.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.1-0.20210319172145-bda8f5cee399/go/analysis/multichecker/multichecker_test.go

   1 // Copyright 2018 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 //go:build go1.12
   6 // +build go1.12
   7
   8 package multichecker_test
   9
  10 import (
  11         "fmt"
  12         "os"
  13         "os/exec"
  14         "runtime"
  15         "testing"
  16
  17         "golang.org/x/tools/go/analysis"
  18         "golang.org/x/tools/go/analysis/multichecker"
  19         "golang.org/x/tools/go/analysis/passes/findcall"
  20         "golang.org/x/tools/internal/testenv"
  21 )
  22
  23 func main() {
  24         fail := &analysis.Analyzer{
  25                 Name: "fail",
  26                 Doc:  "always fail on a package 'sort'",
  27                 Run: func(pass *analysis.Pass) (interface{}, error) {
  28                         if pass.Pkg.Path() == "sort" {
  29                                 return nil, fmt.Errorf("failed")
  30                         }
  31                         return nil, nil
  32                 },
  33         }
  34         multichecker.Main(findcall.Analyzer, fail)
  35 }
  36
  37 // TestExitCode ensures that analysis failures are reported correctly.
  38 // This test fork/execs the main function above.
  39 func TestExitCode(t *testing.T) {
  40         if runtime.GOOS != "linux" {
  41                 t.Skipf("skipping fork/exec test on this platform")
  42         }
  43
  44         if os.Getenv("MULTICHECKER_CHILD") == "1" {
  45                 // child process
  46
  47                 // replace [progname -test.run=TestExitCode -- ...]
  48                 //      by [progname ...]
  49                 os.Args = os.Args[2:]
  50                 os.Args[0] = "vet"
  51                 main()
  52                 panic("unreachable")
  53         }
  54
  55         testenv.NeedsTool(t, "go")
  56
  57         for _, test := range []struct {
  58                 args []string
  59                 want int
  60         }{
  61                 {[]string{"nosuchdir/..."}, 1},                      // matched no packages
  62                 {[]string{"nosuchpkg"}, 1},                          // matched no packages
  63                 {[]string{"-unknownflag"}, 2},                       // flag error
  64                 {[]string{"-findcall.name=panic", "io"}, 3},         // finds diagnostics
  65                 {[]string{"-findcall=0", "io"}, 0},                  // no checkers
  66                 {[]string{"-findcall.name=nosuchfunc", "io"}, 0},    // no diagnostics
  67                 {[]string{"-findcall.name=panic", "sort", "io"}, 1}, // 'fail' failed on 'sort'
  68
  69                 // -json: exits zero even in face of diagnostics or package errors.
  70                 {[]string{"-findcall.name=panic", "-json", "io"}, 0},
  71                 {[]string{"-findcall.name=panic", "-json", "io"}, 0},
  72                 {[]string{"-findcall.name=panic", "-json", "sort", "io"}, 0},
  73         } {
  74                 args := []string{"-test.run=TestExitCode", "--"}
  75                 args = append(args, test.args...)
  76                 cmd := exec.Command(os.Args[0], args...)
  77                 cmd.Env = append(os.Environ(), "MULTICHECKER_CHILD=1")
  78                 out, err := cmd.CombinedOutput()
  79                 if len(out) > 0 {
  80                         t.Logf("%s: out=<<%s>>", test.args, out)
  81                 }
  82                 var exitcode int
  83                 if err, ok := err.(*exec.ExitError); ok {
  84                         exitcode = err.ExitCode() // requires go1.12
  85                 }
  86                 if exitcode != test.want {
  87                         t.Errorf("%s: exited %d, want %d", test.args, exitcode, test.want)
  88                 }
  89         }
  90 }