| // Copyright 2020 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package execabs |
| |
| import ( |
| "context" |
| "fmt" |
| "os" |
| "os/exec" |
| "path/filepath" |
| "runtime" |
| "strings" |
| "testing" |
| ) |
| |
| // hasExec reports whether the current system can start new processes |
| // using os.StartProcess or (more commonly) exec.Command. |
| // Copied from internal/testenv.HasExec |
| func hasExec() bool { |
| switch runtime.GOOS { |
| case "wasip1", "js", "ios": |
| return false |
| } |
| return true |
| } |
| |
| // mustHaveExec checks that the current system can start new processes |
| // using os.StartProcess or (more commonly) exec.Command. |
| // If not, mustHaveExec calls t.Skip with an explanation. |
| // Copied from internal/testenv.MustHaveExec |
| func mustHaveExec(t testing.TB) { |
| if !hasExec() { |
| t.Skipf("skipping test: cannot exec subprocess on %s/%s", runtime.GOOS, runtime.GOARCH) |
| } |
| } |
| |
| func TestFixCmd(t *testing.T) { |
| cmd := &exec.Cmd{Path: "hello"} |
| fixCmd("hello", cmd) |
| if cmd.Path != "" { |
| t.Errorf("fixCmd didn't clear cmd.Path") |
| } |
| expectedErr := fmt.Sprintf("hello resolves to executable in current directory (.%chello)", filepath.Separator) |
| if err := cmd.Run(); err == nil { |
| t.Fatal("Command.Run didn't fail") |
| } else if err.Error() != expectedErr { |
| t.Fatalf("Command.Run returned unexpected error: want %q, got %q", expectedErr, err.Error()) |
| } |
| } |
| |
| func TestCommand(t *testing.T) { |
| mustHaveExec(t) |
| |
| for _, cmd := range []func(string) *Cmd{ |
| func(s string) *Cmd { return Command(s) }, |
| func(s string) *Cmd { return CommandContext(context.Background(), s) }, |
| } { |
| tmpDir := t.TempDir() |
| executable := "execabs-test" |
| if runtime.GOOS == "windows" { |
| executable += ".exe" |
| } |
| if err := os.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil { |
| t.Fatal(err) |
| } |
| cwd, err := os.Getwd() |
| if err != nil { |
| t.Fatalf("os.Getwd failed: %s", err) |
| } |
| defer os.Chdir(cwd) |
| if err = os.Chdir(tmpDir); err != nil { |
| t.Fatalf("os.Chdir failed: %s", err) |
| } |
| if runtime.GOOS != "windows" { |
| // add "." to PATH so that exec.LookPath looks in the current directory on |
| // non-windows platforms as well |
| origPath := os.Getenv("PATH") |
| defer os.Setenv("PATH", origPath) |
| os.Setenv("PATH", fmt.Sprintf(".:%s", origPath)) |
| } |
| expectedErr := fmt.Sprintf("execabs-test resolves to executable in current directory (.%c%s)", filepath.Separator, executable) |
| if err = cmd("execabs-test").Run(); err == nil { |
| t.Fatalf("Command.Run didn't fail when exec.LookPath returned a relative path") |
| } else if err.Error() != expectedErr && !isGo119ErrDot(err) { |
| t.Errorf("Command.Run returned unexpected error: want %q, got %q", expectedErr, err.Error()) |
| } |
| } |
| } |
| |
| func TestLookPath(t *testing.T) { |
| mustHaveExec(t) |
| |
| tmpDir := t.TempDir() |
| executable := "execabs-test" |
| if runtime.GOOS == "windows" { |
| executable += ".exe" |
| } |
| if err := os.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil { |
| t.Fatal(err) |
| } |
| cwd, err := os.Getwd() |
| if err != nil { |
| t.Fatalf("os.Getwd failed: %s", err) |
| } |
| defer os.Chdir(cwd) |
| if err = os.Chdir(tmpDir); err != nil { |
| t.Fatalf("os.Chdir failed: %s", err) |
| } |
| if runtime.GOOS != "windows" { |
| // add "." to PATH so that exec.LookPath looks in the current directory on |
| // non-windows platforms as well |
| origPath := os.Getenv("PATH") |
| defer os.Setenv("PATH", origPath) |
| os.Setenv("PATH", fmt.Sprintf(".:%s", origPath)) |
| } |
| expectedErr := fmt.Sprintf("execabs-test resolves to executable in current directory (.%c%s)", filepath.Separator, executable) |
| if _, err := LookPath("execabs-test"); err == nil { |
| t.Fatalf("LookPath didn't fail when finding a non-relative path") |
| } else if err.Error() != expectedErr { |
| t.Errorf("LookPath returned unexpected error: want %q, got %q", expectedErr, err.Error()) |
| } |
| } |
| |
| // Issue #58606 |
| func TestDoesNotExist(t *testing.T) { |
| err := Command("this-executable-should-not-exist").Start() |
| if err == nil { |
| t.Fatal("command should have failed") |
| } |
| if strings.Contains(err.Error(), "resolves to executable in current directory") { |
| t.Errorf("error (%v) should not refer to current directory", err) |
| } |
| } |