Pre-Windows-VM hardening — the parts validatable on Linux, leaving the
unrunnable FFI (Job Object, T-424) for the VM session:
- Clamp PTY cols/rows to >= 2 in both backends' spawn + resize (new
pty_size.dart). A 1-column ConPTY makes conhost spin emitting CRLF
(microsoft/terminal#19922); 0 is invalid on both platforms.
- ci/test.sh: --timeout 60s on the dart-test pty line (matches the flutter
lines) so a wedged ConPTY reader fails fast instead of hanging the run.
- Make windows_pty.dart's pure helpers public + testable off-Windows:
quoteArg (MSVCRT quoting), composeEnvironmentBlock, and resolveExecutable
(now takes an injectable existence probe). New windows_pty_args_test.dart
+ pty_size_test.dart give 15 cross-platform assertions over the trickiest
Windows logic the on-Windows smoke suite can't reach off-platform.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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