public async Task RemoveServiceTicketWithExistKey_ShouldRemoveEntry()
        {
            // Arrange
            var expected = GenerateNewServiceTicket();
            var key      = await _serviceTickets.StoreAsync(expected).ConfigureAwait(false);

            // Act
            await _serviceTickets.RemoveAsync(key).ConfigureAwait(false);

            // Assert
            var actual = await _serviceTickets.RetrieveAsync(key).ConfigureAwait(false);

            Assert.Null(actual);
        }
 public Task RemoveAsync(string key)
 {
     return(_store.RemoveAsync(key));
 }