public async Task Retry_CloseAsyncSuccessDisposesHandler_Throws()
{
var contextMock = Substitute.For <IPipelineContext>();
var innerHandlerMock = Substitute.For <IDelegatingHandler>();
var cancellationToken = new CancellationToken();
innerHandlerMock.OpenAsync(cancellationToken).Returns(t => TaskHelpers.CompletedTask);
innerHandlerMock.CloseAsync(cancellationToken).Returns(t => TaskHelpers.CompletedTask);
var sut = new RetryDelegatingHandler(contextMock, innerHandlerMock);
await sut.OpenAsync(cancellationToken).ConfigureAwait(false);
await sut.CloseAsync(cancellationToken).ConfigureAwait(false);
await((Func <Task>)(() => sut.OpenAsync(cancellationToken))).ExpectedAsync <ObjectDisposedException>().ConfigureAwait(false);
}