ilya-biryukov added inline comments.

================
Comment at: clang-tools-extra/clangd/unittests/TweakTesting.h:71
+  // Index to be passed into Tweak::Selection.
+  const SymbolIndex *Index = nullptr;
+
----------------
kadircet wrote:
> ilya-biryukov wrote:
> > How is this index populated? Each test has to mock it?
> that's what we usually do with the indexes in the rest of the testing 
> code.(see code completion tests for an example)
> 
> we might decide to have some defaults if there are a substantial amount of 
> tests making use of the same pattern, wdyt?
I see two potential problems:
- Lifetime of the index. Why not make this field a `unique_ptr<SymbolIndex>`? 
Client code wouldn't need to worry about keeping the stale pointer in the 
`Index` field when exiting...
- Ease of discovery for common patterns. Searching for a proper helper does not 
usually take a lot of time, but I somehow always forget what it is. Should we 
maybe add a comment mentioning a function that is commonly used for mocking 
index in tests. WDYT? 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D69165/new/

https://reviews.llvm.org/D69165



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