specifying some parameters for our RPC testing for greater control.