| // Copyright 2020 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 misc |
| |
| import ( |
| "testing" |
| |
| . "golang.org/x/tools/internal/lsp/regtest" |
| ) |
| |
| func TestStdlibReferences(t *testing.T) { |
| const files = ` |
| -- go.mod -- |
| module mod.com |
| |
| go 1.12 |
| -- main.go -- |
| package main |
| |
| import "fmt" |
| |
| func main() { |
| fmt.Print() |
| } |
| ` |
| |
| Run(t, files, func(t *testing.T, env *Env) { |
| env.OpenFile("main.go") |
| file, pos := env.GoToDefinition("main.go", env.RegexpSearch("main.go", `fmt.(Print)`)) |
| refs, err := env.Editor.References(env.Ctx, file, pos) |
| if err != nil { |
| t.Fatal(err) |
| } |
| if len(refs) != 2 { |
| t.Fatalf("got %v reference(s), want 2", len(refs)) |
| } |
| // The first reference is guaranteed to be the definition. |
| if got, want := refs[1].URI, env.Sandbox.Workdir.URI("main.go"); got != want { |
| t.Errorf("found reference in %v, wanted %v", got, want) |
| } |
| }) |
| } |
| |
| // This reproduces and tests golang/go#48400. |
| func TestReferencesPanicOnError(t *testing.T) { |
| const files = ` |
| -- go.mod -- |
| module mod.com |
| |
| go 1.12 |
| -- main.go -- |
| package main |
| |
| type t interface { |
| error |
| } |
| |
| type s struct{} |
| |
| func (*s) Error() string { |
| return "" |
| } |
| |
| func _() { |
| var s s |
| _ = s.Error() |
| } |
| ` |
| Run(t, files, func(t *testing.T, env *Env) { |
| env.OpenFile("main.go") |
| file, pos := env.GoToDefinition("main.go", env.RegexpSearch("main.go", `Error`)) |
| refs, err := env.Editor.References(env.Ctx, file, pos) |
| if err == nil { |
| t.Fatalf("expected error for references, instead got %v", refs) |
| } |
| wantErr := "no position for func (error).Error() string" |
| if err.Error() != wantErr { |
| t.Fatalf("expected error with message %s, instead got %s", wantErr, err.Error()) |
| } |
| }) |
| } |