Gname:    "strings",
				ModTime:  time.Unix(1314603082, 0),
			}, nil},
			testWrite{"", 0, nil},

			testClose{nil},
		},
	}, {
		// The truncated test file was produced using these commands:
		//   dd if=/dev/zero bs=1048576 count=16384 > /tmp/16gig.txt
		//   tar -b 1 -c -f- /tmp/16gig.txt | dd bs=512 count=8 > writer-big.tar
		file: "testdata/writer-big.tar",
		tests: []testFnc{

		t.Errorf("unexpected crc, compress and uncompressed size to be 0 was: %v", b[14:26])
	}

	binary.LittleEndian.PutUint32(sig[:], uint32(dataDescriptorSignature))
	if bytes.Contains(b, sig[:]) {
		t.Error("there should be no data descriptor")
	}
}

func TestWriterCopy(t *testing.T) {
	// make a zip file
	buf := new(bytes.Buffer)
	w := NewWriter(buf)
	for _, wt := range writeTests {
		testCreate(t, w, &wt)