mirror of
https://github.com/golang/go
synced 2024-09-30 18:18:32 -06:00
5cb1c80a83
Document a risk of generating invalid code due to shadowing between identifiers in code files and the imported package names. This risk was present before for any package with more than 1 .go file, but it's increased when some files have renamed imports (since they're typically used to resolve shadowing conflicts). Resolves TODO(adonovan): support renaming imports. Change-Id: Ie0e702345790fd2059c229623fb99fe645d688a4 Reviewed-on: https://go-review.googlesource.com/23785 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Alan Donovan <adonovan@google.com>
73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
// Copyright 2015 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 main
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import (
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"bytes"
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"io/ioutil"
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"os"
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"os/exec"
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"runtime"
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"testing"
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"golang.org/x/tools/go/buildutil"
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)
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func TestBundle(t *testing.T) {
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load := func(name string) string {
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data, err := ioutil.ReadFile(name)
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if err != nil {
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t.Fatal(err)
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}
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return string(data)
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}
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ctxt = buildutil.FakeContext(map[string]map[string]string{
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"initial": {
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"a.go": load("testdata/src/initial/a.go"),
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"b.go": load("testdata/src/initial/b.go"),
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"c.go": load("testdata/src/initial/c.go"),
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},
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"domain.name/importdecl": {
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"p.go": load("testdata/src/domain.name/importdecl/p.go"),
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},
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"fmt": {
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"print.go": `package fmt; func Println(...interface{})`,
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},
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})
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os.Args = os.Args[:1] // avoid e.g. -test=short in the output
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out, err := bundle("initial", "github.com/dest", "dest", "prefix")
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if err != nil {
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t.Fatal(err)
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}
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if got, want := string(out), load("testdata/out.golden"); got != want {
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t.Errorf("-- got --\n%s\n-- want --\n%s\n-- diff --", got, want)
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if err := ioutil.WriteFile("testdata/out.got", out, 0644); err != nil {
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t.Fatal(err)
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}
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t.Log(diff("testdata/out.golden", "testdata/out.got"))
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}
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}
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func diff(a, b string) string {
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var cmd *exec.Cmd
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switch runtime.GOOS {
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case "plan9":
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cmd = exec.Command("/bin/diff", "-c", a, b)
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default:
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cmd = exec.Command("/usr/bin/diff", "-u", a, b)
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}
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var out bytes.Buffer
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cmd.Stdout = &out
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cmd.Stderr = &out
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cmd.Run() // nonzero exit is expected
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if out.Len() == 0 {
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return "(failed to compute diff)"
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}
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return out.String()
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}
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