def test_new_ifd_entry_from_blob_with_offset(ifd_entry):
entry = IfdEntry("<", blob=(b'\x00' + ifd_entry), offset=1, tags=tags)
assert entry.tag_id == 271
assert entry.tag_name == 'make'
assert entry.tag_type == 's'
assert entry.value_len == 6
assert entry.raw_value == 232
def test_new_ifd_entry_from_blob(ifd_entry):
entry = IfdEntry("<", blob=ifd_entry, tags=tags)
assert entry.tag_id == 271
assert entry.tag_name == 'make'
assert entry.tag_type == 's'
assert entry.value_len == 6
assert entry.raw_value == 232
def test_new_ifd_entry_from_file(tmpdir, ifd_entry):
p = tmpdir.realpath().strpath
with open(os.path.join(p, 'ifd_entry'), mode='w+b') as tmpfile:
tmpfile.write(ifd_entry)
tmpfile.seek(0)
entry = IfdEntry("<", file=tmpfile, tags=tags)
assert entry.tag_id == 271
assert entry.tag_name == 'make'
assert entry.tag_type == 's'
assert entry.value_len == 6
assert entry.raw_value == 232
def test_ifd_entry_short_value_seeks_to_end(entry_length_short_value):
bytesio = BytesIO(entry_length_short_value)
IfdEntry("<", file=bytesio, rewind=False)
assert bytesio.tell() == 12
def test_ifd_entry_no_offset_multi_value(entry_length_no_offset):
entry = IfdEntry("<", blob=entry_length_no_offset)
assert entry.raw_value == (46850, 768)
def test_raw_value_not_offset(ifd_entry_not_offset):
entry = IfdEntry("<", blob=ifd_entry_not_offset)
assert entry.raw_value == 46848
def test_unknown_tag_name_should_be_id(unknown_tag_ifd_entry):
entry = IfdEntry("<", blob=unknown_tag_ifd_entry)
assert entry.tag_name == 50885
def test_new_ifd_no_offset(ifd_entry):
with pytest.raises(KeyError):
IfdEntry("<", blob=(b'\x00' + ifd_entry), tags=tags)
def test_ifd_entry_must_have_single_data_source():
with pytest.raises(TypeError):
IfdEntry("<")
with pytest.raises(TypeError):
IfdEntry("<", blob=1, file=1, offset=1)