a flat bitset

server/ecs/bitset_test.go

@@ -0,0 +1,28 @@
+package ecs
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestBitSet_And(t *testing.T) {
+	var set1, set2 BitSet
+
+	set1.Set(1)
+	set1.Set(3)
+	set1.Set(40)
+
+	set2.Set(2)
+	set2.Set(3)
+	set2.Set(9)
+	set2.Set(40)
+
+	var results []Index
+	set1.And(&set2).Range(func(eid Index) {
+		results = append(results, eid)
+	})
+	want := []Index{3, 40}
+	if !reflect.DeepEqual(results, want) {
+		t.Errorf("want %v, got: %v", want, results)
+	}
+}