public async Task ExportToXml()
{
// given
List <Page> actualPages = _fixture.CreateMany <Page>().ToList();
_pageRepositoryMock.AllPagesAsync()
.Returns(actualPages);
XmlSerializer serializer = new XmlSerializer(typeof(List <Page>));
// when
string actualXml = await _exportController.ExportPagesToXml();
// then
var deserializedPages = serializer.Deserialize(new StringReader(actualXml)) as List <Page>;
deserializedPages.Count.ShouldBe(actualPages.Count());
}