Refactor summary resynthesis tests in preparation for using the one-phase summary API.

This CL refactors the summary resynthesis tests similar to how
05ab41c99b0972e75086ecbc3f617ba9a36da372 refactored the summary
generation tests.  It introduces the following classes:

- The interface `ResynthesizeTestStrategy`, defining the methods that
  can be invoked by tests of summary resynthesis.

- An implementation of that interface:
  `ResynthesizeTestStrategyTwoPhase`.  This drives the summary
  mechanism using the old two-phase summary API.

- Mixin classes `ExprBuilderTestCases` and `ResynthesizeTestCases`
  containing the test cases themselves.

- Mixin classes `ExprBuilderTestHelpers` and `ResynthesizeTestHelpers`
  containing helper methods used by the test cases.

There should be no functional change introduced by this CL, only code
motion.

Change-Id: Ifb84d4d2d8fa17bbc32b833b1f56af7e1217b5ae
Reviewed-on: https://dart-review.googlesource.com/75124
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
4 files changed
tree: aced5b8f26d8347267021822cfc45bc769246e9b
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. dartdoc_options.yaml
  27. DEPS
  28. LICENSE
  29. PATENTS
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. WATCHLISTS
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