public void GetBackgroundPage_ForInvalidPage_ThrowsArgumentException(int invalidPageNumber)
{
int numPages = 1;
var pageMapper = new BackgroundPageMapper(1, new BackgroundPage(), 0, 0);
int bgPage;
Assert.Throws <ArgumentException>(() => pageMapper.GetBackgroundPageNumber(invalidPageNumber, numPages, out bgPage));
}
private int MapPage(int page, int numPages, BackgroundPageMapper mapper)
{
int bgPage;
if (!mapper.GetBackgroundPageNumber(page, numPages, out bgPage))
{
return(-1);
}
return(bgPage);
}