1# In GOPATH mode, vendored packages can replace std packages.
2env GO111MODULE=off
3cd vend/hello
4go test -v
5stdout TestMsgInternal
6stdout TestMsgExternal
7
8# In module mode, they cannot.
9env GO111MODULE=on
10! go test -mod=vendor
11stderr 'undefined: strings.Msg'
12
13-- vend/hello/go.mod --
14module vend/hello
15
16go 1.16
17-- vend/hello/hello.go --
18package main
19
20import (
21 "fmt"
22 "strings" // really ../vendor/strings
23)
24
25func main() {
26 fmt.Printf("%s\n", strings.Msg)
27}
28-- vend/hello/hello_test.go --
29package main
30
31import (
32 "strings" // really ../vendor/strings
33 "testing"
34)
35
36func TestMsgInternal(t *testing.T) {
37 if strings.Msg != "hello, world" {
38 t.Fatalf("unexpected msg: %v", strings.Msg)
39 }
40}
41-- vend/hello/hellox_test.go --
42package main_test
43
44import (
45 "strings" // really ../vendor/strings
46 "testing"
47)
48
49func TestMsgExternal(t *testing.T) {
50 if strings.Msg != "hello, world" {
51 t.Fatalf("unexpected msg: %v", strings.Msg)
52 }
53}
54-- vend/vendor/strings/msg.go --
55package strings
56
57var Msg = "hello, world"
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