1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package types2
import (
"cmd/compile/internal/syntax"
"strings"
"testing"
)
func TestInvalidTypeSet(t *testing.T) {
if !invalidTypeSet.IsEmpty() {
t.Error("invalidTypeSet is not empty")
}
}
func TestTypeSetString(t *testing.T) {
for body, want := range map[string]string{
"{}": "𝓤",
"{int}": "{int}",
"{~int}": "{~int}",
"{int|string}": "{int ∪ string}",
"{int; string}": "∅",
"{comparable}": "{comparable}",
"{comparable; int}": "{comparable; int}",
"{~int; comparable}": "{comparable; ~int}",
"{int|string; comparable}": "{comparable; int ∪ string}",
"{comparable; int; string}": "∅",
"{m()}": "{func (p.T).m()}",
"{m1(); m2() int }": "{func (p.T).m1(); func (p.T).m2() int}",
"{error}": "{func (error).Error() string}",
"{m(); comparable}": "{comparable; func (p.T).m()}",
"{m1(); comparable; m2() int }": "{comparable; func (p.T).m1(); func (p.T).m2() int}",
"{comparable; error}": "{comparable; func (error).Error() string}",
"{m(); comparable; int|float32|string}": "{comparable; func (p.T).m(); int ∪ float32 ∪ string}",
"{m1(); int; m2(); comparable }": "{comparable; func (p.T).m1(); func (p.T).m2(); int}",
"{E}; type E interface{}": "𝓤",
"{E}; type E interface{int;string}": "∅",
"{E}; type E interface{comparable}": "{comparable}",
} {
// parse
errh := func(error) {} // dummy error handler so that parsing continues in presence of errors
src := "package p; type T interface" + body
file, err := syntax.Parse(nil, strings.NewReader(src), errh, nil, syntax.AllowGenerics)
if err != nil {
t.Fatalf("%s: %v (invalid test case)", body, err)
}
// type check
var conf Config
pkg, err := conf.Check(file.PkgName.Value, []*syntax.File{file}, nil)
if err != nil {
t.Fatalf("%s: %v (invalid test case)", body, err)
}
// lookup T
obj := pkg.scope.Lookup("T")
if obj == nil {
t.Fatalf("%s: T not found (invalid test case)", body)
}
T, ok := under(obj.Type()).(*Interface)
if !ok {
t.Fatalf("%s: %v is not an interface (invalid test case)", body, obj)
}
// verify test case
got := T.typeSet().String()
if got != want {
t.Errorf("%s: got %s; want %s", body, got, want)
}
}
}
// TODO(gri) add more tests
|
