public void CreateReaderThrowsIfNoReadersCanHandleFile()
{
// Arrange
IFileSystem fs = Substitute.For <IFileSystem>();
IFileInfoFactory fileInfoFactory = Substitute.For <IFileInfoFactory>();
fileInfoFactory.FromFileName(Arg.Any <string>())
.ReturnsForAnyArgs(Substitute.For <FileInfoBase>());
fs.FileInfo.ReturnsForAnyArgs(fileInfoFactory);
IDuplicateReader incorrectReader1 = Substitute.For <IDuplicateReader>();
incorrectReader1.CanHandle(Arg.Any <FileInfoBase>()).Returns(false);
IDuplicateReader incorrectReader2 = Substitute.For <IDuplicateReader>();
incorrectReader2.CanHandle(Arg.Any <FileInfoBase>()).Returns(false);
DuplicateReaderFactory uut = new DuplicateReaderFactory(
config: Substitute.For <IDuplicateHandlerConfiguration>(),
fileSystem: fs,
readers: new[] { incorrectReader1, incorrectReader2 });
// Act & Assert
Assert.Throws <ArgumentException>(() => uut.CreateReader());
}
public void CreateReaderChoosesCorrectReader()
{
// Arrange
IFileSystem fs = Substitute.For <IFileSystem>();
IFileInfoFactory fileInfoFactory = Substitute.For <IFileInfoFactory>();
fileInfoFactory.FromFileName(Arg.Any <string>())
.ReturnsForAnyArgs(Substitute.For <FileInfoBase>());
fs.FileInfo.ReturnsForAnyArgs(fileInfoFactory);
IDuplicateReader correctReader = Substitute.For <IDuplicateReader>();
correctReader.CanHandle(Arg.Any <FileInfoBase>()).Returns(true);
IDuplicateReader incorrectReader1 = Substitute.For <IDuplicateReader>();
incorrectReader1.CanHandle(Arg.Any <FileInfoBase>()).Returns(false);
IDuplicateReader incorrectReader2 = Substitute.For <IDuplicateReader>();
incorrectReader2.CanHandle(Arg.Any <FileInfoBase>()).Returns(false);
DuplicateReaderFactory uut = new DuplicateReaderFactory(
config: Substitute.For <IDuplicateHandlerConfiguration>(),
fileSystem: fs,
readers: new[] { incorrectReader1, correctReader, incorrectReader2 });
// Act
IDuplicateReader selectedReader = uut.CreateReader();
// Assert
Assert.Same(correctReader, selectedReader);
}
