github.com/mattn/go@v0.0.0-20171011075504-07f7db3ea99f/test/fixedbugs/issue14636.go (about)

     1  // +build !nacl,!android,!darwin darwin,!arm
     2  // run
     3  
     4  // Copyright 2016 The Go Authors. All rights reserved.
     5  // Use of this source code is governed by a BSD-style
     6  // license that can be found in the LICENSE file.
     7  
     8  package main
     9  
    10  import (
    11  	"bytes"
    12  	"log"
    13  	"os/exec"
    14  	"strings"
    15  )
    16  
    17  func main() {
    18  	checkLinkOutput("", "-B argument must start with 0x")
    19  	checkLinkOutput("0", "-B argument must start with 0x")
    20  	checkLinkOutput("0x", "usage")
    21  	checkLinkOutput("0x0", "-B argument must have even number of digits")
    22  	checkLinkOutput("0x00", "usage")
    23  	checkLinkOutput("0xYZ", "-B argument contains invalid hex digit")
    24  	checkLinkOutput("0x"+strings.Repeat("00", 32), "usage")
    25  	checkLinkOutput("0x"+strings.Repeat("00", 33), "-B option too long (max 32 digits)")
    26  }
    27  
    28  func checkLinkOutput(buildid string, message string) {
    29  	cmd := exec.Command("go", "tool", "link", "-B", buildid)
    30  	out, err := cmd.CombinedOutput()
    31  	if err == nil {
    32  		log.Fatalf("expected cmd/link to fail")
    33  	}
    34  
    35  	firstLine := string(bytes.SplitN(out, []byte("\n"), 2)[0])
    36  	if strings.HasPrefix(firstLine, "panic") {
    37  		log.Fatalf("cmd/link panicked:\n%s", out)
    38  	}
    39  
    40  	if !strings.Contains(firstLine, message) {
    41  		log.Fatalf("cmd/link output did not include expected message %q: %s", message, firstLine)
    42  	}
    43  }