var ErrorRequirements = errors.Errorf("missing requirements")

type ConfigUpdater interface {
	UpdateConfigFile(string) string
}

type Sandbox interface {
	Address() string
	PrintLogs(*testing.T)
	Cmd(...string) *exec.Cmd
	NewRegistry() (string, error)
	Rootless() bool
	Value(string) interface{} // chosen matrix value
}

type SandboxConf struct {
	// contains filtered or unexported fields
}

type SandboxOpt func(*SandboxConf)

type Test func(*testing.T, Sandbox)

type TestConf struct {
	// contains filtered or unexported fields
}

type TestOpt func(*TestConf)

type Worker interface {
	New(...SandboxOpt) (Sandbox, func() error, error)
	Name() string
}