包测试的串行执行

Question

I have implemented several packages for a web API, each with their own test cases. When each package is tested using go test ./api/pkgname the tests pass. If I want to run all tests at once with go test ./api/... test cases always fail.

In each test case, I recreate the entire schema using DROP SCHEMA public CASCADE followed by CREATE SCHEMA public and apply all migrations. The test suite reports errors back at random, saying a relation/table does not exist, so I guess each test suite (per package) is run in parallel somehow, thus messing up the DB state.

I tried to pass along some test flags like go test -cpu 1 -parallel 0 ./src/api/... with no success.

Could the problem here be tests running in parallel, and if yes, how can I force serial execution?

Update:

Currently I use this workaround to run the tests, but I still wonder if there's a better solution

find <dir> -type d -exec go test {} \;

Answer 1

As others have pointed out, -parallel doesn't do the job (it only works within packages). However, you can use the flag -p=1 to run through the package tests in series. This is documented here:

http://golang.org/src/cmd/go/testflag.go

but (afaict) not on the command line, go help, etc. I'm not sure it is meant to stick around (although I'd argue that if it is removed, -parallel should be fixed.)