[fasta] messages_test automatically wraps examples in part

Update the message_test to automatically create an example that wrappes
all already defined examples in a part.
For instance, if the example is

main.dart: main() { print("hello world"); }

create an additional example that is basically

main_wrapped.dart: part 'main.dart';
main.dart: part of 'main_wrapped.dart'; main() { print("hello world"); }
(as well as some additional comments to push any actual positions in the
main file ot of scope for valid positions in the wrapper file.

This doesn't work for everything, e.g. if the original main imports or
exports anything, the new test will fail. That's okay, the status file
has been updated accordingly.

The reason for adding it is that we currently have some bugs that causes
us to crash in situations like this, i.e. situations where a message is
coming from a position in a part where the same position doesn't exist
in the non-part file.
The status file has been updated for that too, although not in sorted order.

Change-Id: Ib67f85fca5e81e0b9e93cf2d79ab50c38cae4936
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/106082
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
2 files changed
tree: e5194ddc24d8412a35bcdcafb9bc2967df62090b
  1. .clang-format
  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  10. AUTHORS
  11. BUILD.gn
  12. CHANGELOG.md
  13. CONTRIBUTING.md
  14. DEPS
  15. LICENSE
  16. PATENTS
  17. PRESUBMIT.py
  18. README.dart-sdk
  19. README.md
  20. WATCHLISTS
  21. build/
  22. client/
  23. codereview.settings
  24. docs/
  25. pkg/
  26. runtime/
  27. samples-dev/
  28. samples/
  29. sdk/
  30. tests/
  31. third_party/
  32. tools/
  33. utils/
README.md

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