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pkg/tarsum: adding more tests

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Ensuring case size of headers will still be accounted for.
https://github.com/docker/docker/pull/8869#discussion_r20114401

Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit is contained in:
Vincent Batts 2014-11-11 08:48:11 -05:00
parent bf0a0e9ca7
commit 58acf884c3
1 changed files with 147 additions and 0 deletions
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147
tarsum/tarsum_test.go
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@ -318,6 +318,153 @@ func TestTarSums(t *testing.T) {
}
}
func TestIteration(t *testing.T) {
headerTests := []struct {
expectedSum string // TODO(vbatts) it would be nice to get individual sums of each
version Version
hdr *tar.Header
data []byte
}{
{
"tarsum+sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
Version0,
&tar.Header{
Name: "file.txt",
Size: 0,
Typeflag: tar.TypeReg,
Devminor: 0,
Devmajor: 0,
},
[]byte(""),
},
{
"tarsum.dev+sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
VersionDev,
&tar.Header{
Name: "file.txt",
Size: 0,
Typeflag: tar.TypeReg,
Devminor: 0,
Devmajor: 0,
},
[]byte(""),
},
{
"tarsum.dev+sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
VersionDev,
&tar.Header{
Name: "another.txt",
Uid: 1000,
Gid: 1000,
Uname: "slartibartfast",
Gname: "users",
Size: 4,
Typeflag: tar.TypeReg,
Devminor: 0,
Devmajor: 0,
},
[]byte("test"),
},
{
"tarsum.dev+sha256:4cc2e71ac5d31833ab2be9b4f7842a14ce595ec96a37af4ed08f87bc374228cd",
VersionDev,
&tar.Header{
Name: "xattrs.txt",
Uid: 1000,
Gid: 1000,
Uname: "slartibartfast",
Gname: "users",
Size: 4,
Typeflag: tar.TypeReg,
Xattrs: map[string]string{
"user.key1": "value1",
"user.key2": "value2",
},
},
[]byte("test"),
},
{
"tarsum.dev+sha256:65f4284fa32c0d4112dd93c3637697805866415b570587e4fd266af241503760",
VersionDev,
&tar.Header{
Name: "xattrs.txt",
Uid: 1000,
Gid: 1000,
Uname: "slartibartfast",
Gname: "users",
Size: 4,
Typeflag: tar.TypeReg,
Xattrs: map[string]string{
"user.KEY1": "value1", // adding different case to ensure different sum
"user.key2": "value2",
},
},
[]byte("test"),
},
{
"tarsum+sha256:c12bb6f1303a9ddbf4576c52da74973c00d14c109bcfa76b708d5da1154a07fa",
Version0,
&tar.Header{
Name: "xattrs.txt",
Uid: 1000,
Gid: 1000,
Uname: "slartibartfast",
Gname: "users",
Size: 4,
Typeflag: tar.TypeReg,
Xattrs: map[string]string{
"user.NOT": "CALCULATED",
},
},
[]byte("test"),
},
}
for _, htest := range headerTests {
s, err := renderSumForHeader(htest.version, htest.hdr, htest.data)
if err != nil {
t.Fatal(err)
}
if s != htest.expectedSum {
t.Errorf("expected sum: %q, got: %q", htest.expectedSum, s)
}
}
}
func renderSumForHeader(v Version, h *tar.Header, data []byte) (string, error) {
buf := bytes.NewBuffer(nil)
// first build our test tar
tw := tar.NewWriter(buf)
if err := tw.WriteHeader(h); err != nil {
return "", err
}
if _, err := tw.Write(data); err != nil {
return "", err
}
tw.Close()
ts, err := NewTarSum(buf, true, v)
if err != nil {
return "", err
}
tr := tar.NewReader(ts)
for {
hdr, err := tr.Next()
if hdr == nil || err == io.EOF {
break
}
if err != nil {
return "", err
}
if _, err = io.Copy(ioutil.Discard, tr); err != nil {
return "", err
}
break // we're just reading one header ...
}
return ts.Sum(nil), nil
}
func Benchmark9kTar(b *testing.B) {
buf := bytes.NewBuffer([]byte{})
fh, err := os.Open("testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar")