1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <cstring>
18#include "gtest/gtest.h"
19
20#include "chre/apps/wifi_offload/flatbuffers_serialization.h"
21
22#include "include/utility.h"
23
24using wifi_offload::fbs::Serialize;
25using wifi_offload::fbs::Deserialize;
26
27template <typename TestType>
28class FlatbuffersSerializationTest : public testing::Test {
29 public:
30  // RandomGenerator used to initialize data-types with random values
31  wifi_offload_test::RandomGenerator random_gen_;
32
33  static const size_t kBufferLen = CHRE_MESSAGE_TO_HOST_MAX_SIZE;
34  uint8_t buffer[kBufferLen];
35};
36
37typedef testing::Types<wifi_offload::ScanStats, wifi_offload::ScanConfig,
38                       wifi_offload::Vector<wifi_offload::ScanResult>>
39    Implementations;
40
41TYPED_TEST_CASE(FlatbuffersSerializationTest, Implementations);
42
43TYPED_TEST(FlatbuffersSerializationTest,
44           SerializationWithNullBufferReturnsRequiredBufferSize) {
45  TypeParam test_obj;
46  init(test_obj, this->random_gen_);
47
48  size_t required_buff_size = Serialize(test_obj, nullptr, 0);
49  EXPECT_NE(0, required_buff_size);
50
51  size_t serialized_size = Serialize(test_obj, this->buffer, this->kBufferLen);
52  ASSERT_NE(0, serialized_size);
53
54  EXPECT_EQ(serialized_size, required_buff_size);
55}
56
57TYPED_TEST(FlatbuffersSerializationTest,
58           SerializationThenDeserializationCreatesEqualValue) {
59  TypeParam test_obj;
60  init(test_obj, this->random_gen_);
61
62  size_t serialized_size = Serialize(test_obj, this->buffer, this->kBufferLen);
63  ASSERT_NE(0, serialized_size);
64
65  TypeParam deserialized_obj;
66  ASSERT_TRUE(Deserialize(this->buffer, serialized_size, &deserialized_obj));
67  EXPECT_EQ(test_obj, deserialized_obj);
68}
69
70TYPED_TEST(FlatbuffersSerializationTest, NegativeTestsForSerialization) {
71  TypeParam test_obj;
72  init(test_obj, this->random_gen_);
73
74  EXPECT_EQ(0, Serialize(test_obj, this->buffer, 0));   // zero buffer size
75  EXPECT_EQ(0, Serialize(test_obj, this->buffer, 10));  // buffer too small
76}
77
78TYPED_TEST(FlatbuffersSerializationTest, NegativeTestsForDeserialization) {
79  TypeParam test_obj;
80  init(test_obj, this->random_gen_);
81
82  // The first 4 bytes in the buffer represent the position of the root
83  // table, so corrupting it should force the deserialization to fail.
84  constexpr size_t kRootTableOffsetSize = 4;
85  size_t serialized_size = Serialize(test_obj, this->buffer, this->kBufferLen);
86  ASSERT_GE(serialized_size, kRootTableOffsetSize);
87
88  TypeParam new_obj;
89  EXPECT_FALSE(Deserialize(nullptr, serialized_size, &new_obj));
90  EXPECT_FALSE(Deserialize(this->buffer, 0, &new_obj));
91
92  // Corrupt the root table's offset
93  std::memset(this->buffer, 0xff, kRootTableOffsetSize);
94  EXPECT_FALSE(Deserialize(this->buffer, serialized_size, &new_obj));
95}
96