The `goog.testing.fs.FileSystem` Class

`goog.testing.fs.FileSystem(opt_name)`

A mock filesystem object.

opt_name {string=}: The name of the filesystem.

`.getName()`

returns {string}
@see: {goog.fs.FileSystem#getName}

`.getRoot()`

returns {!goog.testing.fs.DirectoryEntry}
@see: {goog.fs.FileSystem#getRoot}