...
Run Format

Source file src/compress/gzip/issue14937_test.go

Documentation: compress/gzip

  package gzip
  
  import (
  	"internal/testenv"
  	"os"
  	"path/filepath"
  	"runtime"
  	"strings"
  	"testing"
  )
  
  // TestGZIPFilesHaveZeroMTimes checks that every .gz file in the tree
  // has a zero MTIME. This is a requirement for the Debian maintainers
  // to be able to have deterministic packages.
  //
  // See https://golang.org/issue/14937.
  func TestGZIPFilesHaveZeroMTimes(t *testing.T) {
  	// To avoid spurious false positives due to untracked GZIP files that
  	// may be in the user's GOROOT (Issue 18604), we only run this test on
  	// the builders, which should have a clean checkout of the tree.
  	if testenv.Builder() == "" {
  		t.Skip("skipping test on non-builder")
  	}
  	goroot, err := filepath.EvalSymlinks(runtime.GOROOT())
  	if err != nil {
  		t.Fatal("error evaluating GOROOT: ", err)
  	}
  	var files []string
  	err = filepath.Walk(goroot, func(path string, info os.FileInfo, err error) error {
  		if err != nil {
  			return err
  		}
  		if !info.IsDir() && strings.HasSuffix(path, ".gz") {
  			files = append(files, path)
  		}
  		return nil
  	})
  	if err != nil {
  		if os.IsNotExist(err) {
  			t.Skipf("skipping: GOROOT directory not found: %s", runtime.GOROOT())
  		}
  		t.Fatal("error collecting list of .gz files in GOROOT: ", err)
  	}
  	if len(files) == 0 {
  		t.Fatal("expected to find some .gz files under GOROOT")
  	}
  	for _, path := range files {
  		checkZeroMTime(t, path)
  	}
  }
  
  func checkZeroMTime(t *testing.T, path string) {
  	f, err := os.Open(path)
  	if err != nil {
  		t.Error(err)
  		return
  	}
  	defer f.Close()
  	gz, err := NewReader(f)
  	if err != nil {
  		t.Errorf("cannot read gzip file %s: %s", path, err)
  		return
  	}
  	defer gz.Close()
  	if !gz.ModTime.IsZero() {
  		t.Errorf("gzip file %s has non-zero mtime (%s)", path, gz.ModTime)
  	}
  }
  

View as plain text