// 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/gopls/internal/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)
		}
	})
}