public void GetSlides()
{
const string file = "../../files/GetTexts.pptx";
Pptx pptx = new Pptx(file, FileAccess.Read);
int nbSlides = pptx.SlidesCount();
Assert.AreEqual(3, nbSlides);
IEnumerable<PptxSlide> slides = pptx.GetSlides();
Assert.AreEqual(3, slides.Count());
pptx.Close();
}