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Source file src/compress/gzip/issue14937_test.go

Documentation: compress/gzip

     1  package gzip
     2  
     3  import (
     4  	"internal/testenv"
     5  	"os"
     6  	"path/filepath"
     7  	"runtime"
     8  	"strings"
     9  	"testing"
    10  )
    11  
    12  // TestGZIPFilesHaveZeroMTimes checks that every .gz file in the tree
    13  // has a zero MTIME. This is a requirement for the Debian maintainers
    14  // to be able to have deterministic packages.
    15  //
    16  // See https://golang.org/issue/14937.
    17  func TestGZIPFilesHaveZeroMTimes(t *testing.T) {
    18  	// To avoid spurious false positives due to untracked GZIP files that
    19  	// may be in the user's GOROOT (Issue 18604), we only run this test on
    20  	// the builders, which should have a clean checkout of the tree.
    21  	if testenv.Builder() == "" {
    22  		t.Skip("skipping test on non-builder")
    23  	}
    24  	if !testenv.HasSrc() {
    25  		t.Skip("skipping; no GOROOT available")
    26  	}
    27  
    28  	goroot, err := filepath.EvalSymlinks(runtime.GOROOT())
    29  	if err != nil {
    30  		t.Fatal("error evaluating GOROOT: ", err)
    31  	}
    32  	var files []string
    33  	err = filepath.Walk(goroot, func(path string, info os.FileInfo, err error) error {
    34  		if err != nil {
    35  			return err
    36  		}
    37  		if !info.IsDir() && strings.HasSuffix(path, ".gz") {
    38  			files = append(files, path)
    39  		}
    40  		return nil
    41  	})
    42  	if err != nil {
    43  		if os.IsNotExist(err) {
    44  			t.Skipf("skipping: GOROOT directory not found: %s", runtime.GOROOT())
    45  		}
    46  		t.Fatal("error collecting list of .gz files in GOROOT: ", err)
    47  	}
    48  	if len(files) == 0 {
    49  		t.Fatal("expected to find some .gz files under GOROOT")
    50  	}
    51  	for _, path := range files {
    52  		checkZeroMTime(t, path)
    53  	}
    54  }
    55  
    56  func checkZeroMTime(t *testing.T, path string) {
    57  	f, err := os.Open(path)
    58  	if err != nil {
    59  		t.Error(err)
    60  		return
    61  	}
    62  	defer f.Close()
    63  	gz, err := NewReader(f)
    64  	if err != nil {
    65  		t.Errorf("cannot read gzip file %s: %s", path, err)
    66  		return
    67  	}
    68  	defer gz.Close()
    69  	if !gz.ModTime.IsZero() {
    70  		t.Errorf("gzip file %s has non-zero mtime (%s)", path, gz.ModTime)
    71  	}
    72  }
    73  

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