// Copyright 2019 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 cmdtest

import (
	"encoding/json"
	"testing"

	"golang.org/x/tools/internal/lsp/cmd"
	"golang.org/x/tools/internal/lsp/protocol"
	"golang.org/x/tools/internal/lsp/tests"
	"golang.org/x/tools/internal/span"
	"golang.org/x/tools/internal/tool"
)

func (r *runner) Link(t *testing.T, uri span.URI, wantLinks []tests.Link) {
	m, err := r.data.Mapper(uri)
	if err != nil {
		t.Fatal(err)
	}
	args := []string{"-remote=internal", "links", "-json", uri.Filename()}
	app := cmd.New("gopls-test", r.data.Config.Dir, r.data.Exported.Config.Env, r.options)
	out := CaptureStdOut(t, func() {
		_ = tool.Run(r.ctx, app, args)
	})
	var got []protocol.DocumentLink
	err = json.Unmarshal([]byte(out), &got)
	if err != nil {
		t.Fatal(err)
	}
	if diff := tests.DiffLinks(m, wantLinks, got); diff != "" {
		t.Error(diff)
	}
}