BitSharp.Core.Test.Storage.IChainStateCursorTest.TestTryUpdateUnspentTx C# (CSharp) Method

        private void TestTryUpdateUnspentTx(ITestStorageProvider provider)
        {
            var unspentTx = new UnspentTx(txHash: UInt256.Zero, blockIndex: 0, txIndex: 0, txVersion: 0, isCoinbase: false, outputStates: new OutputStates(1, OutputState.Unspent));
            var unspentTxUpdated = unspentTx.SetOutputState(0, OutputState.Spent);
            Assert.AreNotEqual(unspentTx, unspentTxUpdated);

            using (var storageManager = provider.OpenStorageManager())
            using (var handle = storageManager.OpenChainStateCursor())
            {
                var chainStateCursor = handle.Item;

                // begin transaction
                chainStateCursor.BeginTransaction();

                // verify can't update missing unspent tx
                Assert.IsFalse(chainStateCursor.TryUpdateUnspentTx(unspentTx));

                // add unspent tx
                Assert.IsTrue(chainStateCursor.TryAddUnspentTx(unspentTx));

                // verify unspent tx
                UnspentTx actualUnspentTx;
                Assert.IsTrue(chainStateCursor.TryGetUnspentTx(unspentTx.TxHash, out actualUnspentTx));
                Assert.AreEqual(unspentTx, actualUnspentTx);

                // update unspent tx
                Assert.IsTrue(chainStateCursor.TryUpdateUnspentTx(unspentTxUpdated));

                // verify updated unspent tx
                Assert.IsTrue(chainStateCursor.TryGetUnspentTx(unspentTx.TxHash, out actualUnspentTx));
                Assert.AreEqual(unspentTxUpdated, actualUnspentTx);

                // remove unspent tx
                Assert.IsTrue(chainStateCursor.TryRemoveUnspentTx(unspentTx.TxHash));

                // verify can't update missing unspent tx
                Assert.IsFalse(chainStateCursor.TryUpdateUnspentTx(unspentTx));
            }
        }