public void ShouldCallDataRetrieverForCorrectLink()
{
// Arrange
var dataRetrieverMock = Substitute.For <IDataRetriever>();
var sut = new ImageLinksExtractor(dataRetrieverMock);
string testLinkToPage = "TargetPage";
// Act
var result = sut.Extract(testLinkToPage);
// Assert
dataRetrieverMock
.Received(1)
.RetrieveStringAsync(Arg.Is(testLinkToPage));
}
public void ShouldReturnLinksListWithAllImageLinks()
{
// Arrange
var dataRetrieverMock = Substitute.For <IDataRetriever>();
var sut = new ImageLinksExtractor(dataRetrieverMock);
string testLinkToPage = "http://ya.ru";
List <string> expectedLinks = new List <string>();
expectedLinks.Add("http://ya.ru/images/testImage1.png");
expectedLinks.Add("http://ya.ru/images/testImage2.png");
expectedLinks.Add("http://ya.ru/images/testImage3.png");
string testPageContent = @"<!DOCTYPE html>
<html>
<head>
<title>Using Image in Webpage</title>
</head>
<body>
<p>Simple Image Insert</p>
<img src = ""./images/testImage1.png"" alt = ""Test Image 1"" />
<img src = ""./images/testImage2.png"" alt = ""Test Image 2"" />
<img src = ""./images/testImage3.png"" alt = ""Test Image 3"" />
</body>
</html> ";
dataRetrieverMock
.RetrieveStringAsync(Arg.Is(testLinkToPage))
.Returns(testPageContent);
// Act
var result = sut.Extract(testLinkToPage).Result;
// Assert
CollectionAssert.AreEqual(result, expectedLinks);
}