}
}

func TestInvalidUserPassword(t *testing.T) {
	_, err := Parse("http://user^:passwo^******@****.***/")
	if got, wantsub := fmt.Sprint(err), "net/url: invalid userinfo"; !strings.Contains(got, wantsub) {
		t.Errorf("error = %q; want substring %q", got, wantsub)
	}
}

func TestRejectControlCharacters(t *testing.T) {
	tests := []string{
		"http://foo.com/?foo\nbar",
		"http\r://foo.com/",

	io.WriteString(f, data)

	f.Seek(0, 0)
	b := make([]byte, 5)

	n, err := f.ReadAt(b, -10)

	const wantsub = "negative offset"
	if !strings.Contains(fmt.Sprint(err), wantsub) || n != 0 {
		t.Errorf("ReadAt(-10) = %v, %v; want 0, ...%q...", n, err, wantsub)
	}
}

func TestWriteAt(t *testing.T) {
	t.Parallel()

	f := newFile("TestWriteAt", t)
	defer Remove(f.Name())

		if sel.Indirect() {
			direct = "->"
		}
		got := [2]string{
			sel.String(),
			fmt.Sprintf("%s%v", direct, sel.Index()),
		}
		want := wantOut[syntax]
		if want != got {
			t.Errorf("%s: got %q; want %q", syntax, got, want)
		}
		delete(wantOut, syntax)

		// We must explicitly assert properties of the
		// Signature's receiver since it doesn't participate
		// in Identical() or String().

		if sel.Indirect() {
			direct = "->"
		}
		got := [2]string{
			sel.String(),
			fmt.Sprintf("%s%v", direct, sel.Index()),
		}
		want := wantOut[segment]
		if want != got {
			t.Errorf("%s: got %q; want %q", segment, got, want)
		}
		delete(wantOut, segment)

		// We must explicitly assert properties of the
		// Signature's receiver since it doesn't participate
		// in Identical() or String().

	seen := make(map[loader.Sym]struct{})
	rval := make([]bool, len(want))
	wantm := make(map[string]int)
	for k, w := range want {
		wantm[w] = k
	}
	count := 0
	for _, s := range undefs {
		if _, ok := seen[s]; ok {
			continue
		}
		seen[s] = struct{}{}
		if k, ok := wantm[ctxt.loader.SymName(s)]; ok {
			rval[k] = true
			count++
			if count == len(want) {