NewCLI returns a SensuCLI instace with mocked values with json format.

NewFileCapture instantiates new FileCapture.

NewMockCLI return SensuCLI instance w/ mocked values.

RunCmd runs your SensuCLI command and returns any output and errors the command might have returned.

SimpleSensuCLI return SensuCLI instance w/ given client & live config.

FileCapture helps us write tests where we want to assert that something was written to STDOUT or STDERR.