public async Task ThenWillIndexManyReservationAtOnce() { //Act await _repository.CreateIndex(); //Assert _client.Verify(x => x.CreateIndicesWithMapping(It.Is <string>(c => c.StartsWith(_repository.IndexNamePrefix)), ExpectedMapping), Times.Once); _registryMock.Verify(r => r.Add(It.Is <string>(s => s.StartsWith(_repository.IndexNamePrefix))), Times.Once); }