public void GetCharCounts_ShouldReturnDoubledValues_WhenSameFileAddedSecondTime()
{
var counter = new MultiFileCharacterCounter();
counter.Add(EmbeddedFiles.Large);
var firstResults = counter.GetCharCounts();
counter.Add(EmbeddedFiles.Large);
Assert.That(counter.GetCharCounts().All(secondResult => IsDoubled(secondResult, firstResults)));
}
public void GetCharCounts_ShouldReturnValue_WhenCalledWhileAddsAreOccurringOnOtherThreads()
{
const int NumAdds = 1000, NumGets = 10000;
var counter = new MultiFileCharacterCounter();
Task[] addTasks = Enumerable.Range(0, NumAdds).Select(i => Task.Factory.StartNew(() => counter.Add(EmbeddedFiles.Medium))).ToArray();
var results = Enumerable.Range(0, NumGets).Select(i => counter.GetCharCounts()).ToList();
Assert.That(results.All(d => d != null));
Task.WaitAll(addTasks);
}