This isn't fully POSIX shell, because POSIX shell still doesn't have
`local' variable declarations, but at least it is reasonably portable
now.
fix https://github.com/heimdal/heimdal/issues/1299
- `test_section "..."` replaces `echo "Now we're testing ..."`
- `test_run ...` replaces `... || { ...; eval "testsfailed"; }`
- `test_run not ...` replaces `... && { ...; eval "testsfailed"; }`
`test_section` saves the output of the program and shows it only in the
case of failures.
`test_run` arranges to exit with non-zero status if a test fails.
Use `set -e` to force early exit. Conversely use `set +e` to continue
running the remaining tests when one fails -- this will be very useful
in reducing the number of CI test runs (e.g., GitHub Actions), thus
saving time and money.
This is Claude-generated code, guided by me, with minor corrections.
