public void ShouldReturnNullToEmptyString()
{
// act
var(title, description, imageUrl) = WebpageService.ParseHtml(string.Empty);
// assert
Assert.Null(title);
Assert.Null(description);
Assert.Null(imageUrl);
}
public void ShouldParseHtmlWithTitleOnly()
{
// arrange
var file = File.ReadAllText(
Path.Combine(
Directory.GetCurrentDirectory(),
"Unit", "data", "page-with-title.html"));
// act
var(title, description, imageUrl) = WebpageService.ParseHtml(file);
// assert
Assert.Equal("Page with title", title);
Assert.Null(description);
Assert.Null(imageUrl);
}
public void ShouldParseHtmlWithAllFields()
{
// arrange
var file = File.ReadAllText(
Path.Combine(
Directory.GetCurrentDirectory(),
"Unit", "data", "complete-page.html"));
// act
var(title, description, imageUrl) = WebpageService.ParseHtml(file);
// assert
Assert.Equal(".NET | Free. Cross-platform. Open Source.", title);
Assert.Equal(".NET is a developer platform with tools and libraries for" +
" building any type of app, including web, mobile, desktop, games, " +
"IoT, cloud, and microservices.", description);
Assert.Equal("https://dotnet.microsoft.com/static/images/redesign/social/square.png", imageUrl);
}
public void ShouldThrowExceptionIfArgumentIsNull()
{
Assert.Throws <ArgumentNullException>(() => WebpageService.ParseHtml(null));
}
