mirror of https://github.com/golang/go.git
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cmd_test
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import (
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"bytes"
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"context"
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"flag"
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"io/ioutil"
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"path/filepath"
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"testing"
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"golang.org/x/tools/internal/lsp/cmd"
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"golang.org/x/tools/internal/testenv"
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"golang.org/x/tools/internal/tool"
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)
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//go:generate go test -run Help -update-help-files
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var updateHelpFiles = flag.Bool("update-help-files", false, "Write out the help files instead of checking them")
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const appName = "gopls"
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func TestHelpFiles(t *testing.T) {
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testenv.NeedsGoBuild(t) // This is a lie. We actually need the source code.
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app := cmd.New(appName, "", nil, nil)
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ctx := context.Background()
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for _, page := range append(app.Commands(), app) {
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t.Run(page.Name(), func(t *testing.T) {
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var buf bytes.Buffer
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s := flag.NewFlagSet(page.Name(), flag.ContinueOnError)
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s.SetOutput(&buf)
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tool.Run(ctx, s, page, []string{"-h"})
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name := page.Name()
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if name == appName {
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name = "usage"
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}
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helpFile := filepath.Join("usage", name+".hlp")
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got := buf.Bytes()
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if *updateHelpFiles {
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if err := ioutil.WriteFile(helpFile, got, 0666); err != nil {
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t.Errorf("Failed writing %v: %v", helpFile, err)
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}
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return
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}
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expect, err := ioutil.ReadFile(helpFile)
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switch {
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case err != nil:
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t.Errorf("Missing help file %q", helpFile)
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case !bytes.Equal(expect, got):
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t.Errorf("Help file %q did not match, got:\n%q\nwant:\n%q", helpFile, string(got), string(expect))
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}
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})
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}
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}
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