public async Task NullIsReturnedWhenNoExtractorWasFound()
{
// Arrange
var repository = new MediaExtractorRepository();
// Act
var url = await repository.ExtractMedia("test");
// Assert
Assert.IsNull(url);
}
public async Task NonMatchingExtractorIsNotUsed()
{
// Arrange
var repository = new MediaExtractorRepository();
var extractor = new Mock <IMediaExtractor>();
extractor.Setup(v => v.CanExtract("test")).Returns(false);
extractor.Setup(v => v.GetMediaUrl("test")).Verifiable();
repository.AddExtractor(extractor.Object);
// Act
await repository.ExtractMedia("test");
// Assert
extractor.Verify(v => v.CanExtract("test"), Times.Once());
extractor.Verify(v => v.GetMediaUrl("test"), Times.Never());
}
public async Task SearchEndsWithFirstMatch()
{
// Arrange
var repository = new MediaExtractorRepository();
var e1 = new Mock <IMediaExtractor>();
e1.Setup(e => e.CanExtract("test")).Returns(true);
var e2 = new Mock <IMediaExtractor>();
e2.Setup(e => e.CanExtract("test")).Returns(true);
repository.AddExtractor(e1.Object);
repository.AddExtractor(e2.Object);
// Act
await repository.ExtractMedia("test");
// Assert
e1.Verify(v => v.CanExtract("test"), Times.Once());
e2.Verify(v => v.CanExtract("test"), Times.Never());
}
public async Task AllExtractorsAreChecked()
{
// Arrange
var repository = new MediaExtractorRepository();
var e1 = new Mock <IMediaExtractor>();
e1.Setup(e => e.CanExtract("test")).Returns(false);
var e2 = new Mock <IMediaExtractor>();
e2.Setup(e => e.CanExtract("test")).Returns(false);
repository.AddExtractor(e1.Object);
repository.AddExtractor(e2.Object);
// Act
await repository.ExtractMedia("test");
// Assert
e1.Verify(v => v.CanExtract("test"), Times.Once());
e2.Verify(v => v.CanExtract("test"), Times.Once());
}