Question

I am writing a number of unit tests for a logger class I created and I want to simulate the file class. I can’t find the interface that I need to use to create the MOQ… so how do you successfully MOQ a class without an interface?

It also isn’t clear to me how I can use dependency injection without having an interface available:

private FileInfo _logFile;

public LogEventProcessorTextFile(FileInfo logFile) {
    _logFile = logFile;
}

When I really want to do something like this (note IFileInfo instead of FileInfo):

private IFileInfo _logFile;

public LogEventProcessorTextFile(IFileInfo logFile) {
    _logFile = logFile;
}

Answer 1

Use SystemWrapper, a library which provides interfaces and mockable wrappers classes for many .NET classes which don’t implement interfaces themselves.