public void HashTest()
{
var block = new SimpleBlock(2, "2", 0, "new block");
var hashProvider = new SHA256HashProvider();
hashProvider.Hash(block);
Assert.Equal(block.Hash, "b77f43514bcd6c8c963b94c0bb66cbd6da8f5606599f9a32581d22368df02a81");
}
public void VerifyTest()
{
var blockWithValidHash = new SimpleBlock(2, "2", 0, "new block", "b77f43514bcd6c8c963b94c0bb66cbd6da8f5606599f9a32581d22368df02a81");
var blockWithInvalidHash = new SimpleBlock(2, "2", 0, "new block", "b22f43514bcd6c8c963b94c0bb66cbd6da8f5606599f9a32581d22322df02a22");
var hashProvider = new SHA256HashProvider();
var validBlockResult = hashProvider.Verify(blockWithValidHash);
var invalidBlockResult = hashProvider.Verify(blockWithInvalidHash);
Assert.True(validBlockResult);
Assert.False(invalidBlockResult);
}
public void SHA256SignatureProvider_HashString_ReturnsCorrectHash()
{
//Arrange
string hashedString;
using (var hash = SHA256.Create())
{
hashedString = Convert.ToBase64String(hash.ComputeHash(Encoding.UTF8.GetBytes("test")));
}
var hashProvider = new SHA256HashProvider();
//Act
var signature = hashProvider.Hash("test");
//Assert
Assert.Equal(hashedString, signature);
}
public void IsValidNewBlockTest()
{
var hasher = new SHA256HashProvider();
var factory = new SimpleBlockFactory(hasher);
var blockchain = new SimpleBlockChain(hasher, factory);
var genesisBlock = factory.CreateGenesisBlock();
var blockWithBadIndex = new SimpleBlock(0, "1", 0, "new block", "0");
Assert.False(blockchain.IsValidNewBlock(genesisBlock, blockWithBadIndex));
var blockWithBadHash = new SimpleBlock(1, "1", 0, "new block", "VERY BAD HASH");
Assert.False(blockchain.IsValidNewBlock(genesisBlock, blockWithBadHash));
var validBlock = new SimpleBlock(2, "2", 0, "new block");
hasher.Hash(validBlock);
Assert.False(blockchain.IsValidNewBlock(genesisBlock, blockWithBadHash));
}
