--- /dev/null
+// 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 (
+ "fmt"
+ "testing"
+
+ "golang.org/x/tools/internal/lsp/cmd"
+ "golang.org/x/tools/internal/lsp/protocol"
+ "golang.org/x/tools/internal/lsp/source"
+ "golang.org/x/tools/internal/span"
+)
+
+func (r *runner) PrepareRename(t *testing.T, src span.Span, want *source.PrepareItem) {
+ m, err := r.data.Mapper(src.URI())
+ if err != nil {
+ t.Errorf("prepare_rename failed: %v", err)
+ }
+
+ var (
+ target = fmt.Sprintf("%v", src)
+ args = []string{"prepare_rename", target}
+ stdOut, stdErr = r.NormalizeGoplsCmd(t, args...)
+ expect string
+ )
+
+ if want.Text == "" {
+ if stdErr != "" && stdErr != cmd.ErrInvalidRenamePosition.Error() {
+ t.Errorf("prepare_rename failed for %s,\nexpected:\n`%v`\ngot:\n`%v`", target, expect, stdErr)
+ }
+ return
+ }
+
+ ws, err := m.Span(protocol.Location{Range: want.Range})
+ if err != nil {
+ t.Errorf("prepare_rename failed: %v", err)
+ }
+
+ expect = r.Normalize(fmt.Sprintln(ws))
+ if expect != stdOut {
+ t.Errorf("prepare_rename failed for %s expected:\n`%s`\ngot:\n`%s`\n", target, expect, stdOut)
+ }
+}