sumdb/internal/tkv/tkvtest: add tester and in-memory implementation

This is part of a Go checksum database implementation.
Eventually the code will live outside golang.org/x/exp.

Although the expected implementation of tkv.Storage
is a real database or key-value store, it speeds testing
considerably to avoid needing a full-blown storage system
for writing tests. This CL adds tkvtest.Mem, a trivial in-memory
implementation of tkv.Storage, for testing.

This CL also adds a preliminary tester for tkv.Storage
implementations. It is used here for testing tkvtest.Mem
but can be used for testing other implementations as well.

Change-Id: Ib70bc25a7b519fa4b685f6ce4c91b3ed04e0aa30
Reviewed-on: https://go-review.googlesource.com/c/exp/+/161663
Reviewed-by: Filippo Valsorda <filippo@golang.org>
3 files changed
tree: 8d03233d6c896c7991bef09785af109f83766c9a
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. apidiff/
  10. cmd/
  11. codereview.cfg
  12. ebnf/
  13. ebnflint/
  14. errors/
  15. fsnotify/
  16. go.mod
  17. go.sum
  18. inotify/
  19. io/
  20. mmap/
  21. old/
  22. rand/
  23. shiny/
  24. shootout/
  25. sumdb/
  26. utf8string/
  27. winfsnotify/
README.md

exp

This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.