CheckError checks the given error taking into account if it was expected and potentially the message it should carry.

CreateTestFiles creates the files in the map (path -> content) using the given afero file system.

GetEnv reads an environment variable, returning a given default value if not present.

ParseMetricFamilies parsing prometheus response from http endpoint.

ReadBytecode reads the bytecode of the given contract.

WaitUntil waits for the given WaitGroup to end.