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py_test.py
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# coding=utf-8
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os.path
import sys
import imp
PY_VERSION = sys.version_info[:2]
import ctypes
from collections import defaultdict
import math
import random
import timeit
import unittest
from flatbuffers import compat
from flatbuffers import util
from flatbuffers.compat import range_func as compat_range
from flatbuffers.compat import NumpyRequiredForThisFeature
import flatbuffers
from flatbuffers import number_types as N
import MyGame # refers to generated code
import MyGame.Example # refers to generated code
import MyGame.Example.Any # refers to generated code
import MyGame.Example.Color # refers to generated code
import MyGame.Example.Monster # refers to generated code
import MyGame.Example.Test # refers to generated code
import MyGame.Example.Stat # refers to generated code
import MyGame.Example.Vec3 # refers to generated code
import MyGame.MonsterExtra # refers to generated code
import MyGame.InParentNamespace # refers to generated code
import MyGame.Example.ArrayTable # refers to generated code
import MyGame.Example.ArrayStruct # refers to generated code
import MyGame.Example.NestedStruct # refers to generated code
import MyGame.Example.TestEnum # refers to generated code
def assertRaises(test_case, fn, exception_class):
''' Backwards-compatible assertion for exceptions raised. '''
exc = None
try:
fn()
except Exception as e:
exc = e
test_case.assertTrue(exc is not None)
test_case.assertTrue(isinstance(exc, exception_class))
class TestWireFormat(unittest.TestCase):
def test_wire_format(self):
# Verify that using the generated Python code builds a buffer without
# returning errors, and is interpreted correctly, for size prefixed
# representation and regular:
for sizePrefix in [True, False]:
for file_identifier in [None, b"MONS"]:
gen_buf, gen_off = make_monster_from_generated_code(sizePrefix=sizePrefix, file_identifier=file_identifier)
CheckReadBuffer(gen_buf, gen_off, sizePrefix=sizePrefix, file_identifier=file_identifier)
# Verify that the canonical flatbuffer file is readable by the
# generated Python code. Note that context managers are not part of
# Python 2.5, so we use the simpler open/close methods here:
f = open('monsterdata_test.mon', 'rb')
canonicalWireData = f.read()
f.close()
CheckReadBuffer(bytearray(canonicalWireData), 0, file_identifier=b'MONS')
# Write the generated buffer out to a file:
f = open('monsterdata_python_wire.mon', 'wb')
f.write(gen_buf[gen_off:])
f.close()
class TestObjectBasedAPI(unittest.TestCase):
''' Tests the generated object based API.'''
def test_consistenty_with_repeated_pack_and_unpack(self):
''' Checks the serialization and deserialization between a buffer and
its python object. It tests in the same way as the C++ object API test,
ObjectFlatBuffersTest in test.cpp. '''
buf, off = make_monster_from_generated_code()
# Turns a buffer into Python object (T class).
monster1 = MyGame.Example.Monster.Monster.GetRootAsMonster(buf, off)
monsterT1 = MyGame.Example.Monster.MonsterT.InitFromObj(monster1)
for sizePrefix in [True, False]:
# Re-serialize the data into a buffer.
b1 = flatbuffers.Builder(0)
if sizePrefix:
b1.FinishSizePrefixed(monsterT1.Pack(b1))
else:
b1.Finish(monsterT1.Pack(b1))
CheckReadBuffer(b1.Bytes, b1.Head(), sizePrefix)
# Deserializes the buffer into Python object again.
monster2 = MyGame.Example.Monster.Monster.GetRootAsMonster(b1.Bytes,
b1.Head())
# Re-serializes the data into a buffer for one more time.
monsterT2 = MyGame.Example.Monster.MonsterT.InitFromObj(monster2)
for sizePrefix in [True, False]:
# Re-serializes the data into a buffer
b2 = flatbuffers.Builder(0)
if sizePrefix:
b2.FinishSizePrefixed(monsterT2.Pack(b2))
else:
b2.Finish(monsterT2.Pack(b2))
CheckReadBuffer(b2.Bytes, b2.Head(), sizePrefix)
def test_default_values_with_pack_and_unpack(self):
''' Serializes and deserializes between a buffer with default values (no
specific values are filled when the buffer is created) and its python
object. '''
# Creates a flatbuffer with default values.
b1 = flatbuffers.Builder(0)
MyGame.Example.Monster.MonsterStart(b1)
gen_mon = MyGame.Example.Monster.MonsterEnd(b1)
b1.Finish(gen_mon)
# Converts the flatbuffer into the object class.
monster1 = MyGame.Example.Monster.Monster.GetRootAsMonster(b1.Bytes,
b1.Head())
monsterT1 = MyGame.Example.Monster.MonsterT.InitFromObj(monster1)
# Packs the object class into another flatbuffer.
b2 = flatbuffers.Builder(0)
b2.Finish(monsterT1.Pack(b2))
monster2 = MyGame.Example.Monster.Monster.GetRootAsMonster(b2.Bytes,
b2.Head())
# Checks the default values.
self.assertTrue(monster2.Pos() is None)
self.assertEqual(monster2.Mana(),150)
self.assertEqual(monster2.Hp(), 100)
self.assertTrue(monster2.Name() is None)
self.assertEqual(monster2.Inventory(0), 0)
self.assertEqual(monster2.InventoryAsNumpy(), 0)
self.assertEqual(monster2.InventoryLength(), 0)
self.assertTrue(monster2.InventoryIsNone())
self.assertTrue(monster2.Color() is 8)
self.assertEqual(monster2.TestType(), 0)
self.assertTrue(monster2.Test() is None)
self.assertTrue(monster2.Test4(0) is None)
self.assertEqual(monster2.Test4Length(), 0)
self.assertTrue(monster2.Test4IsNone())
self.assertTrue(monster2.Testarrayofstring(0) is "")
self.assertEqual(monster2.TestarrayofstringLength(), 0)
self.assertTrue(monster2.TestarrayofstringIsNone())
self.assertTrue(monster2.Testarrayoftables(0) is None)
self.assertEqual(monster2.TestarrayoftablesLength(), 0)
self.assertTrue(monster2.TestarrayoftablesIsNone())
self.assertTrue(monster2.Enemy() is None)
self.assertEqual(monster2.Testnestedflatbuffer(0), 0)
self.assertEqual(monster2.TestnestedflatbufferAsNumpy(), 0)
self.assertEqual(monster2.TestnestedflatbufferLength(), 0)
self.assertTrue(monster2.TestnestedflatbufferIsNone())
self.assertTrue(monster2.Testempty() is None)
self.assertTrue(monster2.Testbool() is False)
self.assertEqual(monster2.Testhashs32Fnv1(), 0)
self.assertEqual(monster2.Testhashu32Fnv1(), 0)
self.assertEqual(monster2.Testhashs64Fnv1(), 0)
self.assertEqual(monster2.Testhashu64Fnv1(), 0)
self.assertEqual(monster2.Testhashs32Fnv1a(), 0)
self.assertEqual(monster2.Testhashu32Fnv1a(), 0)
self.assertEqual(monster2.Testhashs64Fnv1a(), 0)
self.assertEqual(monster2.Testhashu64Fnv1a(), 0)
self.assertEqual(monster2.Testarrayofbools(0), 0)
self.assertEqual(monster2.TestarrayofboolsAsNumpy(), 0)
self.assertEqual(monster2.TestarrayofboolsLength(), 0)
self.assertTrue(monster2.TestarrayofboolsIsNone())
self.assertEqual(monster2.Testf(), 3.14159)
self.assertEqual(monster2.Testf2(), 3.0)
self.assertEqual(monster2.Testf3(), 0.0)
self.assertTrue(monster2.Testarrayofstring2(0) is "")
self.assertEqual(monster2.Testarrayofstring2Length(), 0)
self.assertTrue(monster2.Testarrayofstring2IsNone())
self.assertTrue(monster2.Testarrayofsortedstruct(0) is None)
self.assertEqual(monster2.TestarrayofsortedstructLength(), 0)
self.assertTrue(monster2.TestarrayofsortedstructIsNone())
self.assertEqual(monster2.Flex(0), 0)
self.assertEqual(monster2.FlexAsNumpy(), 0)
self.assertEqual(monster2.FlexLength(), 0)
self.assertTrue(monster2.FlexIsNone())
self.assertTrue(monster2.Test5(0) is None)
self.assertEqual(monster2.Test5Length(), 0)
self.assertTrue(monster2.Test5IsNone())
self.assertEqual(monster2.VectorOfLongs(0), 0)
self.assertEqual(monster2.VectorOfLongsAsNumpy(), 0)
self.assertEqual(monster2.VectorOfLongsLength(), 0)
self.assertTrue(monster2.VectorOfLongsIsNone())
self.assertEqual(monster2.VectorOfDoubles(0), 0)
self.assertEqual(monster2.VectorOfDoublesAsNumpy(), 0)
self.assertEqual(monster2.VectorOfDoublesLength(), 0)
self.assertTrue(monster2.VectorOfDoublesIsNone())
self.assertTrue(monster2.ParentNamespaceTest() is None)
self.assertTrue(monster2.VectorOfReferrables(0) is None)
self.assertEqual(monster2.VectorOfReferrablesLength(), 0)
self.assertTrue(monster2.VectorOfReferrablesIsNone())
self.assertEqual(monster2.SingleWeakReference(), 0)
self.assertEqual(monster2.VectorOfWeakReferences(0), 0)
self.assertEqual(monster2.VectorOfWeakReferencesAsNumpy(), 0)
self.assertEqual(monster2.VectorOfWeakReferencesLength(), 0)
self.assertTrue(monster2.VectorOfWeakReferencesIsNone())
self.assertTrue(monster2.VectorOfStrongReferrables(0) is None)
self.assertEqual(monster2.VectorOfStrongReferrablesLength(), 0)
self.assertTrue(monster2.VectorOfStrongReferrablesIsNone())
self.assertEqual(monster2.CoOwningReference(), 0)
self.assertEqual(monster2.VectorOfCoOwningReferences(0), 0)
self.assertEqual(monster2.VectorOfCoOwningReferencesAsNumpy(), 0)
self.assertEqual(monster2.VectorOfCoOwningReferencesLength(), 0)
self.assertTrue(monster2.VectorOfCoOwningReferencesIsNone())
self.assertEqual(monster2.NonOwningReference(), 0)
self.assertEqual(monster2.VectorOfNonOwningReferences(0), 0)
self.assertEqual(monster2.VectorOfNonOwningReferencesAsNumpy(), 0)
self.assertEqual(monster2.VectorOfNonOwningReferencesLength(), 0)
self.assertTrue(monster2.VectorOfNonOwningReferencesIsNone())
self.assertEqual(monster2.AnyUniqueType(), 0)
self.assertTrue(monster2.AnyUnique() is None)
self.assertEqual(monster2.AnyAmbiguousType(), 0)
self.assertTrue(monster2.AnyAmbiguous() is None)
self.assertEqual(monster2.VectorOfEnums(0), 0)
self.assertEqual(monster2.VectorOfEnumsAsNumpy(), 0)
self.assertEqual(monster2.VectorOfEnumsLength(), 0)
self.assertTrue(monster2.VectorOfEnumsIsNone())
class TestAllMutableCodePathsOfExampleSchema(unittest.TestCase):
''' Tests the object API generated for monster_test.fbs for mutation
purposes. In each test, the default values will be changed through the
object API. We'll then pack the object class into the buf class and read
the updated values out from it to validate if the values are mutated as
expected.'''
def setUp(self, *args, **kwargs):
super(TestAllMutableCodePathsOfExampleSchema, self).setUp(*args,
**kwargs)
# Creates an empty monster flatbuffer, and loads it into the object
# class for future tests.
b = flatbuffers.Builder(0)
MyGame.Example.Monster.MonsterStart(b)
self.monsterT = self._create_and_load_object_class(b)
def _pack_and_load_buf_class(self, monsterT):
''' Packs the object class into a flatbuffer and loads it into a buf
class.'''
b = flatbuffers.Builder(0)
b.Finish(monsterT.Pack(b))
monster = MyGame.Example.Monster.Monster.GetRootAsMonster(b.Bytes,
b.Head())
return monster
def _create_and_load_object_class(self, b):
''' Finishs the creation of a monster flatbuffer and loads it into an
object class.'''
gen_mon = MyGame.Example.Monster.MonsterEnd(b)
b.Finish(gen_mon)
monster = MyGame.Example.Monster.Monster.GetRootAsMonster(b.Bytes,
b.Head())
monsterT = MyGame.Example.Monster.MonsterT()
monsterT.InitFromObj(monster)
return monsterT
def test_mutate_pos(self):
posT = MyGame.Example.Vec3.Vec3T()
posT.x = 4.0
posT.y = 5.0
posT.z = 6.0
posT.test1 = 6.0
posT.test2 = 7
test3T = MyGame.Example.Test.TestT()
test3T.a = 8
test3T.b = 9
posT.test3 = test3T
self.monsterT.pos = posT
# Packs the updated values.
monster = self._pack_and_load_buf_class(self.monsterT)
# Checks if values are loaded correctly into the object class.
pos = monster.Pos()
# Verifies the properties of the Vec3.
self.assertEqual(pos.X(), 4.0)
self.assertEqual(pos.Y(), 5.0)
self.assertEqual(pos.Z(), 6.0)
self.assertEqual(pos.Test1(), 6.0)
self.assertEqual(pos.Test2(), 7)
t3 = MyGame.Example.Test.Test()
t3 = pos.Test3(t3)
self.assertEqual(t3.A(), 8)
self.assertEqual(t3.B(), 9)
def test_mutate_mana(self):
self.monsterT.mana = 200
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Mana(), 200)
def test_mutate_hp(self):
self.monsterT.hp = 200
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Hp(), 200)
def test_mutate_name(self):
self.monsterT.name = "MyMonster"
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Name(), b"MyMonster")
def test_mutate_inventory(self):
self.monsterT.inventory = [1, 7, 8]
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Inventory(0), 1)
self.assertEqual(monster.Inventory(1), 7)
self.assertEqual(monster.Inventory(2), 8)
def test_empty_inventory(self):
self.monsterT.inventory = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.InventoryIsNone())
def test_mutate_color(self):
self.monsterT.color = MyGame.Example.Color.Color.Red
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Color(), MyGame.Example.Color.Color.Red)
def test_mutate_testtype(self):
self.monsterT.testType = MyGame.Example.Any.Any.Monster
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.TestType(), MyGame.Example.Any.Any.Monster)
def test_mutate_test(self):
testT = MyGame.Example.Monster.MonsterT()
testT.hp = 200
self.monsterT.test = testT
monster = self._pack_and_load_buf_class(self.monsterT)
# Initializes a Table from a union field Test(...).
table = monster.Test()
# Initializes a Monster from the Table from the union.
test_monster = MyGame.Example.Monster.Monster()
test_monster.Init(table.Bytes, table.Pos)
self.assertEqual(test_monster.Hp(), 200)
def test_mutate_test4(self):
test0T = MyGame.Example.Test.TestT()
test0T.a = 10
test0T.b = 20
test1T = MyGame.Example.Test.TestT()
test1T.a = 30
test1T.b = 40
self.monsterT.test4 = [test0T, test1T]
monster = self._pack_and_load_buf_class(self.monsterT)
test0 = monster.Test4(0)
self.assertEqual(test0.A(), 10)
self.assertEqual(test0.B(), 20)
test1 = monster.Test4(1)
self.assertEqual(test1.A(), 30)
self.assertEqual(test1.B(), 40)
def test_empty_test4(self):
self.monsterT.test4 = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.Test4IsNone())
def test_mutate_testarrayofstring(self):
self.monsterT.testarrayofstring = []
self.monsterT.testarrayofstring.append("test1")
self.monsterT.testarrayofstring.append("test2")
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testarrayofstring(0), b"test1")
self.assertEqual(monster.Testarrayofstring(1), b"test2")
def test_empty_testarrayofstring(self):
self.monsterT.testarrayofstring = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.TestarrayofstringIsNone())
def test_mutate_testarrayoftables(self):
monsterT0 = MyGame.Example.Monster.MonsterT()
monsterT0.hp = 200
monsterT1 = MyGame.Example.Monster.MonsterT()
monsterT1.hp = 400
self.monsterT.testarrayoftables = []
self.monsterT.testarrayoftables.append(monsterT0)
self.monsterT.testarrayoftables.append(monsterT1)
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testarrayoftables(0).Hp(), 200)
self.assertEqual(monster.Testarrayoftables(1).Hp(), 400)
def test_empty_testarrayoftables(self):
self.monsterT.testarrayoftables = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.TestarrayoftablesIsNone())
def test_mutate_enemy(self):
monsterT = MyGame.Example.Monster.MonsterT()
monsterT.hp = 200
self.monsterT.enemy = monsterT
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Enemy().Hp(), 200)
def test_mutate_testnestedflatbuffer(self):
self.monsterT.testnestedflatbuffer = [8, 2, 4]
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testnestedflatbuffer(0), 8)
self.assertEqual(monster.Testnestedflatbuffer(1), 2)
self.assertEqual(monster.Testnestedflatbuffer(2), 4)
def test_empty_testnestedflatbuffer(self):
self.monsterT.testnestedflatbuffer = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.TestnestedflatbufferIsNone())
def test_mutate_testbool(self):
self.monsterT.testbool = True
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertTrue(monster.Testbool())
def test_mutate_testhashes(self):
self.monsterT.testhashs32Fnv1 = 1
self.monsterT.testhashu32Fnv1 = 2
self.monsterT.testhashs64Fnv1 = 3
self.monsterT.testhashu64Fnv1 = 4
self.monsterT.testhashs32Fnv1a = 5
self.monsterT.testhashu32Fnv1a = 6
self.monsterT.testhashs64Fnv1a = 7
self.monsterT.testhashu64Fnv1a = 8
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testhashs32Fnv1(), 1)
self.assertEqual(monster.Testhashu32Fnv1(), 2)
self.assertEqual(monster.Testhashs64Fnv1(), 3)
self.assertEqual(monster.Testhashu64Fnv1(), 4)
self.assertEqual(monster.Testhashs32Fnv1a(), 5)
self.assertEqual(monster.Testhashu32Fnv1a(), 6)
self.assertEqual(monster.Testhashs64Fnv1a(), 7)
self.assertEqual(monster.Testhashu64Fnv1a(), 8)
def test_mutate_testarrayofbools(self):
self.monsterT.testarrayofbools = []
self.monsterT.testarrayofbools.append(True)
self.monsterT.testarrayofbools.append(True)
self.monsterT.testarrayofbools.append(False)
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testarrayofbools(0), True)
self.assertEqual(monster.Testarrayofbools(1), True)
self.assertEqual(monster.Testarrayofbools(2), False)
def test_empty_testarrayofbools(self):
self.monsterT.testarrayofbools = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.TestarrayofboolsIsNone())
def test_mutate_testf(self):
self.monsterT.testf = 2.0
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.Testf(), 2.0)
def test_mutate_vectoroflongs(self):
self.monsterT.vectorOfLongs = []
self.monsterT.vectorOfLongs.append(1)
self.monsterT.vectorOfLongs.append(100)
self.monsterT.vectorOfLongs.append(10000)
self.monsterT.vectorOfLongs.append(1000000)
self.monsterT.vectorOfLongs.append(100000000)
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.VectorOfLongs(0), 1)
self.assertEqual(monster.VectorOfLongs(1), 100)
self.assertEqual(monster.VectorOfLongs(2), 10000)
self.assertEqual(monster.VectorOfLongs(3), 1000000)
self.assertEqual(monster.VectorOfLongs(4), 100000000)
def test_empty_vectoroflongs(self):
self.monsterT.vectorOfLongs = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.VectorOfLongsIsNone())
def test_mutate_vectorofdoubles(self):
self.monsterT.vectorOfDoubles = []
self.monsterT.vectorOfDoubles.append(-1.7976931348623157e+308)
self.monsterT.vectorOfDoubles.append(0)
self.monsterT.vectorOfDoubles.append(1.7976931348623157e+308)
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.VectorOfDoubles(0), -1.7976931348623157e+308)
self.assertEqual(monster.VectorOfDoubles(1), 0)
self.assertEqual(monster.VectorOfDoubles(2), 1.7976931348623157e+308)
def test_empty_vectorofdoubles(self):
self.monsterT.vectorOfDoubles = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.VectorOfDoublesIsNone())
def test_mutate_parentnamespacetest(self):
self.monsterT.parentNamespaceTest = MyGame.InParentNamespace.InParentNamespaceT()
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertTrue(isinstance(monster.ParentNamespaceTest(),
MyGame.InParentNamespace.InParentNamespace))
def test_mutate_vectorofEnums(self):
self.monsterT.vectorOfEnums = []
self.monsterT.vectorOfEnums.append(MyGame.Example.Color.Color.Red)
self.monsterT.vectorOfEnums.append(MyGame.Example.Color.Color.Blue)
self.monsterT.vectorOfEnums.append(MyGame.Example.Color.Color.Red)
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertEqual(monster.VectorOfEnums(0),
MyGame.Example.Color.Color.Red)
self.assertEqual(monster.VectorOfEnums(1),
MyGame.Example.Color.Color.Blue)
self.assertEqual(monster.VectorOfEnums(2),
MyGame.Example.Color.Color.Red)
def test_empty_vectorofEnums(self):
self.monsterT.vectorOfEnums = []
monster = self._pack_and_load_buf_class(self.monsterT)
self.assertFalse(monster.VectorOfEnumsIsNone())
def CheckReadBuffer(buf, offset, sizePrefix=False, file_identifier=None):
''' CheckReadBuffer checks that the given buffer is evaluated correctly
as the example Monster. '''
def asserter(stmt):
''' An assertion helper that is separated from TestCase classes. '''
if not stmt:
raise AssertionError('CheckReadBuffer case failed')
if file_identifier:
# test prior to removal of size_prefix
asserter(util.GetBufferIdentifier(buf, offset, size_prefixed=sizePrefix) == file_identifier)
asserter(util.BufferHasIdentifier(buf, offset, file_identifier=file_identifier, size_prefixed=sizePrefix))
asserter(MyGame.Example.Monster.Monster.MonsterBufferHasIdentifier(buf, offset, size_prefixed=sizePrefix))
if sizePrefix:
size = util.GetSizePrefix(buf, offset)
asserter(size == len(buf[offset:])-4)
buf, offset = util.RemoveSizePrefix(buf, offset)
if file_identifier:
asserter(MyGame.Example.Monster.Monster.MonsterBufferHasIdentifier(buf, offset))
else:
asserter(not MyGame.Example.Monster.Monster.MonsterBufferHasIdentifier(buf, offset))
monster = MyGame.Example.Monster.Monster.GetRootAsMonster(buf, offset)
asserter(monster.Hp() == 80)
asserter(monster.Mana() == 150)
asserter(monster.Name() == b'MyMonster')
# initialize a Vec3 from Pos()
vec = monster.Pos()
asserter(vec is not None)
# verify the properties of the Vec3
asserter(vec.X() == 1.0)
asserter(vec.Y() == 2.0)
asserter(vec.Z() == 3.0)
asserter(vec.Test1() == 3.0)
asserter(vec.Test2() == 2)
# initialize a Test from Test3(...)
t = MyGame.Example.Test.Test()
t = vec.Test3(t)
asserter(t is not None)
# verify the properties of the Test
asserter(t.A() == 5)
asserter(t.B() == 6)
# verify that the enum code matches the enum declaration:
union_type = MyGame.Example.Any.Any
asserter(monster.TestType() == union_type.Monster)
# initialize a Table from a union field Test(...)
table2 = monster.Test()
asserter(type(table2) is flatbuffers.table.Table)
# initialize a Monster from the Table from the union
monster2 = MyGame.Example.Monster.Monster()
monster2.Init(table2.Bytes, table2.Pos)
asserter(monster2.Name() == b"Fred")
# iterate through the first monster's inventory:
asserter(monster.InventoryLength() == 5)
asserter(not monster.InventoryIsNone())
invsum = 0
for i in compat_range(monster.InventoryLength()):
v = monster.Inventory(i)
invsum += int(v)
asserter(invsum == 10)
for i in range(5):
asserter(monster.VectorOfLongs(i) == 10 ** (i * 2))
asserter(not monster.VectorOfDoublesIsNone())
asserter(([-1.7976931348623157e+308, 0, 1.7976931348623157e+308]
== [monster.VectorOfDoubles(i)
for i in range(monster.VectorOfDoublesLength())]))
try:
imp.find_module('numpy')
# if numpy exists, then we should be able to get the
# vector as a numpy array
import numpy as np
asserter(monster.InventoryAsNumpy().sum() == 10)
asserter(monster.InventoryAsNumpy().dtype == np.dtype('uint8'))
VectorOfLongs = monster.VectorOfLongsAsNumpy()
asserter(VectorOfLongs.dtype == np.dtype('int64'))
for i in range(5):
asserter(VectorOfLongs[i] == 10 ** (i * 2))
VectorOfDoubles = monster.VectorOfDoublesAsNumpy()
asserter(VectorOfDoubles.dtype == np.dtype('float64'))
asserter(VectorOfDoubles[0] == np.finfo('float64').min)
asserter(VectorOfDoubles[1] == 0.0)
asserter(VectorOfDoubles[2] == np.finfo('float64').max)
except ImportError:
# If numpy does not exist, trying to get vector as numpy
# array should raise NumpyRequiredForThisFeature. The way
# assertRaises has been implemented prevents us from
# asserting this error is raised outside of a test case.
pass
asserter(monster.Test4Length() == 2)
asserter(not monster.Test4IsNone())
# create a 'Test' object and populate it:
test0 = monster.Test4(0)
asserter(type(test0) is MyGame.Example.Test.Test)
test1 = monster.Test4(1)
asserter(type(test1) is MyGame.Example.Test.Test)
# the position of test0 and test1 are swapped in monsterdata_java_wire
# and monsterdata_test_wire, so ignore ordering
v0 = test0.A()
v1 = test0.B()
v2 = test1.A()
v3 = test1.B()
sumtest12 = int(v0) + int(v1) + int(v2) + int(v3)
asserter(sumtest12 == 100)
asserter(not monster.TestarrayofstringIsNone())
asserter(monster.TestarrayofstringLength() == 2)
asserter(monster.Testarrayofstring(0) == b"test1")
asserter(monster.Testarrayofstring(1) == b"test2")
asserter(monster.TestarrayoftablesIsNone())
asserter(monster.TestarrayoftablesLength() == 0)
asserter(monster.TestnestedflatbufferIsNone())
asserter(monster.TestnestedflatbufferLength() == 0)
asserter(monster.Testempty() is None)
class TestFuzz(unittest.TestCase):
''' Low level stress/fuzz test: serialize/deserialize a variety of
different kinds of data in different combinations '''
binary_type = compat.binary_types[0] # this will always exist
ofInt32Bytes = binary_type([0x83, 0x33, 0x33, 0x33])
ofInt64Bytes = binary_type([0x84, 0x44, 0x44, 0x44,
0x44, 0x44, 0x44, 0x44])
overflowingInt32Val = flatbuffers.encode.Get(flatbuffers.packer.int32,
ofInt32Bytes, 0)
overflowingInt64Val = flatbuffers.encode.Get(flatbuffers.packer.int64,
ofInt64Bytes, 0)
# Values we're testing against: chosen to ensure no bits get chopped
# off anywhere, and also be different from eachother.
boolVal = True
int8Val = N.Int8Flags.py_type(-127) # 0x81
uint8Val = N.Uint8Flags.py_type(0xFF)
int16Val = N.Int16Flags.py_type(-32222) # 0x8222
uint16Val = N.Uint16Flags.py_type(0xFEEE)
int32Val = N.Int32Flags.py_type(overflowingInt32Val)
uint32Val = N.Uint32Flags.py_type(0xFDDDDDDD)
int64Val = N.Int64Flags.py_type(overflowingInt64Val)
uint64Val = N.Uint64Flags.py_type(0xFCCCCCCCCCCCCCCC)
# Python uses doubles, so force it here
float32Val = N.Float32Flags.py_type(ctypes.c_float(3.14159).value)
float64Val = N.Float64Flags.py_type(3.14159265359)
def test_fuzz(self):
return self.check_once(11, 100)
def check_once(self, fuzzFields, fuzzObjects):
testValuesMax = 11 # hardcoded to the number of scalar types
builder = flatbuffers.Builder(0)
l = LCG()
objects = [0 for _ in compat_range(fuzzObjects)]
# Generate fuzzObjects random objects each consisting of
# fuzzFields fields, each of a random type.
for i in compat_range(fuzzObjects):
builder.StartObject(fuzzFields)
for j in compat_range(fuzzFields):
choice = int(l.Next()) % testValuesMax
if choice == 0:
builder.PrependBoolSlot(int(j), self.boolVal, False)
elif choice == 1:
builder.PrependInt8Slot(int(j), self.int8Val, 0)
elif choice == 2:
builder.PrependUint8Slot(int(j), self.uint8Val, 0)
elif choice == 3:
builder.PrependInt16Slot(int(j), self.int16Val, 0)
elif choice == 4:
builder.PrependUint16Slot(int(j), self.uint16Val, 0)
elif choice == 5:
builder.PrependInt32Slot(int(j), self.int32Val, 0)
elif choice == 6:
builder.PrependUint32Slot(int(j), self.uint32Val, 0)
elif choice == 7:
builder.PrependInt64Slot(int(j), self.int64Val, 0)
elif choice == 8:
builder.PrependUint64Slot(int(j), self.uint64Val, 0)
elif choice == 9:
builder.PrependFloat32Slot(int(j), self.float32Val, 0)
elif choice == 10:
builder.PrependFloat64Slot(int(j), self.float64Val, 0)
else:
raise RuntimeError('unreachable')
off = builder.EndObject()
# store the offset from the end of the builder buffer,
# since it will keep growing:
objects[i] = off
# Do some bookkeeping to generate stats on fuzzes:
stats = defaultdict(int)
def check(table, desc, want, got):
stats[desc] += 1
self.assertEqual(want, got, "%s != %s, %s" % (want, got, desc))
l = LCG() # Reset.
# Test that all objects we generated are readable and return the
# expected values. We generate random objects in the same order
# so this is deterministic.
for i in compat_range(fuzzObjects):
table = flatbuffers.table.Table(builder.Bytes,
len(builder.Bytes) - objects[i])
for j in compat_range(fuzzFields):
field_count = flatbuffers.builder.VtableMetadataFields + j
f = N.VOffsetTFlags.py_type(field_count *
N.VOffsetTFlags.bytewidth)
choice = int(l.Next()) % testValuesMax
if choice == 0:
check(table, "bool", self.boolVal,
table.GetSlot(f, False, N.BoolFlags))
elif choice == 1:
check(table, "int8", self.int8Val,
table.GetSlot(f, 0, N.Int8Flags))
elif choice == 2:
check(table, "uint8", self.uint8Val,
table.GetSlot(f, 0, N.Uint8Flags))
elif choice == 3:
check(table, "int16", self.int16Val,
table.GetSlot(f, 0, N.Int16Flags))
elif choice == 4:
check(table, "uint16", self.uint16Val,
table.GetSlot(f, 0, N.Uint16Flags))
elif choice == 5:
check(table, "int32", self.int32Val,
table.GetSlot(f, 0, N.Int32Flags))
elif choice == 6:
check(table, "uint32", self.uint32Val,
table.GetSlot(f, 0, N.Uint32Flags))
elif choice == 7:
check(table, "int64", self.int64Val,
table.GetSlot(f, 0, N.Int64Flags))
elif choice == 8:
check(table, "uint64", self.uint64Val,
table.GetSlot(f, 0, N.Uint64Flags))
elif choice == 9:
check(table, "float32", self.float32Val,
table.GetSlot(f, 0, N.Float32Flags))
elif choice == 10:
check(table, "float64", self.float64Val,
table.GetSlot(f, 0, N.Float64Flags))
else:
raise RuntimeError('unreachable')
# If enough checks were made, verify that all scalar types were used:
self.assertEqual(testValuesMax, len(stats),
"fuzzing failed to test all scalar types: %s" % stats)
class TestByteLayout(unittest.TestCase):
''' TestByteLayout checks the bytes of a Builder in various scenarios. '''
def assertBuilderEquals(self, builder, want_chars_or_ints):
def integerize(x):
if isinstance(x, compat.string_types):
return ord(x)
return x
want_ints = list(map(integerize, want_chars_or_ints))
want = bytearray(want_ints)
got = builder.Bytes[builder.Head():] # use the buffer directly
self.assertEqual(want, got)
def test_numbers(self):
b = flatbuffers.Builder(0)
self.assertBuilderEquals(b, [])
b.PrependBool(True)
self.assertBuilderEquals(b, [1])
b.PrependInt8(-127)
self.assertBuilderEquals(b, [129, 1])
b.PrependUint8(255)
self.assertBuilderEquals(b, [255, 129, 1])
b.PrependInt16(-32222)
self.assertBuilderEquals(b, [0x22, 0x82, 0, 255, 129, 1]) # first pad
b.PrependUint16(0xFEEE)
# no pad this time:
self.assertBuilderEquals(b, [0xEE, 0xFE, 0x22, 0x82, 0, 255, 129, 1])
b.PrependInt32(-53687092)
self.assertBuilderEquals(b, [204, 204, 204, 252, 0xEE, 0xFE,
0x22, 0x82, 0, 255, 129, 1])
b.PrependUint32(0x98765432)
self.assertBuilderEquals(b, [0x32, 0x54, 0x76, 0x98,
204, 204, 204, 252,
0xEE, 0xFE, 0x22, 0x82,
0, 255, 129, 1])
def test_numbers64(self):
b = flatbuffers.Builder(0)
b.PrependUint64(0x1122334455667788)
self.assertBuilderEquals(b, [0x88, 0x77, 0x66, 0x55,
0x44, 0x33, 0x22, 0x11])
b = flatbuffers.Builder(0)
b.PrependInt64(0x1122334455667788)
self.assertBuilderEquals(b, [0x88, 0x77, 0x66, 0x55,
0x44, 0x33, 0x22, 0x11])
def test_1xbyte_vector(self):
b = flatbuffers.Builder(0)
self.assertBuilderEquals(b, [])
b.StartVector(flatbuffers.number_types.Uint8Flags.bytewidth, 1, 1)
self.assertBuilderEquals(b, [0, 0, 0]) # align to 4bytes
b.PrependByte(1)
self.assertBuilderEquals(b, [1, 0, 0, 0])
b.EndVector()
self.assertBuilderEquals(b, [1, 0, 0, 0, 1, 0, 0, 0]) # padding
def test_2xbyte_vector(self):
b = flatbuffers.Builder(0)
b.StartVector(flatbuffers.number_types.Uint8Flags.bytewidth, 2, 1)
self.assertBuilderEquals(b, [0, 0]) # align to 4bytes
b.PrependByte(1)
self.assertBuilderEquals(b, [1, 0, 0])
b.PrependByte(2)
self.assertBuilderEquals(b, [2, 1, 0, 0])
b.EndVector()
self.assertBuilderEquals(b, [2, 0, 0, 0, 2, 1, 0, 0]) # padding
def test_1xuint16_vector(self):
b = flatbuffers.Builder(0)
b.StartVector(flatbuffers.number_types.Uint16Flags.bytewidth, 1, 1)
self.assertBuilderEquals(b, [0, 0]) # align to 4bytes
b.PrependUint16(1)
self.assertBuilderEquals(b, [1, 0, 0, 0])
b.EndVector()
self.assertBuilderEquals(b, [1, 0, 0, 0, 1, 0, 0, 0]) # padding
def test_2xuint16_vector(self):
b = flatbuffers.Builder(0)
b.StartVector(flatbuffers.number_types.Uint16Flags.bytewidth, 2, 1)
self.assertBuilderEquals(b, []) # align to 4bytes
b.PrependUint16(0xABCD)
self.assertBuilderEquals(b, [0xCD, 0xAB])
b.PrependUint16(0xDCBA)
self.assertBuilderEquals(b, [0xBA, 0xDC, 0xCD, 0xAB])
b.EndVector()
self.assertBuilderEquals(b, [2, 0, 0, 0, 0xBA, 0xDC, 0xCD, 0xAB])
def test_create_ascii_string(self):
b = flatbuffers.Builder(0)
b.CreateString(u"foo", encoding='ascii')
# 0-terminated, no pad:
self.assertBuilderEquals(b, [3, 0, 0, 0, 'f', 'o', 'o', 0])
b.CreateString(u"moop", encoding='ascii')
# 0-terminated, 3-byte pad:
self.assertBuilderEquals(b, [4, 0, 0, 0, 'm', 'o', 'o', 'p',
0, 0, 0, 0,
3, 0, 0, 0, 'f', 'o', 'o', 0])
def test_create_utf8_string(self):
b = flatbuffers.Builder(0)
b.CreateString(u"Цлїςσδε")
self.assertBuilderEquals(b, "\x0e\x00\x00\x00\xd0\xa6\xd0\xbb\xd1\x97" \
"\xcf\x82\xcf\x83\xce\xb4\xce\xb5\x00\x00")
b.CreateString(u"ﾌﾑｱﾑｶﾓｹﾓ")
self.assertBuilderEquals(b, "\x18\x00\x00\x00\xef\xbe\x8c\xef\xbe\x91" \
"\xef\xbd\xb1\xef\xbe\x91\xef\xbd\xb6\xef\xbe\x93\xef\xbd\xb9\xef" \
"\xbe\x93\x00\x00\x00\x00\x0e\x00\x00\x00\xd0\xa6\xd0\xbb\xd1\x97" \
"\xcf\x82\xcf\x83\xce\xb4\xce\xb5\x00\x00")
def test_create_arbitrary_string(self):
b = flatbuffers.Builder(0)
s = "\x01\x02\x03"
b.CreateString(s) # Default encoding is utf-8.
# 0-terminated, no pad:
self.assertBuilderEquals(b, [3, 0, 0, 0, 1, 2, 3, 0])
s2 = "\x04\x05\x06\x07"
b.CreateString(s2) # Default encoding is utf-8.
# 0-terminated, 3-byte pad:
self.assertBuilderEquals(b, [4, 0, 0, 0, 4, 5, 6, 7, 0, 0, 0, 0,
3, 0, 0, 0, 1, 2, 3, 0])
def test_create_byte_vector(self):
b = flatbuffers.Builder(0)
b.CreateByteVector(b"")
# 0-byte pad:
self.assertBuilderEquals(b, [0, 0, 0, 0])
b = flatbuffers.Builder(0)
b.CreateByteVector(b"\x01\x02\x03")
# 1-byte pad:
self.assertBuilderEquals(b, [3, 0, 0, 0, 1, 2, 3, 0])
def test_create_numpy_vector_int8(self):
try:
imp.find_module('numpy')
# if numpy exists, then we should be able to get the
# vector as a numpy array
import numpy as np
# Systems endian:
b = flatbuffers.Builder(0)
x = np.array([1, 2, -3], dtype=np.int8)
b.CreateNumpyVector(x)
self.assertBuilderEquals(b, [
3, 0, 0, 0, # vector length
1, 2, 256 - 3, 0 # vector value + padding
])
# Reverse endian:
b = flatbuffers.Builder(0)
x_other_endian = x.byteswap().newbyteorder()
b.CreateNumpyVector(x_other_endian)
self.assertBuilderEquals(b, [
3, 0, 0, 0, # vector length
1, 2, 256 - 3, 0 # vector value + padding
])
except ImportError:
b = flatbuffers.Builder(0)
x = 0
assertRaises(
self,
lambda: b.CreateNumpyVector(x),
NumpyRequiredForThisFeature)
def test_create_numpy_vector_uint16(self):
try:
imp.find_module('numpy')
# if numpy exists, then we should be able to get the
# vector as a numpy array
import numpy as np
# Systems endian:
b = flatbuffers.Builder(0)
x = np.array([1, 2, 312], dtype=np.uint16)
b.CreateNumpyVector(x)
self.assertBuilderEquals(b, [
3, 0, 0, 0, # vector length
1, 0, # 1
2, 0, # 2
312 - 256, 1, # 312
0, 0 # padding
])
# Reverse endian:
b = flatbuffers.Builder(0)
x_other_endian = x.byteswap().newbyteorder()
b.CreateNumpyVector(x_other_endian)
self.assertBuilderEquals(b, [
3, 0, 0, 0, # vector length