去建设工程，但不能测试

Below is my project structure:

/user/home/go/src/github.com/my_go_proj
                                       /main.go
                                       /mypackage
                                                 /service.go
                                                 /service_test.go

GOPATH points to /user/home/go
cd /user/home/go/src/github.com/my_go_proj
go build ---> This works and creates the `my_go_proj` executable.
go test
?       github.com/my_go_proj   [no test files]
go test github.com/my_go_proj/mypackage
go build gopkg.in/tomb.v2: no buildable Go source files in 
FAIL    github.com/my_go_proj/mypackage [build failed]

go test ./...
?       github.com/my_go_proj   [no test files]
go build gopkg.in/tomb.v2: no buildable Go source files in 
FAIL    github.com/my_go_proj/mypackage [build failed]

How do I run go test to run the service_test.go test inside mypackage?

Update: updated the behaviour for go test ./...

The problem was with the directory structure. My project source should be in $GOPATH. But it was inside $GOPATH/src.

Incorrect /user/home/go/src/github.com/my_go_proj
Correct /user/home/go/github.com/my_go_proj

To test all subdirectories use:

$ go test ./...

From the Relative import paths section of the Command go documentation:

Relative patterns are also allowed, like go test ./... to test all subdirectories. See 'go help packages' for details on the pattern syntax.