FakeExecCommand returns a FakeCommand which can record calls this is used to mock an exec.Cmd Adapted from https://npf.io/2015/06/testing-exec-command/.

IsHelper returns true if a process helper is wanted.

ReplaceFs replaces the real filesystem by a memory implementation.

TestFailRunHelper is a non zero exiting testing helper for go test subprocess mocking.

TestSummonRunHelper is a testing helper for go test subprocess mocking.

GetFs is a function that returns an Fs.

SetFs sets an app Fs.

Call is a recording of a fake call.