Changed project structure and added Verify and AddHelpers

Author: job79

.idea/.idea.BlockChain/.idea/contentModel.xml

@@ -7,7 +7,7 @@
 using BlockChain.Core.Test.Block;
 using NUnit.Framework;
 
-namespace BlockChain.Core.Test
+namespace BlockChain.Core.Test.BlockChain
 {
     public class BlockChainTest
     {
@@ -38,11 +38,15 @@ public void AddAndReadTest()
 
             var token = new CancellationTokenSource();
             token.CancelAfter(TimeSpan.FromSeconds(TimeoutInSec));
-            block.Mine(token.Token);
+            var m =block.Mine(token.Token);
+            m.Wait();
+            block = m.Result;
 
             blockChain.Add(block);
 
-            Assert.IsTrue(TestHelper.ArrayEquals(block.ToArray(),blockChain.First().ToArray()),"Block is not added to the blockchain, or could not read the blockchain");
+            Assert.IsTrue(TestHelper.ArrayEquals(block.ToArray(),blockChain.First().ToArray()),
+                "Block is not added to the blockchain, or could not read the blockchain");
+            Assert.IsTrue(blockChain.First().IsValid(prevBlock.Hash(sha256),sha256),"Added block is not valid");
 
         }
     }

.idea/.idea.BlockChain/.idea/workspace.xml

@@ -0,0 +1,32 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using BlockChain.Core.Block;
+using BlockChain.Core.Test.Block;
+using NUnit.Framework;
+
+namespace BlockChain.Core.Test.BlockChain.Helpers
+{
+    public class AddHelpersTest
+    {
+        const string file = "blockchain3.db";
+        const int TimeoutInSec = 30;
+        [Test]
+        public void AddTest()
+        {
+            if(File.Exists(file)) File.Delete(file);
+            var blockChain = new BlockChain<TestBlockData>(file);
+            
+            var data = new TestBlockData("12345678910");
+            var token = new CancellationTokenSource();
+            token.CancelAfter(TimeSpan.FromSeconds(TimeoutInSec));
+            
+            blockChain.Add(data, token: token.Token).Wait();
+
+            Assert.IsTrue(TestHelper.ArrayEquals(data.ToArray(),blockChain.First().GetData().ToArray()),"Block is not added to the blockchain, or could not read the blockchain");
+            Assert.IsTrue(blockChain.First().IsValid(blockChain.First().GetBlockHeader().HashPrevBlock,blockChain.GetHashingAlgorithm()),"Added block is not valid");
+
+        }
+    }
+}

BlockChain.Core.Test/BlockChainTest.cs renamed to BlockChain.Core.Test/BlockChain/BlockChainTest.cs

@@ -0,0 +1,49 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using BlockChain.Core.Block;
+using BlockChain.Core.Test.Block;
+using NUnit.Framework;
+
+namespace BlockChain.Core.Test.BlockChain.Helpers
+{
+    public class VerifyHelperTest
+    {
+        const string file = "blockchain4.db";
+        const int TimeoutInSec = 30;
+        
+        [Test]
+        public async Task VerifyTest()
+        {
+            if(File.Exists(file)) File.Delete(file);
+            var blockChain = new BlockChain<TestBlockData>(file);
+            
+            var data = new[] { new TestBlockData("12345678910"),new TestBlockData("12345678911230"),new TestBlockData("123455678910"),new TestBlockData("1234567891120") };
+            var token = new CancellationTokenSource();
+            token.CancelAfter(TimeSpan.FromSeconds(TimeoutInSec));
+            foreach (var d in data) await blockChain.Add(d, token: token.Token);
+            
+            //Check blockchain
+            var x = await blockChain.Verify(token.Token);
+            Assert.IsTrue(x,"Valid blockchain was marked invalid");
+            
+            //Make blockchain invalid
+            MakeBlockChainInvalid(blockChain);
+            foreach (var d in data) await blockChain.Add(d, token: token.Token); //Add some random blocks
+            
+            //Check blockchain again
+            x = await blockChain.Verify(token.Token);
+            Assert.IsFalse(x,"Invalid blockchain was marked valid");
+        }
+
+        private void MakeBlockChainInvalid(BlockChain<TestBlockData> blockChain)
+        {
+            var blockWithInvalidMerkleRoot = new Block<TestBlockData>(Convert.FromBase64String(
+                "AQAAAAmKCD7tIp5wWCHSYMEE9XHhXHA4AQsH0gMQiiqQkIjwHgCynzH++oBbPhLPtQl1PNwX9KnuriDiafYwR6WMlRz5B3jtcrfXCB4AAP/yBwEAMTIzNDY1NDIzNTE0M2UAAAA="));
+            byte[] data = blockWithInvalidMerkleRoot.ToArray();
+            using var stream = new FileStream(file, FileMode.Append);
+            stream.Write(data, 0, data.Length);
+        }
+    }
+}