test: battle multiple non-crossing enemies

internal/model/game/game.go

@@ -39,6 +39,15 @@ func (ts TechSet) Set(t Tech, v float64) TechSet {
 	return m
 }
 
+func NewTechSet() TechSet {
+	return TechSet{
+		TechDrive:   1.,
+		TechWeapons: 1.,
+		TechShields: 1.,
+		TechCargo:   1.,
+	}
+}
+
 // TODO: turn's incremental Version
 type Game struct {
 	ID         uuid.UUID   `json:"id"`