Why is goapp test is looking for files in /tmp? - google-app-engine

Question

I'm trying to get tests working on my local dev machine Cloud SDK version is: 159.0.0
Everything I've read says that I should no change GOROOT so I'm not sure how to fix this.
$ /Users/bryan/google-cloud-sdk/platform/google_appengine/goroot/bin/goapp test
go: cannot find GOROOT directory: /tmp/go_sdk887571938/appengine/go_appengine/goroot
bryan#Bryans-MacBook Thu Jun 15 10:22:37 ~/go/src/skincarereview
$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/bryan/go/"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GO15VENDOREXPERIMENT="1"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fno-common"
CXX="clang++"
CGO_ENABLED="1"
bryan#Bryans-MacBook Thu Jun 15 10:22:57 ~/go/src/skincarereview
$ ls ~/google-cloud-sdk
total 408
drwxr-xr-x 30 bryan staff 1020 Jun 14 20:31 .install
-rw-r--r-- 1 bryan staff 980 Jun 14 20:30 LICENSE
-rw-r--r-- 1 bryan staff 673 Jun 14 20:30 README
-rw-r--r-- 1 bryan staff 162673 Jun 14 20:30 RELEASE_NOTES
-rw-r--r-- 1 bryan staff 8 Jun 14 20:30 VERSION
drwxr-xr-x 10 bryan staff 340 Jun 14 20:30 bin
-rw-r--r-- 1 bryan staff 2734 Jun 14 20:30 completion.bash.inc
-rw-r--r-- 1 bryan staff 2083 Jun 14 20:30 completion.zsh.inc
drwxr-xr-x 3 bryan staff 102 Jun 14 20:30 help
-rwxr-xr-x 1 bryan staff 1581 Jun 14 20:30 install.bat
-rwxr-xr-x 1 bryan staff 3471 Jun 14 20:30 install.sh
drwxr-xr-x 10 bryan staff 340 Jun 14 20:30 lib
-rw-r--r-- 1 bryan staff 308 Jun 14 20:30 path.bash.inc
-rw-r--r-- 1 bryan staff 1210 Jun 14 20:30 path.fish.inc
-rw-r--r-- 1 bryan staff 31 Jun 14 20:30 path.zsh.inc
drwxr-xr-x 6 bryan staff 204 Jun 14 20:30 platform
-rw-r--r-- 1 bryan staff 40 Jun 14 20:30 properties
bryan#Bryans-MacBook Thu Jun 15 10:24:22 ~/go/src/skincarereview
$ find / -name goroot 2>/dev/null
/Users/bryan/google-cloud-sdk/platform/google_appengine/goroot
bryan#Bryans-MacBook Thu Jun 15 10:28:43 ~/go/src/skincarereview
$ echo $PATH
/Users/bryan/google-cloud-sdk/bin:/Users/bryan/go/src/:/Users/bryan/google-cloud-sdk/platform/google_appengine/goroot/bin/:/Users/bryan/google-cloud-sdk/bin/:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin
Looking at main.go line 155, where I think the error is being thrown, I don't see where "goroot" is being set .
if fi, err := os.Stat(goroot); err != nil || !fi.IsDir() {
fmt.Fprintf(os.Stderr, "go: cannot find GOROOT directory: %v\n", goroot)
os.Exit(2)
}

Answer 1

You can try and follow the recommendation of this answer:
If your install is messed up beyond reason (happened to me once), just remove the cloud SDK and any references to it in your $PATH. Also completely uninstall the regular Go installation.
Then start from scratch. Install Go, unpack google-cloud-sdk, run installer (add to $PATH if needed), gcloud components install app-engine-go.
Voila.
As mentioned in that same answer, you don't set GOROOT anywhere, it is set for you.

Answer 2

You might want to read up on how go run/test works. The program basically builds into a temporary location and then runs, so that might be why it's complaining about your goroot.
This question could possibly help you: Golang: tests and working directory

Answer 3

I believe you are calling wrong goapp. You should be calling one that is directly in google_appengine folder as follows:
/Users/bryan/google-cloud-sdk/platform/google_appengine/goapp test
If you don't have goapp in google_appengine for some reason, I'll be quite surprised, but then following should work too. (Still the above is the correct way of calling it. goapp resolves appengine's goroot as a relative path from it's own location, so it's important where goapp itself is located.)
GOROOT=/Users/bryan/google-cloud-sdk/platform/google_appengine/goroot /Users/bryan/google-cloud-sdk/platform/google_appengine/goapp test