.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/multichecker/multichecker_test.go

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