// Ensure that DB stats can be substracted from one another.
func TestDBStats_Sub(t *testing.T) {
var a, b bolt.Stats
a.TxStats.PageCount = 3
a.FreePageN = 4
b.TxStats.PageCount = 10
b.FreePageN = 14
diff := b.Sub(&a)
equals(t, 7, diff.TxStats.PageCount)
// free page stats are copied from the receiver and not subtracted
equals(t, 14, diff.FreePageN)
}
// Ensure that DB stats can be subtracted from one another.
func TestDBStats_Sub(t *testing.T) {
var a, b bolt.Stats
a.TxStats.PageCount = 3
a.FreePageN = 4
b.TxStats.PageCount = 10
b.FreePageN = 14
diff := b.Sub(&a)
if diff.TxStats.PageCount != 7 {
t.Fatalf("unexpected TxStats.PageCount: %d", diff.TxStats.PageCount)
}
// free page stats are copied from the receiver and not subtracted
if diff.FreePageN != 14 {
t.Fatalf("unexpected FreePageN: %d", diff.FreePageN)
}
}