public void Query_Range_During_Reorg_Success(int chainLength, int start, int?end)
{
// Simulate a reorg occuring mid-enumeration and check that the query still returns the full old chain.
var chainIndexer = new ChainIndexer(this.network);
ChainedHeader[] chainBeforeReorg = this.CreateChain(chainIndexer.Genesis, chainLength);
// Create a new reorg that removes 3 blocks and adds another 5.
ChainedHeader[] chainAfterReorg = this.CreateChain(chainBeforeReorg[chainLength - 3], 5);
chainIndexer.Initialize(chainBeforeReorg.Last());
var query = new ChainIndexerRangeQuery(chainIndexer);
IEnumerator <ChainedHeader> enumerator = query.EnumerateRange(start, end).GetEnumerator();
int position = start;
while (position < (end ?? chainBeforeReorg.Length))
{
enumerator.MoveNext();
ChainedHeader item = enumerator.Current;
// Trigger a reorg at position chainLength - 3
if (position == chainLength - 3)
{
// Remove two headers.
chainIndexer.Remove(chainIndexer.Tip);
chainIndexer.Remove(chainIndexer.Tip);
// Add the reorged chain's headers.
// Note: Most likely is that headers are removed only before the enumeration is completed.
chainIndexer.Add(chainAfterReorg[1]);
chainIndexer.Add(chainAfterReorg[2]);
chainIndexer.Add(chainAfterReorg[3]);
chainIndexer.Add(chainAfterReorg[4]);
}
Assert.Equal(chainBeforeReorg[position], item);
position++;
}
enumerator.Dispose();
}