t.Fatal(err)
	}

	// read it back
	r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
	if err != nil {
		t.Fatal(err)
	}
	for i, wt := range writeTests {
		testReadFile(t, r.File[i], &wt)
	}
}

// TestWriterComment is test for EOCD comment read/write.
func TestWriterComment(t *testing.T) {
	var tests = []struct {
		comment string
		ok      bool
	}{