src/cmd/go/testdata/script/run_vendor.txt

# Run
cd vend/hello
go run hello.go
stdout 'hello, world'

-- vend/hello/hello.go --
package main

import (
	"fmt"
	"strings" // really ../vendor/strings
)

func main() {
	fmt.Printf("%s\n", strings.Msg)
}
-- vend/hello/hello_test.go --
package main

import (
	"strings" // really ../vendor/strings
	"testing"
)

func TestMsgInternal(t *testing.T) {
	if strings.Msg != "hello, world" {
		t.Fatalf("unexpected msg: %v", strings.Msg)
	}
}
-- vend/vendor/strings/msg.go --
package strings

var Msg = "hello, world"