[lit] Fix tests on Windows

max-time.py:
Windows does not have a native `sleep` command, use `time.sleep()` in
Python instead.

max-failures.py:
The max-failure test reused the shtest-shell tes

[lit] Fix tests on Windows

max-time.py:
Windows does not have a native `sleep` command, use `time.sleep()` in
Python instead.

max-failures.py:
The max-failure test reused the shtest-shell test inputs instead of
defining its own "test domain". However, the output of this
shtest-shell "test domain" is slightly different on Windows, which now
bites us since we made the max-failures test stricter. Let's define
our own "max failures" test domain.

show more ...

[lit] Add SKIPPED test result category

Track and print the number of skipped tests. Skipped tests are tests
that should have been executed but weren't due to:
* user interrupt [Ctrl+C]
* --max-

[lit] Add SKIPPED test result category

Track and print the number of skipped tests. Skipped tests are tests
that should have been executed but weren't due to:
* user interrupt [Ctrl+C]
* --max-time (overall lit timeout)
* --max-failures

This is part of a larger effort to ensure that all discovered tests are
properly accounted for.

Add test for overall lit timeout feature (`--max-time` option) to
observe skipped tests. Extend test for `--max-failures` option.

Reviewed By: jdenny

Differential Revision: https://reviews.llvm.org/D77819

show more ...