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https://github.com/golang/go
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e861c3e003
Follow-up on https://golang.org/cl/124595; no semantic changes. Updates #26411. Change-Id: Ic1c4622dbf79529ff61530f9c25ec742c2abe5ca Reviewed-on: https://go-review.googlesource.com/c/142720 Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
93 lines
1.9 KiB
Go
93 lines
1.9 KiB
Go
// +build !nacl,!js
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// run
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// Copyright 2018 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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// Ensure that label redefinition errors print out
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// a column number that matches the start of the current label's
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// definition instead of the label delimiting token ":"
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package main
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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)
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func main() {
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tmpdir, err := ioutil.TempDir("", "issue26411")
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if err != nil {
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log.Fatalf("Failed to create temporary directory: %v", err)
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}
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defer os.RemoveAll(tmpdir)
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tests := []struct {
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code string
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errors []string
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}{
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{
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code: `
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package main
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func main() {
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foo:
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foo:
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}
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`,
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errors: []string{
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"^.+:5:1: label foo defined and not used\n",
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".+:6:1: label foo already defined at .+:5:1\n$",
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},
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},
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{
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code: `
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package main
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func main() {
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bar:
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bar:
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bar:
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bar :
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}
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`,
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errors: []string{
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"^.+:6:13: label bar defined and not used\n",
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".+:7:4: label bar already defined at .+:6:13\n",
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".+:8:1: label bar already defined at .+:6:13\n",
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".+:9:1: label bar already defined at .+:6:13\n$",
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},
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},
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}
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for i, test := range tests {
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filename := filepath.Join(tmpdir, fmt.Sprintf("%d.go", i))
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if err := ioutil.WriteFile(filename, []byte(test.code), 0644); err != nil {
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log.Printf("#%d: failed to create file %s", i, filename)
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continue
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}
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output, _ := exec.Command("go", "tool", "compile", filename).CombinedOutput()
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// remove each matching error from the output
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for _, err := range test.errors {
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rx := regexp.MustCompile(err)
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match := rx.Find(output)
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output = bytes.Replace(output, match, nil, 1) // remove match (which might be nil) from output
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}
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// at this point all output should have been consumed
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if len(output) != 0 {
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log.Printf("Test case %d has unmatched errors:\n%s", i, output)
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}
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}
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}
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