Function TestFromEnvironmentUsing

proxy/proxy_test.go:127–145

Check that FromEnvironmentUsing uses our dialer.

(t *testing.T)

// Check that FromEnvironmentUsing uses our dialer.
func TestFromEnvironmentUsing(t *testing.T) {
	ResetProxyEnv()
	errFoo := errors.New("some error to check our dialer was used)")
	type key string
	ctx := context.WithValue(context.Background(), key("foo"), "bar")
	dialer := FromEnvironmentUsing(funcFailDialer(func(ctx context.Context) error {
		if got := ctx.Value(key("foo")); got != "bar" {
			t.Errorf("Resolver context = %T %v, want %q", got, got, "bar")
		}
		return errFoo
	}))
	_, err := dialer.(ContextDialer).DialContext(ctx, "tcp", "foo.tld:123")
	if err == nil {
		t.Fatalf("unexpected success")
	}
	if !strings.Contains(err.Error(), errFoo.Error()) {
		t.Errorf("got unexpected error %q; want substr %q", err, errFoo)
	}
}

func ResetProxyEnv() {
	for _, env := range []*envOnce{allProxyEnv, noProxyEnv} {