public FakeFileSystem()
{
FileOperation = new FileOperation(
readFile: file => InputFiles[file.NormalizeDirectorySeparators()],
writeFile: (file, content) => OutputFiles[file.NormalizeDirectorySeparators()] = content,
fileExists: file => InputFiles.ContainsKey(file.NormalizeDirectorySeparators()),
createDirectory: dir => { },
fileCopy: (source, dest, overwrite) => { });
// Unfortunately DotLiquid uses a mutable static field for its reference to the root directory.
// It's fine for non-test scenarios because the root won't change, but it makes unit testing
// with different roots a bit of a pain. So we define the static field centrally so all unit tests
// use the same root.
Template.FileSystem = new NessieLiquidFileSystem(FileOperation, Root);
}