[gidl][rust] Use equality builder

This CL changes the GIDL Rust backend to use an equality builder for
decode_success tests instead of always constructed an "expected" value
and using a single `assert_eq!`. See fxbug.dev/116269 for a rationale.

Bug: 116269
Test: fx test fidl_rust_conformance_tests --host
Multiply: host_x64/fidl-c-conformance-host-tests: 100
Multiply: host_x64/fidl_rust_conformance_tests: 100
Multiply: host_x64/fidl_cpp_conformance_tests: 100
Multiply: host_x64/fidl_hlcpp_conformance_tests: 100
Multiply: host_x64/fidl_llcpp_conformance_tests: 100
Multiply: host_x64/obj/src/tests/fidl/fidl_go_conformance/fidl_go_conformance_tests.sh: 100
Change-Id: I6930b0b110b567c5b26a2c8cc1dbc7a708461098
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/777907
Reviewed-by: Yifei Teng <yifeit@google.com>
Commit-Queue: Mitchell Kember <mkember@google.com>
8 files changed
tree: 468988c742b92c8e4c4e12d1b87353c8a950f4c2
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. products/
  7. scripts/
  8. sdk/
  9. src/
  10. third_party/
  11. tools/
  12. zircon/
  13. .clang-format
  14. .clang-tidy
  15. .editorconfig
  16. .git-blame-ignore-revs
  17. .gitattributes
  18. .gitignore
  19. .gitmodules
  20. .gn
  21. .style.yapf
  22. analysis_options.yaml
  23. AUTHORS
  24. BUILD.gn
  25. CODE_OF_CONDUCT.md
  26. CONTRIBUTING.md
  27. fuchsia.code-workspace
  28. LICENSE
  29. OWNERS
  30. PATENTS
  31. pyrightconfig.json
  32. README.md
  33. rustfmt.toml
README.md

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