public async void Download_ReturnsEmptyDocument()
{
HtmlDocument emptyDocument = new HtmlDocument();
Mock <IWebClientService> webClientMock = new Mock <IWebClientService>();
webClientMock.Setup(a => a.FromWebAsync(It.IsAny <string>())).ReturnsAsync(emptyDocument);
DotnetCrawlerDownloader downloader = new DotnetCrawlerDownloader(webClientMock.Object);
HtmlDocument result = await downloader.Download(It.IsAny <string>());
result.Should().Be(emptyDocument);
webClientMock.Verify(m => m.FromWebAsync(It.IsAny <string>()), Times.Exactly(1));
}
public async void Download_ReturnsHeadingText()
{
HtmlDocument emptyDocument = new HtmlDocument();
string html = DummyHtml();
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
Mock <IWebClientService> webClientMock = new Mock <IWebClientService>();
webClientMock.Setup(a => a.FromWebAsync(It.IsAny <string>())).ReturnsAsync(htmlDocument);
DotnetCrawlerDownloader downloader = new DotnetCrawlerDownloader(webClientMock.Object);
HtmlDocument result = await downloader.Download(It.IsAny <string>());
string headingText = result.DocumentNode.SelectSingleNode("//body/h1/text()").InnerText;
headingText.Should().Be("First heading");
webClientMock.Verify(m => m.FromWebAsync(It.IsAny <string>()), Times.Exactly(1));
}