public void Should_Verify_Incorrect_Hash()
{
// arrange
var genesis = Block.Genesis();
var secondBlock = MakeBlock(2, new Challenge().Solve(genesis.Proof), Sha256Hash.Of("invalid"), new List <Transaction>());
var thirdBlock = MakeBlock(3, secondBlock);
var chain = new List <Block>
{
genesis, secondBlock, thirdBlock
};
// act
var actual = Blockchain.Validate(chain);
// assert
actual.Should().BeFalse();
}
public void Should_Create_Genesis_Block()
{
// arrange
var expected = Block.Genesis();
// act
var blockchain = new Blockchain();
var actual = blockchain.Chain.First();
// assert
blockchain.Chain.Should().HaveCount(1);
actual.Should().NotBeNull();
actual.Index.Should().Be(1);
actual.Proof.Should().Be(new ProofOfWork(1));
actual.PreviousHash.Should().Be(Sha256Hash.Of("Genesis"));
actual.Transactions.Should().BeEmpty();
}
public void Should_Discard_Invalid_Blockchain()
{
// arrange
var blockchain = new Blockchain();
var genesis = Block.Genesis();
var secondBlock = MakeBlock(2, new Challenge().Solve(genesis.Proof), Sha256Hash.Of("invalid"), new List <Transaction>());
var thirdBlock = MakeBlock(3, secondBlock);
var invalidChain = new List <Block>
{
genesis, secondBlock, thirdBlock
};
// act
var actual = blockchain.ResolveConflicts(new List <IList <Block> > {
invalidChain.ToList()
});
// assert
actual.Should().BeFalse();
blockchain.Chain.Should().NotBeEmpty();
blockchain.Chain.Should().NotEqual(invalidChain);
}