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# Copyright 2013 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import sys
import unittest
from mojom.generate import module as mojom
from mojom.generate import pack
class PackTest(unittest.TestCase):
def testOrdinalOrder(self):
struct = mojom.Struct('test')
struct.AddField('testfield1', mojom.INT32, 2)
struct.AddField('testfield2', mojom.INT32, 1)
ps = pack.PackedStruct(struct)
self.assertEqual(2, len(ps.packed_fields))
self.assertEqual('testfield2', ps.packed_fields[0].field.mojom_name)
self.assertEqual('testfield1', ps.packed_fields[1].field.mojom_name)
def testZeroFields(self):
struct = mojom.Struct('test')
ps = pack.PackedStruct(struct)
self.assertEqual(0, len(ps.packed_fields))
def testOneField(self):
struct = mojom.Struct('test')
struct.AddField('testfield1', mojom.INT8)
ps = pack.PackedStruct(struct)
self.assertEqual(1, len(ps.packed_fields))
def _CheckPackSequence(self, kinds, fields, offsets):
"""Checks the pack order and offsets of a sequence of mojom.Kinds.
Args:
kinds: A sequence of mojom.Kinds that specify the fields that are to be
created.
fields: The expected order of the resulting fields, with the integer "1"
first.
offsets: The expected order of offsets, with the integer "0" first.
"""
struct = mojom.Struct('test')
index = 1
for kind in kinds:
struct.AddField('%d' % index, kind)
index += 1
ps = pack.PackedStruct(struct)
num_fields = len(ps.packed_fields)
self.assertEqual(len(kinds), num_fields)
for i in range(num_fields):
self.assertEqual('%d' % fields[i], ps.packed_fields[i].field.mojom_name)
self.assertEqual(offsets[i], ps.packed_fields[i].offset)
def testPaddingPackedInOrder(self):
return self._CheckPackSequence((mojom.INT8, mojom.UINT8, mojom.INT32),
(1, 2, 3), (0, 1, 4))
def testPaddingPackedOutOfOrder(self):
return self._CheckPackSequence((mojom.INT8, mojom.INT32, mojom.UINT8),
(1, 3, 2), (0, 1, 4))
def testPaddingPackedOverflow(self):
kinds = (mojom.INT8, mojom.INT32, mojom.INT16, mojom.INT8, mojom.INT8)
# 2 bytes should be packed together first, followed by short, then by int.
fields = (1, 4, 3, 2, 5)
offsets = (0, 1, 2, 4, 8)
return self._CheckPackSequence(kinds, fields, offsets)
def testNullableTypes(self):
kinds = (mojom.STRING.MakeNullableKind(), mojom.HANDLE.MakeNullableKind(),
mojom.Struct('test_struct').MakeNullableKind(),
mojom.DCPIPE.MakeNullableKind(), mojom.Array().MakeNullableKind(),
mojom.DPPIPE.MakeNullableKind(),
mojom.Array(length=5).MakeNullableKind(),
mojom.MSGPIPE.MakeNullableKind(),
mojom.Interface('test_interface').MakeNullableKind(),
mojom.SHAREDBUFFER.MakeNullableKind(),
mojom.InterfaceRequest().MakeNullableKind())
fields = (1, 2, 4, 3, 5, 6, 8, 7, 9, 10, 11)
offsets = (0, 8, 12, 16, 24, 32, 36, 40, 48, 56, 60)
return self._CheckPackSequence(kinds, fields, offsets)
def testAllTypes(self):
return self._CheckPackSequence(
(mojom.BOOL, mojom.INT8, mojom.STRING, mojom.UINT8, mojom.INT16,
mojom.DOUBLE, mojom.UINT16, mojom.INT32, mojom.UINT32, mojom.INT64,
mojom.FLOAT, mojom.STRING, mojom.HANDLE, mojom.UINT64,
mojom.Struct('test'), mojom.Array(), mojom.STRING.MakeNullableKind()),
(1, 2, 4, 5, 7, 3, 6, 8, 9, 10, 11, 13, 12, 14, 15, 16, 17, 18),
(0, 1, 2, 4, 6, 8, 16, 24, 28, 32, 40, 44, 48, 56, 64, 72, 80, 88))
def testPaddingPackedOutOfOrderByOrdinal(self):
struct = mojom.Struct('test')
struct.AddField('testfield1', mojom.INT8)
struct.AddField('testfield3', mojom.UINT8, 3)
struct.AddField('testfield2', mojom.INT32, 2)
ps = pack.PackedStruct(struct)
self.assertEqual(3, len(ps.packed_fields))
# Second byte should be packed in behind first, altering order.
self.assertEqual('testfield1', ps.packed_fields[0].field.mojom_name)
self.assertEqual('testfield3', ps.packed_fields[1].field.mojom_name)
self.assertEqual('testfield2', ps.packed_fields[2].field.mojom_name)
# Second byte should be packed with first.
self.assertEqual(0, ps.packed_fields[0].offset)
self.assertEqual(1, ps.packed_fields[1].offset)
self.assertEqual(4, ps.packed_fields[2].offset)
def testBools(self):
struct = mojom.Struct('test')
struct.AddField('bit0', mojom.BOOL)
struct.AddField('bit1', mojom.BOOL)
struct.AddField('int', mojom.INT32)
struct.AddField('bit2', mojom.BOOL)
struct.AddField('bit3', mojom.BOOL)
struct.AddField('bit4', mojom.BOOL)
struct.AddField('bit5', mojom.BOOL)
struct.AddField('bit6', mojom.BOOL)
struct.AddField('bit7', mojom.BOOL)
struct.AddField('bit8', mojom.BOOL)
ps = pack.PackedStruct(struct)
self.assertEqual(10, len(ps.packed_fields))
# First 8 bits packed together.
for i in range(8):
pf = ps.packed_fields[i]
self.assertEqual(0, pf.offset)
self.assertEqual("bit%d" % i, pf.field.mojom_name)
self.assertEqual(i, pf.bit)
# Ninth bit goes into second byte.
self.assertEqual("bit8", ps.packed_fields[8].field.mojom_name)
self.assertEqual(1, ps.packed_fields[8].offset)
self.assertEqual(0, ps.packed_fields[8].bit)
# int comes last.
self.assertEqual("int", ps.packed_fields[9].field.mojom_name)
self.assertEqual(4, ps.packed_fields[9].offset)
def testMinVersion(self):
"""Tests that |min_version| is properly set for packed fields."""
struct = mojom.Struct('test')
struct.AddField('field_2', mojom.BOOL, 2)
struct.AddField('field_0', mojom.INT32, 0)
struct.AddField('field_1', mojom.INT64, 1)
ps = pack.PackedStruct(struct)
self.assertEqual('field_0', ps.packed_fields[0].field.mojom_name)
self.assertEqual('field_2', ps.packed_fields[1].field.mojom_name)
self.assertEqual('field_1', ps.packed_fields[2].field.mojom_name)
self.assertEqual(0, ps.packed_fields[0].min_version)
self.assertEqual(0, ps.packed_fields[1].min_version)
self.assertEqual(0, ps.packed_fields[2].min_version)
struct.fields[0].attributes = {'MinVersion': 1}
ps = pack.PackedStruct(struct)
self.assertEqual(0, ps.packed_fields[0].min_version)
self.assertEqual(1, ps.packed_fields[1].min_version)
self.assertEqual(0, ps.packed_fields[2].min_version)
def testGetVersionInfoEmptyStruct(self):
"""Tests that pack.GetVersionInfo() never returns an empty list, even for
empty structs.
"""
struct = mojom.Struct('test')
ps = pack.PackedStruct(struct)
versions = pack.GetVersionInfo(ps)
self.assertEqual(1, len(versions))
self.assertEqual(0, versions[0].version)
self.assertEqual(0, versions[0].num_fields)
self.assertEqual(8, versions[0].num_bytes)
def testGetVersionInfoComplexOrder(self):
"""Tests pack.GetVersionInfo() using a struct whose definition order,
ordinal order and pack order for fields are all different.
"""
struct = mojom.Struct('test')
struct.AddField(
'field_3', mojom.BOOL, ordinal=3, attributes={'MinVersion': 3})
struct.AddField('field_0', mojom.INT32, ordinal=0)
struct.AddField(
'field_1', mojom.INT64, ordinal=1, attributes={'MinVersion': 2})
struct.AddField(
'field_2', mojom.INT64, ordinal=2, attributes={'MinVersion': 3})
ps = pack.PackedStruct(struct)
versions = pack.GetVersionInfo(ps)
self.assertEqual(3, len(versions))
self.assertEqual(0, versions[0].version)
self.assertEqual(1, versions[0].num_fields)
self.assertEqual(16, versions[0].num_bytes)
self.assertEqual(2, versions[1].version)
self.assertEqual(2, versions[1].num_fields)
self.assertEqual(24, versions[1].num_bytes)
self.assertEqual(3, versions[2].version)
self.assertEqual(4, versions[2].num_fields)
self.assertEqual(32, versions[2].num_bytes)
def testGetVersionInfoPackedStruct(self):
"""Tests that pack.GetVersionInfo() correctly sets version, num_fields,
and num_packed_fields for a packed struct.
"""
struct = mojom.Struct('test')
struct.AddField('field_0', mojom.BOOL, ordinal=0)
struct.AddField('field_1',
mojom.NULLABLE_BOOL,
ordinal=1,
attributes={'MinVersion': 1})
struct.AddField('field_2',
mojom.NULLABLE_BOOL,
ordinal=2,
attributes={'MinVersion': 2})
ps = pack.PackedStruct(struct)
versions = pack.GetVersionInfo(ps)
self.assertEqual(3, len(versions))
self.assertEqual(0, versions[0].version)
self.assertEqual(1, versions[1].version)
self.assertEqual(2, versions[2].version)
self.assertEqual(1, versions[0].num_fields)
self.assertEqual(2, versions[1].num_fields)
self.assertEqual(3, versions[2].num_fields)
self.assertEqual(1, versions[0].num_packed_fields)
self.assertEqual(3, versions[1].num_packed_fields)
self.assertEqual(5, versions[2].num_packed_fields)
def testInterfaceAlignment(self):
"""Tests that interfaces are aligned on 4-byte boundaries, although the size
of an interface is 8 bytes.
"""
kinds = (mojom.INT32, mojom.Interface('test_interface'))
fields = (1, 2)
offsets = (0, 4)
self._CheckPackSequence(kinds, fields, offsets)
def testAssociatedInterfaceAlignment(self):
"""Tests that associated interfaces are aligned on 4-byte boundaries,
although the size of an associated interface is 8 bytes.
"""
kinds = (mojom.INT32,
mojom.AssociatedInterface(mojom.Interface('test_interface')))
fields = (1, 2)
offsets = (0, 4)
self._CheckPackSequence(kinds, fields, offsets)
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