BitStorage implement like mojang

save/bitstorage_test.go

@@ -0,0 +1,28 @@
+package save
+
+import (
+	"reflect"
+	"testing"
+)
+
+var data = []uint64{0x0020863148418841, 0x01018A7260F68C87}
+var want = []int{1, 2, 2, 3, 4, 4, 5, 6, 6, 4, 8, 0, 7, 4, 3, 13, 15, 16, 9, 14, 10, 12, 0, 2}
+
+func TestBitStorage_Get(t *testing.T) {
+	bs := NewBitStorage(5, 24, data)
+	for i := 0; i < 24; i++ {
+		if got := bs.Get(i); got != want[i] {
+			t.Errorf("Decode error, got: %d but expected: %d", got, want[i])
+		}
+	}
+}
+
+func TestBitStorage_Set(t *testing.T) {
+	bs := NewBitStorage(5, 24, nil)
+	for i := 0; i < 24; i++ {
+		bs.Set(i, want[i])
+	}
+	if !reflect.DeepEqual(bs.data, data) {
+		t.Errorf("Encode error, got %v but expected: %v", bs.data, data)
+	}
+}