lib/std/fs.zig      | 63 +++++++++++++++-----------------
 lib/std/fs/test.zig | 27 +++++++-------
 lib/std/os.zig      |  4 +-
 lib/std/testing.zig | 38 +++++++++++++++++++
 src/test.zig        | 10 ++---
 5 files changed, 88 insertions(+), 54 deletions(-)