| 1 | // Copyright 2016 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package typeutil_test |
| 6 | |
| 7 | import ( |
| 8 | "fmt" |
| 9 | "go/ast" |
| 10 | "go/parser" |
| 11 | "go/token" |
| 12 | "go/types" |
| 13 | "strings" |
| 14 | "testing" |
| 15 | |
| 16 | "golang.org/x/tools/go/types/typeutil" |
| 17 | ) |
| 18 | |
| 19 | func TestIntuitiveMethodSet(t *testing.T) { |
| 20 | const source = ` |
| 21 | package P |
| 22 | type A int |
| 23 | func (A) f() |
| 24 | func (*A) g() |
| 25 | ` |
| 26 | |
| 27 | fset := token.NewFileSet() |
| 28 | f, err := parser.ParseFile(fset, "hello.go", source, 0) |
| 29 | if err != nil { |
| 30 | t.Fatal(err) |
| 31 | } |
| 32 | |
| 33 | var conf types.Config |
| 34 | pkg, err := conf.Check("P", fset, []*ast.File{f}, nil) |
| 35 | if err != nil { |
| 36 | t.Fatal(err) |
| 37 | } |
| 38 | qual := types.RelativeTo(pkg) |
| 39 | |
| 40 | for _, test := range []struct { |
| 41 | expr string // type expression |
| 42 | want string // intuitive method set |
| 43 | }{ |
| 44 | {"A", "(A).f (*A).g"}, |
| 45 | {"*A", "(*A).f (*A).g"}, |
| 46 | {"error", "(error).Error"}, |
| 47 | {"*error", ""}, |
| 48 | {"struct{A}", "(struct{A}).f (*struct{A}).g"}, |
| 49 | {"*struct{A}", "(*struct{A}).f (*struct{A}).g"}, |
| 50 | } { |
| 51 | tv, err := types.Eval(fset, pkg, 0, test.expr) |
| 52 | if err != nil { |
| 53 | t.Errorf("Eval(%s) failed: %v", test.expr, err) |
| 54 | } |
| 55 | var names []string |
| 56 | for _, m := range typeutil.IntuitiveMethodSet(tv.Type, nil) { |
| 57 | name := fmt.Sprintf("(%s).%s", types.TypeString(m.Recv(), qual), m.Obj().Name()) |
| 58 | names = append(names, name) |
| 59 | } |
| 60 | got := strings.Join(names, " ") |
| 61 | if got != test.want { |
| 62 | t.Errorf("IntuitiveMethodSet(%s) = %q, want %q", test.expr, got, test.want) |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 |
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