eiri opened a new pull request #1273: Adopt fake_db to PSE changes URL: https://github.com/apache/couchdb/pull/1273 ## Overview With db headers moved into engine's state, any `fake_db` call that is trying to setup sequences for tests (e.g. in mem3_shards) crashing with context setup failed. It's not trivial to compose a proper `engine` field outside of couch app, so instead this fix makes `fake_db` to set engine transparently, unless it provided explicitly in a payload. ## Testing recommendations Without this change running `make eunit apps=mem3 suites=mem3_shards` would crash with ``` ... *** context setup failed *** **in function erlang:setelement/3 called as setelement(undefined,{db,1,<<"dbs">>,undefined, {couch_bt_engine,undefined}, nil,nil,undefined,undefined, {user_ctx,null,[],undefined}, [],undefined,nil,nil,...},0) in call from test_util:'-fake_db/1-fun-0-'/3 (src/test_util.erl, line 244) in call from lists:foldl/3 (lists.erl, line 1261) in call from mem3_shards:setup_changes/0 (src/mem3_shards.erl, line 738) **error:badarg [done in 1.194 s] ======================================================= Failed: 0. Skipped: 0. Passed: 10. ``` This was not exposed by travis because in eunit crash in context setup doesn't count as a failure. With this change the same command should pass successfully with `All 11 tests passed.` ## Checklist - [x] Code is written and works correctly; - [x] Changes are covered by tests; - [ ] Documentation reflects the changes;
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