System tests: tighten 'is' operator

Fix day-one sloppiness: when I first wrote this framework
it compared strings using 'expr', not '=', to be more
forgiving of extra cruft in output. This was a bad decision.
It means that warnings or additional text are ignored:

    is "all is ok, NOT!"  "all is ok"  <-- this would pass

Solution: tighten up the 'is' check. Use '=' (direct
compare) first. If it fails, look for wild cards ('*')
or character classes ('[') in the expect string. If
so, and only then, use 'expr'. And, thanks to a clever
suggestion from Luap99, include '(using expr)' in the
error message when we do so; this could make it easier
for a developer to understand a string mismatch.

This change exposes a lot of instances in which we weren't
doing proper comparisons. Fix those. Thankfully, there
weren't as many as I'd feared.

Also, and completely unrelated, add '-T' flag to bats
helper, for showing timing results. (I will open this
as a separate PR if requested. I too find it offensive
to jumble together unrelated commits.)

Signed-off-by: Ed Santiago <santiago@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/test/system/005-info.bats b/test/system/005-info.bats
index 0ea0f8356..045045fa6 100644
--- a/test/system/005-info.bats
+++ b/test/system/005-info.bats
@@ -37,7 +37,7 @@ cgroupVersion: v[12]
     # FIXME: if we're ever able to get package versions on Debian,
     #        add '-[0-9]' to all '*.package' queries below.
     tests="
-host.buildahVersion       | [0-9.]
+host.buildahVersion       | [1-9][0-9]*\.[0-9.]\\\+.*
 host.conmon.path          | $expr_path
 host.conmon.package       | .*conmon.*
 host.cgroupManager        | \\\(systemd\\\|cgroupfs\\\)