public void Scrape_One_ImporterCalledOnce()
{
_parser.Setup(p => p.Parse(_page1)).Returns(new Post[30]);
var scraper = new HackerNewsScraper(_importer.Object, _parser.Object, _formatter.Object, _exporter.Object);
scraper.Scrape(1);
_importer.Verify(i => i.Import(It.IsAny<string>()), Times.Once);
}
public void Scrape_One_FormatterCalledOnceOnListOfCountOne()
{
_parser.Setup(p => p.Parse(_page1)).Returns(new Post[30]);
var scraper = new HackerNewsScraper(_importer.Object, _parser.Object, _formatter.Object, _exporter.Object);
scraper.Scrape(1);
_formatter.Verify(i => i.Format(It.Is<List<Post>>(p=>p.Count==1)), Times.Once);
}
public void Scrape_One_FormatterCalledOnceOnListStartingWithFirstPost()
{
var parsed = new Post[30];
_parser.Setup(p => p.Parse(_page1)).Returns(parsed);
var scraper = new HackerNewsScraper(_importer.Object, _parser.Object, _formatter.Object, _exporter.Object);
scraper.Scrape(1);
_formatter.Verify(i => i.Format(It.Is<List<Post>>(p => p[0] == parsed[0])), Times.Once);
}
public void Scrape_OneHundred_ImporterCalledFourTimes()
{
_parser.Setup(p => p.Parse(_page1)).Returns(new Post[30]);
_parser.Setup(p => p.Parse(_page2)).Returns(new Post[29]);
_parser.Setup(p => p.Parse(_page3)).Returns(new Post[28]);
_parser.Setup(p => p.Parse(_page4)).Returns(new Post[27]);
var scraper = new HackerNewsScraper(_importer.Object, _parser.Object, _formatter.Object, _exporter.Object);
scraper.Scrape(100);
_importer.Verify(i => i.Import(It.IsAny<string>()), Times.Exactly(4));
}
public void Scrape_Zero_ThrowsArgumentOutOfRangeException()
{
var scraper = new HackerNewsScraper(_importer.Object, _parser.Object, _formatter.Object, _exporter.Object);
Assert.ThrowsException<ArgumentOutOfRangeException>(() => scraper.Scrape(0));
}