Function TestCopyOfCopy

core/state/statedb_test.go:425–436

TestCopyOfCopy tests that modified objects are carried over to the copy, and the copy of the copy. See https://github.com/ethereum/go-ethereum/pull/15225#issuecomment-380191512

(t *testing.T)

// TestCopyOfCopy tests that modified objects are carried over to the copy, and the copy of the copy.
// See https://github.com/ethereum/go-ethereum/pull/15225#issuecomment-380191512
func TestCopyOfCopy(t *testing.T) {
	sdb, _ := New(common.Hash{}, NewDatabase(database.NewMemDatabase()))
	addr := common.HexToAddress("aaaa")
	sdb.SetBalance(addr, big.NewInt(42))

	if got := sdb.Copy().GetBalance(addr).Uint64(); got != 42 {
		t.Fatalf("1st copy fail, expected 42, got %v", got)
	}
	if got := sdb.Copy().Copy().GetBalance(addr).Uint64(); got != 42 {
		t.Fatalf("2nd copy fail, expected 42, got %v", got)
	}
}