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Copy ut from https://github.com/neo-project/neo/pull/947 #952

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Jul 24, 2019
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Copy ut from https://github.com/neo-project/neo/pull/947 #952

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101 changes: 101 additions & 0 deletions neo.UnitTests/UT_DataCache.cs
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using Microsoft.VisualStudio.TestTools.UnitTesting;
using Neo.IO.Caching;
using Neo.Ledger;
using System.Linq;

namespace Neo.UnitTests
{
[TestClass]
public class UT_DataCache
{
[TestInitialize]
public void TestSetup()
{
TestBlockchain.InitializeMockNeoSystem();
}

[TestMethod]
public void TestCachedFind_Between()
{
var snapshot = TestBlockchain.GetStore().GetSnapshot();
var storages = snapshot.Storages;
var cache = new CloneCache<StorageKey, StorageItem>(storages);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);

storages.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x01 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);
storages.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x03 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);
cache.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x02 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);

CollectionAssert.AreEqual(
cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
new byte[] { 0x01, 0x02, 0x03 }
);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);
}

[TestMethod]
public void TestCachedFind_Last()
{
var snapshot = TestBlockchain.GetStore().GetSnapshot();
var storages = snapshot.Storages;
var cache = new CloneCache<StorageKey, StorageItem>(storages);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);

storages.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x01 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);
cache.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x02 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);

CollectionAssert.AreEqual(
cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
new byte[] { 0x01, 0x02 }
);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);
}

[TestMethod]
public void TestCachedFind_Empty()
{
var snapshot = TestBlockchain.GetStore().GetSnapshot();
var storages = snapshot.Storages;
var cache = new CloneCache<StorageKey, StorageItem>(storages);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);

cache.Add
(
new StorageKey() { Key = new byte[] { 0x00, 0x02 }, ScriptHash = UInt160.Zero },
new StorageItem() { IsConstant = false, Value = new byte[] { } }
);

CollectionAssert.AreEqual(
cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
new byte[] { 0x02 }
);

storages.DeleteWhere((k, v) => k.ScriptHash == UInt160.Zero);
}
}
}