def test_blocking_writer(p):
buf = BytesIO()
writer = blocking_writer(p.coroutine, buf)
for i in range(p.input):
result_type = writer.send(None)
assert isinstance(result_type, WriteEventType) and result_type is not WriteEventType.HAS_PENDING
assert p.expected == buf.getvalue()
def write_with_shared_symbol_table_events():
structs = get_csv_structs()
table = shared_symbol_table(u'test.csv.columns', 1,
(u'id', u'type', u'state'))
data = BytesIO()
writer = blocking_writer(binary_writer(imports=(table, )), data)
for struct in structs:
writer.send(IonEvent(IonEventType.CONTAINER_START, IonType.STRUCT))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.INT,
field_name=u'id',
value=struct[u'id']))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.STRING,
field_name=u'type',
value=struct[u'type']))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.BOOL,
field_name=u'state',
value=struct[u'state']))
writer.send(IonEvent(IonEventType.CONTAINER_END))
writer.send(ION_STREAM_END_EVENT)
return data.getvalue()
def _run_test(writer_provider, events, algorithm):
# capture behavior of an ion-python writer
expected_bytes = BytesIO()
w = blocking_writer(writer_provider(), expected_bytes)
expected_write_event_types = _write_to(w, events)
hw_bytes = BytesIO()
hw = hash_writer(blocking_writer(writer_provider(), hw_bytes),
hash_function_provider(algorithm))
hw_write_event_types = _write_to(hw, events)
# assert writer/hash_writer response behavior is identical
assert hw_write_event_types == expected_write_event_types
# assert writer/hash_writer produced the same output
assert hw_bytes.getvalue() == expected_bytes.getvalue()
def test_convert_csv_events():
# http://amzn.github.io/ion-docs/guides/cookbook.html#converting-non-hierarchical-data-to-ion
structs = get_csv_structs()
ion = BytesIO()
writer = blocking_writer(binary_writer(), ion)
for struct in structs:
writer.send(IonEvent(IonEventType.CONTAINER_START, IonType.STRUCT))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.INT,
field_name=u'id',
value=struct[u'id']))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.STRING,
field_name=u'type',
value=struct[u'type']))
writer.send(
IonEvent(IonEventType.SCALAR,
IonType.BOOL,
field_name=u'state',
value=struct[u'state']))
writer.send(IonEvent(IonEventType.CONTAINER_END))
writer.send(ION_STREAM_END_EVENT)
assert b'\xe0\x01\x00\xea\xee\x95\x81\x83\xde\x91\x87\xbe\x8e\x82id\x84type\x85state\xde\x8a\x8a!' \
b'\x01\x8b\x83foo\x8c\x10\xde\x8a\x8a!\x02\x8b\x83bar\x8c\x11\xde\x8a\x8a!\x03\x8b\x83baz\x8c\x11' \
== ion.getvalue()
def test_blocking_writer(p):
buf = BytesIO()
writer = blocking_writer(p.coroutine, buf)
for i in range(p.input):
result_type = writer.send(None)
assert isinstance(
result_type,
WriteEventType) and result_type is not WriteEventType.HAS_PENDING
assert p.expected == buf.getvalue()
def test_write_numeric_with_annotation_events():
# http://amzn.github.io/ion-docs/guides/cookbook.html#reading-numeric-types
event = IonEvent(IonEventType.SCALAR,
IonType.FLOAT,
annotations=(u'abc', ),
value=123.0)
data = BytesIO()
writer = blocking_writer(text_writer(), data)
writer.send(event)
writer.send(ION_STREAM_END_EVENT)
assert u'abc::123.0e0' == data.getvalue().decode(u'utf-8')
def _f(algorithm):
buf.seek(0)
reader = ion_reader.blocking_reader(
managed_reader(reader_provider(), None), buf)
writer = hash_writer(
blocking_writer(raw_writer(), BytesIO()),
hash_function_provider(algorithm, _actual_updates,
_actual_digests))
_consume(reader, writer)
digest = writer.send(HashEvent.DIGEST)
writer.send(IonEvent(IonEventType.STREAM_END))
return digest
def test_no_fieldname_in_hash(test_data):
"""
This test verifies a hash_reader/writer that receives field events but did not
receive the preceeding "begin struct" event DOES NOT include the field_name as
part of the hash.
"""
reader = binary_reader_over(test_data.ion_str)
events = consume(reader)
buf = BytesIO()
writer = blocking_writer(raw_writer(), buf)
writer.send(IonEvent(IonEventType.CONTAINER_START, IonType.STRUCT))
hw = hash_writer(writer, hash_function_provider("identity"))
for e in events[:-1]:
field_name = e.field_name
if e.depth == 0:
field_name = SymbolToken("field_name", None)
new_event = IonEvent(e.event_type, e.ion_type, e.value, field_name, e.annotations, e.depth + 1)
hw.send(new_event)
writer.send(IonEvent(IonEventType.CONTAINER_END, IonType.STRUCT))
writer.send(events[-1]) # send the final event (which should be a STREAM_END event)
output = buf.getvalue()
hw_digest = hw.send(HashEvent.DIGEST)
assert hw_digest == test_data.expected_digest
reader = binary_reader_over(output)
hr_digest = b''
while True:
event = reader.send(NEXT_EVENT)
if event.event_type == IonEventType.CONTAINER_START:
hr = hash_reader(reader, hash_function_provider("identity"))
for i in range(0, len(events) - 1):
e = hr.send(NEXT_EVENT)
hr_digest = hr.send(HashEvent.DIGEST)
if event.event_type == IonEventType.STREAM_END:
break
assert hr_digest == test_data.expected_digest
def test_writing_events_blocking():
# http://amzn.github.io/ion-docs/guides/cookbook.html#reading-and-writing-ion-data
data = BytesIO()
writer = blocking_writer(binary_writer(), data)
event_type = writer.send(
IonEvent(IonEventType.CONTAINER_START, IonType.STRUCT))
# The value is not complete, so more events are required.
assert event_type == WriteEventType.NEEDS_INPUT
event_type = writer.send(
IonEvent(IonEventType.SCALAR,
IonType.STRING,
field_name=u'hello',
value=u'world'))
# The value is not complete, so more events are required.
assert event_type == WriteEventType.NEEDS_INPUT
event_type = writer.send(IonEvent(IonEventType.CONTAINER_END))
# The value is not complete, so more events are required.
assert event_type == WriteEventType.NEEDS_INPUT
event_type = writer.send(ION_STREAM_END_EVENT)
# The end of the stream was signaled, so the data has been flushed.
assert event_type == WriteEventType.COMPLETE
assert b'\xe0\x01\x00\xea\xec\x81\x83\xde\x88\x87\xb6\x85hello\xde\x87\x8a\x85world' == data.getvalue(
)
def ion_hash(self, algorithm=None, hash_function_provider=None):
"""Given an algorithm or hash_function_provider, computes the Ion hash
of this value.
Args:
algorithm:
A string corresponding to the name of a hash algorithm supported
by the `hashlib` module.
hash_function_provider:
A function that returns a new ``IonHasher`` instance when called.
Note that multiple ``IonHasher`` instances may be required to hash a single value
(depending on the type of the Ion value).
Returns:
`bytes` that represent the Ion hash of this value for the specified algorithm
or hash_function_provider.
"""
if algorithm is None and hash_function_provider is None:
raise Exception(
"Either 'algorithm' or 'hash_function_provider' must be specified")
if algorithm is not None and hash_function_provider is not None:
raise Exception(
"Either 'algorithm' or 'hash_function_provider' must be specified, not both"
)
if algorithm is not None:
hfp = hashlib_hash_function_provider(algorithm)
else:
hfp = hash_function_provider
hw = hash_writer(blocking_writer(binary_writer(), BytesIO()), hfp)
_dump(self, hw, _FROM_TYPE)
hw.send(ION_STREAM_END_EVENT)
return hw.send(HashEvent.DIGEST)
def new_writer():
out = BytesIO()
return out, blocking_writer(_raw_binary_writer(BufferTree()), out)
def new_writer():
buf = BytesIO()
return buf, blocking_writer(raw_writer(), buf)
def new_writer():
buf = BytesIO()
return buf, blocking_writer(raw_writer(), buf)
def new_writer(imports=None):
out = BytesIO()
return out, blocking_writer(binary_writer(imports), out)
def new_writer(imports=None):
out = BytesIO()
return out, blocking_writer(binary_writer(imports), out)
def test_pretty_print_events():
# http://amzn.github.io/ion-docs/guides/cookbook.html#pretty-printing
pretty = BytesIO()
writer = blocking_writer(text_writer(indent=u' '), pretty)
writer.send(ION_STREAM_END_EVENT)
