1 // Copyright 2021 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include "pw_bytes/array.h"
16 #include "pw_protobuf/encoder.h"
17 #include "pw_unit_test/framework.h"
18
19 namespace pw::protobuf {
20 namespace {
21
TEST(Encoder,SizeTypeIsConfigured)22 TEST(Encoder, SizeTypeIsConfigured) {
23 static_assert(config::kMaxVarintSize == sizeof(uint8_t));
24 }
25
TEST(Encoder,NestedWriteSmallerThanVarintSize)26 TEST(Encoder, NestedWriteSmallerThanVarintSize) {
27 std::array<std::byte, 256> buffer;
28
29 MemoryEncoder encoder(buffer);
30
31 {
32 StreamEncoder nested = encoder.GetNestedEncoder(1);
33 // 1 byte key + 1 byte size + 125 byte value = 127 byte nested length.
34 EXPECT_EQ(nested.WriteBytes(2, bytes::Initialized<125>(0xaa)), OkStatus());
35 }
36
37 EXPECT_EQ(encoder.status(), OkStatus());
38 }
39
TEST(Encoder,NestedWriteLargerThanVarintSizeReturnsResourceExhausted)40 TEST(Encoder, NestedWriteLargerThanVarintSizeReturnsResourceExhausted) {
41 std::array<std::byte, 256> buffer;
42
43 MemoryEncoder encoder(buffer);
44
45 {
46 // Try to write a larger nested message than the max nested varint value.
47 StreamEncoder nested = encoder.GetNestedEncoder(1);
48 // 1 byte key + 1 byte size + 126 byte value = 128 byte nested length.
49 EXPECT_EQ(nested.WriteBytes(2, bytes::Initialized<126>(0xaa)),
50 Status::ResourceExhausted());
51 EXPECT_EQ(nested.WriteUint32(3, 42), Status::ResourceExhausted());
52 }
53
54 EXPECT_EQ(encoder.status(), Status::ResourceExhausted());
55 }
56
TEST(Encoder,NestedMessageLargerThanVarintSizeReturnsResourceExhausted)57 TEST(Encoder, NestedMessageLargerThanVarintSizeReturnsResourceExhausted) {
58 std::array<std::byte, 256> buffer;
59
60 MemoryEncoder encoder(buffer);
61
62 {
63 // Try to write a larger nested message than the max nested varint value as
64 // multiple smaller writes.
65 StreamEncoder nested = encoder.GetNestedEncoder(1);
66 EXPECT_EQ(nested.WriteBytes(2, bytes::Initialized<60>(0xaa)), OkStatus());
67 EXPECT_EQ(nested.WriteBytes(3, bytes::Initialized<60>(0xaa)), OkStatus());
68 EXPECT_EQ(nested.WriteBytes(4, bytes::Initialized<60>(0xaa)),
69 Status::ResourceExhausted());
70 }
71
72 EXPECT_EQ(encoder.status(), Status::ResourceExhausted());
73 }
74
75 } // namespace
76 } // namespace pw::protobuf
77