public async Task Upload_Produces_Diagnostic_When_Removing_Record(string username)
{
var diag = new Mock <IDiagnosticFactory>();
using (var s = new SoulseekClient(diagnosticFactory: diag.Object))
{
var dict = s.GetProperty <ConcurrentDictionary <string, SemaphoreSlim> >("UploadSemaphores");
var sem = new SemaphoreSlim(1, 1);
dict.TryAdd(username, sem);
await s.InvokeMethod <Task>("CleanupUploadSemaphoresAsync");
}
diag.Verify(m => m.Debug(It.Is <string>(s => s.ContainsInsensitive($"cleaned up upload semaphore for {username}"))), Times.Once);
}