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pcre_test.go
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pcre_test.go
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// +build !windows
package libpcre
import (
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"path/filepath"
"runtime"
"strings"
"testing"
)
// TestPcre tests the transpiled libpcre using the transpiled pcretest program from the original pcre library.
// The files are copied into a temp directory.
// All .go files are changed to have package main, then pcretest is build.
// Finally RunTest is used to run the tests.
func TestPcre(t *testing.T) {
tempDir, err := ioutil.TempDir("", "pcre-test")
if err != nil {
t.Errorf("Cannot create temp folder: %v", err)
return
}
defer func() { // clean up
err := os.RemoveAll(tempDir)
if err != nil {
t.Errorf("Cannot cleanup: %v", err)
}
}()
srcDir := filepath.Clean("./")
err = CopyDir(srcDir, tempDir, getShouldCopyFunc(srcDir))
if err != nil {
t.Errorf("Cannot copy to temp folder: %v", err)
return
}
err = changeGoPackage2Main(tempDir)
if err != nil {
t.Errorf("Cannot change Go package to main: %v", err)
return
}
err = goBuildPcretest(srcDir, tempDir)
if err != nil {
t.Errorf("Cannot build pcretest: %v", err)
return
}
err = runPcreTest(t, srcDir)
if err != nil {
t.Errorf("Cannot run tests: %v", err)
return
}
}
func changeGoPackage2Main(tmpDir string) error {
files, err := ioutil.ReadDir(tmpDir)
if err != nil {
return err
}
for _, f := range files {
if f.IsDir() {
continue
}
if ext := path.Ext(f.Name()); ext != ".go" {
continue
}
input, err := ioutil.ReadFile(filepath.Join(tmpDir, f.Name()))
if err != nil {
return err
}
lines := strings.Split(string(input), "\n")
for i, line := range lines {
if strings.Contains(line, "package libpcre") {
lines[i] = "package main"
break
}
}
output := strings.Join(lines, "\n")
err = ioutil.WriteFile(filepath.Join(tmpDir, f.Name()), []byte(output), 0644)
if err != nil {
return err
}
}
return nil
}
func goBuildPcretest(srcDir string, tmpDir string) error {
args := []string{"build", "-tags", "pcretest", "pcretest.go", "libpcre.go", "api.go", "pcre_constants.go", "pcre_added.go", "pcretest_added.go"}
if runtime.GOOS == "linux" {
args = append(args, "pcretest_added_linux.go")
} else if runtime.GOOS == "darwin" {
args = append(args, "pcretest_added_darwin.go")
} else if runtime.GOOS == "windows" {
args = append(args, "pcretest_added_windows.go")
}
cmd := exec.Command("go", args...)
cmd.Dir = tmpDir
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
return err
}
return CopyFile(filepath.Join(tmpDir, "pcretest"), filepath.Join(srcDir, "pcretest"))
}
func runPcreTest(t *testing.T, srcDir string) error {
// TODO: fix errors in other tests:
// 2, 5, 7, 8, 14, 16 printf formatting handling (in c2go)
// 3, 15 fix locale error
args := strings.Split("1 4 6 9 10 11 12 13 17 18 19 20 21 22 23 24 25 26", " ")
cmd := exec.Command("./RunTest", args...)
cmd.Dir = srcDir
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err == nil {
return nil
}
if ex, ok := err.(*exec.ExitError); ok {
t.Errorf("Failed test: %v", ex)
return nil
}
return err
}
// ShouldCopy functions return whether this file/directory should be copied.
type ShouldCopy func(src string, info os.FileInfo) bool
func getShouldCopyFunc(srcDir string) ShouldCopy {
return func(src string, info os.FileInfo) bool {
if srcDir == src {
return true
}
ext := path.Ext(src)
if ext == ".go" {
return true
}
return false
}
}
// CopyFile copies the contents of the file named src to the file named
// by dst. The file will be created if it does not already exist. If the
// destination file exists, all it's contents will be replaced by the contents
// of the source file. The file mode will be copied from the source and
// the copied data is synced/flushed to stable storage.
func CopyFile(src, dst string) (err error) {
in, err := os.Open(src)
if err != nil {
return
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return
}
defer func() {
if e := out.Close(); e != nil {
err = e
}
}()
_, err = io.Copy(out, in)
if err != nil {
return
}
err = out.Sync()
if err != nil {
return
}
si, err := os.Stat(src)
if err != nil {
return
}
err = os.Chmod(dst, si.Mode())
if err != nil {
return
}
return
}
// CopyDir recursively copies a directory tree, attempting to preserve permissions.
// Source directory must exist, destination directory must *not* exist.
// Symlinks are ignored and skipped.
func CopyDir(src string, dst string, shouldCopy ShouldCopy) (err error) {
src = filepath.Clean(src)
dst = filepath.Clean(dst)
si, err := os.Stat(src)
if err != nil {
return err
}
if !si.IsDir() {
return fmt.Errorf("source is not a directory")
}
if !shouldCopy(src, si) {
return nil
}
_, err = os.Stat(dst)
if err != nil && !os.IsNotExist(err) {
return
}
//if err == nil {
// return fmt.Errorf("destination already exists")
//}
err = os.MkdirAll(dst, si.Mode())
if err != nil {
return
}
entries, err := ioutil.ReadDir(src)
if err != nil {
return
}
for _, entry := range entries {
srcPath := filepath.Join(src, entry.Name())
dstPath := filepath.Join(dst, entry.Name())
if entry.IsDir() {
err = CopyDir(srcPath, dstPath, shouldCopy)
if err != nil {
return
}
} else {
// Skip symlinks.
if entry.Mode()&os.ModeSymlink != 0 {
continue
}
if !shouldCopy(srcPath, entry) {
continue
}
err = CopyFile(srcPath, dstPath)
if err != nil {
return
}
}
}
return
}