1 // run 2 3 // Copyright 2017 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // As of "Mon 6 Nov 2017", run.go doesn't yet have proper 8 // column matching so instead match the output manually 9 // by exec-ing 10 11 package main 12 13 import ( 14 "fmt" 15 "io/ioutil" 16 "log" 17 "os" 18 "os/exec" 19 "runtime" 20 "strings" 21 ) 22 23 func main() { 24 if runtime.Compiler != "gc" || runtime.GOOS == "nacl" { 25 return 26 } 27 28 f, err := ioutil.TempFile("", "issue21317.go") 29 if err != nil { 30 log.Fatal(err) 31 } 32 fmt.Fprintf(f, ` 33 package main 34 35 import "fmt" 36 37 func main() { 38 n, err := fmt.Println(1) 39 } 40 `) 41 f.Close() 42 defer os.RemoveAll(f.Name()) 43 44 // compile and test output 45 cmd := exec.Command("go", "tool", "compile", f.Name()) 46 out, err := cmd.CombinedOutput() 47 if err == nil { 48 log.Fatalf("expected cmd/compile to fail") 49 } 50 wantErrs := []string{ 51 "7:9: n declared and not used", 52 "7:12: err declared and not used", 53 } 54 outStr := string(out) 55 for _, want := range wantErrs { 56 if !strings.Contains(outStr, want) { 57 log.Fatalf("failed to match %q\noutput: %q", want, outStr) 58 } 59 } 60 } 61
