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// Copyright 2019 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 testgodefs
import (
"bytes"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
)
// We are testing cgo -godefs, which translates Go files that use
// import "C" into Go files with Go definitions of types defined in the
// import "C" block. Add more tests here.
var filePrefixes = []string{
"anonunion",
"bitfields",
"issue8478",
"fieldtypedef",
"issue37479",
"issue37621",
"issue38649",
"issue39534",
"issue48396",
}
func TestGoDefs(t *testing.T) {
testdata, err := filepath.Abs("testdata")
if err != nil {
t.Fatal(err)
}
gopath, err := os.MkdirTemp("", "testgodefs-gopath")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(gopath)
dir := filepath.Join(gopath, "src", "testgodefs")
if err := os.MkdirAll(dir, 0755); err != nil {
t.Fatal(err)
}
for _, fp := range filePrefixes {
cmd := exec.Command("go", "tool", "cgo",
"-godefs",
"-srcdir", testdata,
"-objdir", dir,
fp+".go")
cmd.Stderr = new(bytes.Buffer)
out, err := cmd.Output()
if err != nil {
t.Fatalf("%s: %v\n%s", strings.Join(cmd.Args, " "), err, cmd.Stderr)
}
fn := fp + "_defs.go"
if err := os.WriteFile(filepath.Join(dir, fn), out, 0644); err != nil {
t.Fatal(err)
}
// Verify that command line arguments are not rewritten in the generated comment,
// see go.dev/issue/52063
hasGeneratedByComment := false
for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
cgoExe := "cgo"
if runtime.GOOS == "windows" {
cgoExe = "cgo.exe"
}
if !strings.HasPrefix(line, "// "+cgoExe+" -godefs") {
continue
}
if want := "// " + cgoExe + " " + strings.Join(cmd.Args[3:], " "); line != want {
t.Errorf("%s: got generated comment %q, want %q", fn, line, want)
}
hasGeneratedByComment = true
break
}
if !hasGeneratedByComment {
t.Errorf("%s: comment with generating cgo -godefs command not found", fn)
}
}
main, err := os.ReadFile(filepath.Join("testdata", "main.go"))
if err != nil {
t.Fatal(err)
}
if err := os.WriteFile(filepath.Join(dir, "main.go"), main, 0644); err != nil {
t.Fatal(err)
}
if err := os.WriteFile(filepath.Join(dir, "go.mod"), []byte("module testgodefs\ngo 1.14\n"), 0644); err != nil {
t.Fatal(err)
}
// Use 'go run' to build and run the resulting binary in a single step,
// instead of invoking 'go build' and the resulting binary separately, so that
// this test can pass on mobile builders, which do not copy artifacts back
// from remote invocations.
cmd := exec.Command("go", "run", ".")
cmd.Env = append(os.Environ(), "GOPATH="+gopath)
cmd.Dir = dir
if out, err := cmd.CombinedOutput(); err != nil {
t.Fatalf("%s [%s]: %v\n%s", strings.Join(cmd.Args, " "), dir, err, out)
}
}
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