.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/unitchecker/unitchecker_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 // +build go1.12
   6
   7 package unitchecker_test
   8
   9 // This test depends on features such as
  10 // go vet's support for vetx files (1.11) and
  11 // the (*os.ProcessState).ExitCode method (1.12).
  12
  13 import (
  14         "flag"
  15         "os"
  16         "os/exec"
  17         "regexp"
  18         "runtime"
  19         "strings"
  20         "testing"
  21
  22         "golang.org/x/tools/go/analysis/passes/findcall"
  23         "golang.org/x/tools/go/analysis/passes/printf"
  24         "golang.org/x/tools/go/analysis/unitchecker"
  25         "golang.org/x/tools/go/packages/packagestest"
  26 )
  27
  28 func TestMain(m *testing.M) {
  29         if os.Getenv("UNITCHECKER_CHILD") == "1" {
  30                 // child process
  31                 main()
  32                 panic("unreachable")
  33         }
  34
  35         flag.Parse()
  36         os.Exit(m.Run())
  37 }
  38
  39 func main() {
  40         unitchecker.Main(
  41                 findcall.Analyzer,
  42                 printf.Analyzer,
  43         )
  44 }
  45
  46 // This is a very basic integration test of modular
  47 // analysis with facts using unitchecker under "go vet".
  48 // It fork/execs the main function above.
  49 func TestIntegration(t *testing.T) { packagestest.TestAll(t, testIntegration) }
  50 func testIntegration(t *testing.T, exporter packagestest.Exporter) {
  51         if runtime.GOOS != "linux" && runtime.GOOS != "darwin" {
  52                 t.Skipf("skipping fork/exec test on this platform")
  53         }
  54
  55         exported := packagestest.Export(t, exporter, []packagestest.Module{{
  56                 Name: "golang.org/fake",
  57                 Files: map[string]interface{}{
  58                         "a/a.go": `package a
  59
  60 func _() {
  61         MyFunc123()
  62 }
  63
  64 func MyFunc123() {}
  65 `,
  66                         "b/b.go": `package b
  67
  68 import "golang.org/fake/a"
  69
  70 func _() {
  71         a.MyFunc123()
  72         MyFunc123()
  73 }
  74
  75 func MyFunc123() {}
  76 `,
  77                 }}})
  78         defer exported.Cleanup()
  79
  80         const wantA = `# golang.org/fake/a
  81 ([/._\-a-zA-Z0-9]+[\\/]fake[\\/])?a/a.go:4:11: call of MyFunc123\(...\)
  82 `
  83         const wantB = `# golang.org/fake/b
  84 ([/._\-a-zA-Z0-9]+[\\/]fake[\\/])?b/b.go:6:13: call of MyFunc123\(...\)
  85 ([/._\-a-zA-Z0-9]+[\\/]fake[\\/])?b/b.go:7:11: call of MyFunc123\(...\)
  86 `
  87         const wantAJSON = `# golang.org/fake/a
  88 \{
  89         "golang.org/fake/a": \{
  90                 "findcall": \[
  91                         \{
  92                                 "posn": "([/._\-a-zA-Z0-9]+[\\/]fake[\\/])?a/a.go:4:11",
  93                                 "message": "call of MyFunc123\(...\)"
  94                         \}
  95                 \]
  96         \}
  97 \}
  98 `
  99
 100         for _, test := range []struct {
 101                 args     string
 102                 wantOut  string
 103                 wantExit int
 104         }{
 105                 {args: "golang.org/fake/a", wantOut: wantA, wantExit: 2},
 106                 {args: "golang.org/fake/b", wantOut: wantB, wantExit: 2},
 107                 {args: "golang.org/fake/a golang.org/fake/b", wantOut: wantA + wantB, wantExit: 2},
 108                 {args: "-json golang.org/fake/a", wantOut: wantAJSON, wantExit: 0},
 109                 {args: "-c=0 golang.org/fake/a", wantOut: wantA + "4            MyFunc123\\(\\)\n", wantExit: 2},
 110         } {
 111                 cmd := exec.Command("go", "vet", "-vettool="+os.Args[0], "-findcall.name=MyFunc123")
 112                 cmd.Args = append(cmd.Args, strings.Fields(test.args)...)
 113                 cmd.Env = append(exported.Config.Env, "UNITCHECKER_CHILD=1")
 114                 cmd.Dir = exported.Config.Dir
 115
 116                 out, err := cmd.CombinedOutput()
 117                 exitcode := 0
 118                 if exitErr, ok := err.(*exec.ExitError); ok {
 119                         exitcode = exitErr.ExitCode()
 120                 }
 121                 if exitcode != test.wantExit {
 122                         t.Errorf("%s: got exit code %d, want %d", test.args, exitcode, test.wantExit)
 123                 }
 124
 125                 matched, err := regexp.Match(test.wantOut, out)
 126                 if err != nil {
 127                         t.Fatal(err)
 128                 }
 129                 if !matched {
 130                         t.Errorf("%s: got <<%s>>, want match of regexp <<%s>>", test.args, out, test.wantOut)
 131                 }
 132         }
 133 }