public async Task DeleteDocumentAsync_Should_DeleteDocumentAndUpdateAffectedDocumentPositions(
int documentToDeletePosition, int affectedDocumentsCount)
{
// Arrange
var documentToDelete = _allDocuments[documentToDeletePosition - 1];
_documentsRepositoryMock
.Setup(r => r.GetDocumentsAsync())
.Returns(Task.FromResult(_allDocuments));
// Act
await _sut.DeleteDocumentAsync(documentToDelete);
// Assert
_documentsRepositoryMock
.Verify(r => r.DeleteDocumentAsync(documentToDelete.Id, It.Is <Document[]>(
documents => documents.Length == affectedDocumentsCount &&
(!documents.Any() || documents.All(x => x.Position == int.Parse(x.Id) - 1)))));
_contentStorageMock
.Verify(s => s.DeleteFile(It.Is <string>(name => name == Path.GetFileName(documentToDelete.Location))));
}
