Function TestWorld_SortSystems

world_test.go:108–141

(t *testing.T)

func (s *priorityChangeSystem) Update(dt float32) {}

func TestWorld_SortSystems(t *testing.T) {
	w := new(World)
	one := priorityChangeSystem{Rank: 1}
	w.AddSystem(&one)
	two := priorityChangeSystem{Rank: 2}
	w.AddSystem(&two)
	expected := []System{
		&two,
		&one,
	}
	for idx, sys := range w.Systems() {
		p := sys.(Prioritizer)
		exp := expected[idx].(Prioritizer)
		if p.Priority() != exp.Priority() {
			t.Error("Systems were not in the correct order")
		}
	}
	one.Rank = 5
	for idx, sys := range w.Systems() {
		p := sys.(Prioritizer)
		exp := expected[idx].(Prioritizer)
		if p.Priority() != exp.Priority() {
			t.Error("Systems were switched before sort wwas called")
		}
	}
	w.SortSystems()
	for idx, sys := range w.Systems() {
		p := sys.(Prioritizer)
		exp := expected[len(expected)-1-idx].(Prioritizer)
		if p.Priority() != exp.Priority() {
			t.Error("Systems were switched before sort wwas called")
		}
	}
}