Deferred warnings were originally intended to suppress output during
live display, ostensibly to avoid glitch scrolls.
Then, 1af74d1a7c added log capture to the
test-web process. Suddenly, deferred warnings became deadly because
they're flushed during a tiny window after the capture notifier has
stopped draining the tee pipe but before stderr is restored.
This caused a deadlock at exit. The fix is to remove this system and
call warnln directly because display integrity is now protected by
other means.
- Add --results-dir CLI flag to specify output directory
- Default to {tempdir}/test-web-results if not specified
- Capture stdout/stderr from all helper processes (WebContent,
RequestServer, ImageDecoder) to prevent output spam
- Save captured output to per-test files in results directory
- Save test diffs (expected vs actual) to results directory
- Generate HTML index of failed tests with links to diffs
- Display live-updating concurrent test status with progress bar
- Defer warning messages until after test run completes
The test logs tend to get a bit mixed together, so this makes it
possible to identify which values correspond to which test when multiple
are failing at once.
