.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/internal/analysisflags/flags_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 package analysisflags_test
   6
   7 import (
   8         "fmt"
   9         "os"
  10         "os/exec"
  11         "runtime"
  12         "strings"
  13         "testing"
  14
  15         "golang.org/x/tools/go/analysis"
  16         "golang.org/x/tools/go/analysis/internal/analysisflags"
  17 )
  18
  19 func main() {
  20         fmt.Println(analysisflags.Parse([]*analysis.Analyzer{
  21                 {Name: "a1", Doc: "a1"},
  22                 {Name: "a2", Doc: "a2"},
  23                 {Name: "a3", Doc: "a3"},
  24         }, true))
  25         os.Exit(0)
  26 }
  27
  28 // This test fork/execs the main function above.
  29 func TestExec(t *testing.T) {
  30         if runtime.GOOS != "linux" {
  31                 t.Skipf("skipping fork/exec test on this platform")
  32         }
  33
  34         progname := os.Args[0]
  35
  36         if os.Getenv("ANALYSISFLAGS_CHILD") == "1" {
  37                 // child process
  38                 os.Args = strings.Fields(progname + " " + os.Getenv("FLAGS"))
  39                 main()
  40                 panic("unreachable")
  41         }
  42
  43         for _, test := range []struct {
  44                 flags string
  45                 want  string
  46         }{
  47                 {"", "[a1 a2 a3]"},
  48                 {"-a1=0", "[a2 a3]"},
  49                 {"-a1=1", "[a1]"},
  50                 {"-a1", "[a1]"},
  51                 {"-a1=1 -a3=1", "[a1 a3]"},
  52                 {"-a1=1 -a3=0", "[a1]"},
  53         } {
  54                 cmd := exec.Command(progname, "-test.run=TestExec")
  55                 cmd.Env = append(os.Environ(), "ANALYSISFLAGS_CHILD=1", "FLAGS="+test.flags)
  56
  57                 output, err := cmd.CombinedOutput()
  58                 if err != nil {
  59                         t.Fatalf("exec failed: %v; output=<<%s>>", err, output)
  60                 }
  61
  62                 got := strings.TrimSpace(string(output))
  63                 if got != test.want {
  64                         t.Errorf("got %s, want %s", got, test.want)
  65                 }
  66         }
  67 }