FakeFileSystem::copy_file
usesErrorKind::NotFound
on attempts to copy a file that doesn't existFakeFileSystem::remove_dir_all
requires all descendants to be readable, corresponding to the behaviour ofOsFileSystem::remove_dir_all
FileSystem::read_file_into
method (thanks @jean-airoldie)
FakeFileSystem::read_dir
now returns only children, not all descendants (thanks @jean-airoldie)