public void CanRewind()
{
using (NodeContext ctx = NodeContext.Create(this))
{
var cacheCoinView = new CachedCoinView(ctx.PersistentCoinView, DateTimeProvider.Default, this.loggerFactory);
var tester = new CoinViewTester(cacheCoinView);
Coin[] coins = tester.CreateCoins(5);
Coin[] coin = tester.CreateCoins(1);
// 1
uint256 h1 = tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
tester.Spend(coins[2]);
tester.Spend(coin[0]);
//2
tester.NewBlock();
//3
tester.NewBlock();
//4
Coin[] coin2 = tester.CreateCoins(1);
tester.NewBlock();
Assert.True(tester.Exists(coins[0]));
Assert.True(tester.Exists(coin2[0]));
Assert.False(tester.Exists(coins[2]));
Assert.False(tester.Exists(coin[0]));
//1
tester.Rewind();
Assert.False(tester.Exists(coin2[0]));
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
tester.Spend(coins[2]);
tester.Spend(coin[0]);
//2
uint256 h2 = tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.False(tester.Exists(coins[2]));
Assert.False(tester.Exists(coin[0]));
//1
Assert.True(h1 == tester.Rewind());
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
Coin[] coins2 = tester.CreateCoins(7);
tester.Spend(coins2[0]);
coin2 = tester.CreateCoins(1);
tester.Spend(coin2[0]);
//2
tester.NewBlock();
Assert.True(tester.Exists(coins2[1]));
Assert.False(tester.Exists(coins2[0]));
cacheCoinView.FlushAsync().Wait();
//3
tester.NewBlock();
//2
tester.Rewind();
Assert.True(tester.Exists(coins2[1]));
Assert.False(tester.Exists(coins2[0]));
Assert.False(tester.Exists(coin2[0]));
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
}
}
public void CanRewind()
{
using (NodeContext nodeContext = NodeContext.Create(this))
{
var dateTimeProvider = new DateTimeProvider();
var cacheCoinView = new CachedCoinView(nodeContext.PersistentCoinView, dateTimeProvider, this.loggerFactory, new NodeStats(dateTimeProvider));
var tester = new CoinViewTester(cacheCoinView);
Coin[] coinsA = tester.CreateCoins(5);
Coin[] coinsB = tester.CreateCoins(1);
tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Spend some coins.
tester.Spend(coinsA[2]);
tester.Spend(coinsB[0]);
tester.NewBlock();
// This will save an empty RewindData instance
tester.NewBlock();
// Create a new coin set/
Coin[] coinsC = tester.CreateCoins(1);
tester.NewBlock();
Assert.True(tester.Exists(coinsA[0]));
Assert.True(tester.Exists(coinsC[0]));
Assert.False(tester.Exists(coinsA[2]));
Assert.False(tester.Exists(coinsB[0]));
// We need to rewind 3 times as we are now rewinding one block at a time.
tester.Rewind(); // coinsC[0] should not exist any more.
tester.Rewind(); // coinsA[2] should be spendable again.
tester.Rewind(); // coinsB[2] should be spendable again.
Assert.False(tester.Exists(coinsC[0]));
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Spend some coins and esnure they are not spendable.
tester.Spend(coinsA[2]);
tester.Spend(coinsB[0]);
tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.False(tester.Exists(coinsA[2]));
Assert.False(tester.Exists(coinsB[0]));
// Rewind so that coinsA[2] and coinsB[0] become spendable again.
tester.Rewind();
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Create 7 coins in a new coin set and spend the first coin.
Coin[] coinsD = tester.CreateCoins(7);
tester.Spend(coinsD[0]);
// Create a coin in a new coin set and spend it.
Coin[] coinsE = tester.CreateCoins(1);
tester.Spend(coinsE[0]);
tester.NewBlock();
Assert.True(tester.Exists(coinsD[1]));
Assert.False(tester.Exists(coinsD[0]));
cacheCoinView.FlushAsync().Wait();
// Creates another empty RewindData instance.
tester.NewBlock();
// Rewind one block.
tester.Rewind();
// coinsD[1] was never touched, so should remain unchanged.
// coinsD[0] was spent but the block in which the changes happened was not yet rewound to, so it remains unchanged.
// coinsE[0] was spent but the block in which the changes happened was not yet rewound to, so it remains unchanged.
// coinsA[1] was not touched, so should remain unchanged.
// coinsB[1] was not touched, so should remain unchanged.
Assert.True(tester.Exists(coinsD[1]));
Assert.False(tester.Exists(coinsD[0]));
Assert.False(tester.Exists(coinsE[0]));
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Rewind one block.
tester.Rewind();
// coinsD[0] should now not exist in CoinView anymore.
// coinsE[0] should now not exist in CoinView anymore.
Assert.False(tester.Exists(coinsD[0]));
Assert.False(tester.Exists(coinsE[0]));
}
}
public void CanRewind()
{
using (NodeContext ctx = NodeContext.Create())
{
var cacheCoinView = new CachedCoinView(ctx.PersistentCoinView);
var tester = new CoinViewTester(cacheCoinView);
var coins = tester.CreateCoins(5);
var coin = tester.CreateCoins(1);
// 1
var h1 = tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
tester.Spend(coins[2]);
tester.Spend(coin[0]);
//2
tester.NewBlock();
//3
tester.NewBlock();
//4
var coin2 = tester.CreateCoins(1);
tester.NewBlock();
Assert.True(tester.Exists(coins[0]));
Assert.True(tester.Exists(coin2[0]));
Assert.False(tester.Exists(coins[2]));
Assert.False(tester.Exists(coin[0]));
//1
tester.Rewind();
Assert.False(tester.Exists(coin2[0]));
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
tester.Spend(coins[2]);
tester.Spend(coin[0]);
//2
var h2 = tester.NewBlock();
cacheCoinView.FlushAsync().Wait();
Assert.False(tester.Exists(coins[2]));
Assert.False(tester.Exists(coin[0]));
//1
Assert.True(h1 == tester.Rewind());
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
var coins2 = tester.CreateCoins(7);
tester.Spend(coins2[0]);
coin2 = tester.CreateCoins(1);
tester.Spend(coin2[0]);
//2
tester.NewBlock();
Assert.True(tester.Exists(coins2[1]));
Assert.False(tester.Exists(coins2[0]));
cacheCoinView.FlushAsync().Wait();
//3
tester.NewBlock();
//2
tester.Rewind();
Assert.True(tester.Exists(coins2[1]));
Assert.False(tester.Exists(coins2[0]));
Assert.False(tester.Exists(coin2[0]));
Assert.True(tester.Exists(coins[2]));
Assert.True(tester.Exists(coin[0]));
}
}
