- allow actual outputs to differ from expected (ie, `stat`) if `stat` is reporting "unknown" creation time
.# [why]
For many *nix flavors, `stat` is unable to detect birth/creation date
for directories/files. The information is available via the `statx()`
system call (for linux kernels >= v4.11), and rust supplies that
information via fs::MetadataExt for v1.40+. So, for rust v1.40+, there
will likely be a mismatch between the output of the system `stat` and
this ('uutils') `stat`.
* ref: <https://askubuntu.com/questions/470134/how-do-i-find-the-creation-time-of-a-file> @@ <https://archive.is/IsEAJ>
/dev/pts/ptmx seems to be the only character special file in /dev
which is not a bind-mount in the docker container run by travis.
gnu stat does not detect these mounts, so produces a different
output for /dev/zero.
Updates to individual integration tests
- use proposed conventional approach to beginning tests
- use new convenience functions for using fixtures
- use new names for TestScenario
Updates to integration test modules
- add proposed conventional module-level functions
Updates to test/common/util.rs
- rename TestSet, and its methods, for semantic clarity
- create convenience functions for use of fixtures
- delete convenience functions obsoleted by new conventions
