sys

type Env interface {
	// Get gets the environment variable of the given name.
	Get(name string) string
}

type FS interface {
	// ReadAll gets the contents of filename, or an error if the file didn't exist or there was an
	// error reading it.
	ReadFile(filename string) ([]byte, error)

	// RemoveAll removes all of the files under the directory at name. It behaves similarly to the
	// func of the same name in the os package (https://godoc.org/os#RemoveAll).
	RemoveAll(name string) error
}

type FakeEnv struct {
	// Envs is the map from which Get calls will look to retrieve environment variables.
	Envs map[string]string
}

type FakeFS struct {
	Files map[string][]byte
}

type FakeFileNotFound struct {
	Filename string
}