Dear Gophers,
I'm struggling with "go test -coverpkg=XXX ... ./... -args
-test.gocoverdir" returning non-zero exit codes, albeit all tests are
passing. It might well be that I'm not really yet understanding how "go
test -coverpkg=" is supposed to work. As illustrated below, I don't want to
-coverpkg *all* packages "./..." in my module, but instead all *but one*.
First, I'm using go version go1.22.1 linux/amd64. The same happens for
go1.22.0, too.
Now, my repo in a minimized example might look like the following --
unfortunately, I don't see how I can make a useful playground example with
the required specific "go test" invocation.
- github.com/example/foo
- bar -- contains tests
- baz -- contains tests
- foobaz -- no tests
Following is preparing the list of packages to cover, with the exclusion(s):
GOCOVERTMPDIR="$(mktemp -d)"
trap 'rm -rf -- "$GOCOVERTMPDIR"' EXIT
IGNORE_PKGS=("github.com/example/foobaz")
FILTER_PATTERN="$(printf '^%s$|' "${IGNORE_PKGS[@]}" | sed 's/|$//')"
PACKAGE_LIST=$(go list ./... | grep -v -E "${FILTER_PATTERN}" | tr '\n' ','
| sed 's/,$//')
go test -coverpkg="${PACKAGE_LIST}" -v -tags=matchers -p=1 -count=1 -race \
./... -args -test.gocoverdir="$GOCOVERTMPDIR"
This runs all available tests including testable examples with success, but
exits with code 1.
Running the same tests with -coverpkg=./... succeeds.
What am I doing wrong? Or might this be an issue?
*Nota bene:* *why do I want to exclude a package from the coverage? Because
that is a trimmed-down package (as permitted by its license) following
CalVer(!) and having no go.mod, with otherwise large number of unnecessary
dependencies in my particular case. It changes the coverage considerably,
distracting from the coverage of my own code.*
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