Alexei Frolov | dea46f7 | 2020-01-07 13:28:24 -0800 | [diff] [blame^] | 1 | // Copyright 2020 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_protobuf/decoder.h" |
| 16 | |
| 17 | #include "gtest/gtest.h" |
| 18 | #include "pw_preprocessor/util.h" |
| 19 | |
| 20 | namespace pw::protobuf { |
| 21 | namespace { |
| 22 | |
| 23 | class TestDecodeHandler : public DecodeHandler { |
| 24 | public: |
| 25 | Status ProcessField(Decoder* decoder, uint32_t field_number) override { |
| 26 | switch (field_number) { |
| 27 | case 1: |
| 28 | decoder->ReadInt32(field_number, &test_int32); |
| 29 | break; |
| 30 | case 2: |
| 31 | decoder->ReadSint32(field_number, &test_sint32); |
| 32 | break; |
| 33 | } |
| 34 | |
| 35 | called = true; |
| 36 | return Status::OK; |
| 37 | } |
| 38 | |
| 39 | bool called = false; |
| 40 | int32_t test_int32 = 0; |
| 41 | int32_t test_sint32 = 0; |
| 42 | }; |
| 43 | |
| 44 | TEST(Decoder, Decode) { |
| 45 | Decoder decoder; |
| 46 | TestDecodeHandler handler; |
| 47 | |
| 48 | // clang-format off |
| 49 | uint8_t encoded_proto[] = { |
| 50 | // type=int32, k=1, v=42 |
| 51 | 0x08, 0x2a, |
| 52 | // type=sint32, k=2, v=-13 |
| 53 | 0x10, 0x19, |
| 54 | // type=bool, k=3, v=false |
| 55 | 0x18, 0x00, |
| 56 | // type=double, k=4, v=3.14159 |
| 57 | 0x21, 0x6e, 0x86, 0x1b, 0xf0, 0xf9, 0x21, 0x09, 0x40, |
| 58 | // type=fixed32, k=5, v=0xdeadbeef |
| 59 | 0x2d, 0xef, 0xbe, 0xad, 0xde, |
| 60 | }; |
| 61 | // clang-format on |
| 62 | |
| 63 | decoder.set_handler(&handler); |
| 64 | EXPECT_EQ(decoder.Decode(as_bytes(span(encoded_proto))), Status::OK); |
| 65 | EXPECT_TRUE(handler.called); |
| 66 | EXPECT_EQ(handler.test_int32, 42); |
| 67 | EXPECT_EQ(handler.test_sint32, -13); |
| 68 | } |
| 69 | |
| 70 | TEST(Decoder, Decode_OverridesDuplicateFields) { |
| 71 | Decoder decoder; |
| 72 | TestDecodeHandler handler; |
| 73 | |
| 74 | // clang-format off |
| 75 | uint8_t encoded_proto[] = { |
| 76 | // type=int32, k=1, v=42 |
| 77 | 0x08, 0x2a, |
| 78 | // type=int32, k=1, v=43 |
| 79 | 0x08, 0x2b, |
| 80 | // type=int32, k=1, v=44 |
| 81 | 0x08, 0x2c, |
| 82 | }; |
| 83 | // clang-format on |
| 84 | |
| 85 | decoder.set_handler(&handler); |
| 86 | EXPECT_EQ(decoder.Decode(as_bytes(span(encoded_proto))), Status::OK); |
| 87 | EXPECT_TRUE(handler.called); |
| 88 | EXPECT_EQ(handler.test_int32, 44); |
| 89 | } |
| 90 | |
| 91 | TEST(Decoder, Decode_Empty) { |
| 92 | Decoder decoder; |
| 93 | TestDecodeHandler handler; |
| 94 | |
| 95 | decoder.set_handler(&handler); |
| 96 | EXPECT_EQ(decoder.Decode(span<std::byte>()), Status::OK); |
| 97 | EXPECT_FALSE(handler.called); |
| 98 | EXPECT_EQ(handler.test_int32, 0); |
| 99 | EXPECT_EQ(handler.test_sint32, 0); |
| 100 | } |
| 101 | |
| 102 | TEST(Decoder, Decode_BadData) { |
| 103 | Decoder decoder; |
| 104 | TestDecodeHandler handler; |
| 105 | |
| 106 | // Field key without a value. |
| 107 | uint8_t encoded_proto[] = {0x08}; |
| 108 | |
| 109 | decoder.set_handler(&handler); |
| 110 | EXPECT_EQ(decoder.Decode(as_bytes(span(encoded_proto))), Status::DATA_LOSS); |
| 111 | } |
| 112 | |
| 113 | // Only processes fields numbered 1 or 3. |
| 114 | class OneThreeDecodeHandler : public DecodeHandler { |
| 115 | public: |
| 116 | Status ProcessField(Decoder* decoder, uint32_t field_number) override { |
| 117 | switch (field_number) { |
| 118 | case 1: |
| 119 | EXPECT_EQ(decoder->ReadInt32(field_number, &field_one), Status::OK); |
| 120 | break; |
| 121 | case 3: |
| 122 | EXPECT_EQ(decoder->ReadInt32(field_number, &field_three), Status::OK); |
| 123 | break; |
| 124 | default: |
| 125 | // Do nothing. |
| 126 | break; |
| 127 | } |
| 128 | |
| 129 | called = true; |
| 130 | return Status::OK; |
| 131 | } |
| 132 | |
| 133 | bool called = false; |
| 134 | int32_t field_one = 0; |
| 135 | int32_t field_three = 0; |
| 136 | }; |
| 137 | |
| 138 | TEST(Decoder, Decode_SkipsUnprocessedFields) { |
| 139 | Decoder decoder; |
| 140 | OneThreeDecodeHandler handler; |
| 141 | |
| 142 | // clang-format off |
| 143 | uint8_t encoded_proto[] = { |
| 144 | // type=int32, k=1, v=42 |
| 145 | // Should be read. |
| 146 | 0x08, 0x2a, |
| 147 | // type=sint32, k=2, v=-13 |
| 148 | // Should be ignored. |
| 149 | 0x10, 0x19, |
| 150 | // type=int32, k=2, v=3 |
| 151 | // Should be ignored. |
| 152 | 0x10, 0x03, |
| 153 | // type=int32, k=3, v=99 |
| 154 | // Should be read. |
| 155 | 0x18, 0x63, |
| 156 | // type=int32, k=4, v=16 |
| 157 | // Should be ignored. |
| 158 | 0x20, 0x10, |
| 159 | }; |
| 160 | // clang-format on |
| 161 | |
| 162 | decoder.set_handler(&handler); |
| 163 | EXPECT_EQ(decoder.Decode(as_bytes(span(encoded_proto))), Status::OK); |
| 164 | EXPECT_TRUE(handler.called); |
| 165 | EXPECT_EQ(handler.field_one, 42); |
| 166 | EXPECT_EQ(handler.field_three, 99); |
| 167 | } |
| 168 | |
| 169 | // Only processes fields numbered 1 or 3. |
| 170 | class ExitOnOneDecoder : public DecodeHandler { |
| 171 | public: |
| 172 | Status ProcessField(Decoder* decoder, uint32_t field_number) override { |
| 173 | switch (field_number) { |
| 174 | case 1: |
| 175 | EXPECT_EQ(decoder->ReadInt32(field_number, &field_one), Status::OK); |
| 176 | return Status::CANCELLED; |
| 177 | case 3: |
| 178 | EXPECT_EQ(decoder->ReadInt32(field_number, &field_three), Status::OK); |
| 179 | break; |
| 180 | default: |
| 181 | // Do nothing. |
| 182 | break; |
| 183 | } |
| 184 | |
| 185 | return Status::OK; |
| 186 | } |
| 187 | |
| 188 | int32_t field_one = 0; |
| 189 | int32_t field_three = 1111; |
| 190 | }; |
| 191 | |
| 192 | TEST(Decoder, Decode_StopsOnNonOkStatus) { |
| 193 | Decoder decoder; |
| 194 | ExitOnOneDecoder handler; |
| 195 | |
| 196 | // clang-format off |
| 197 | uint8_t encoded_proto[] = { |
| 198 | // type=int32, k=1, v=42 |
| 199 | // Should be read. |
| 200 | 0x08, 0x2a, |
| 201 | // type=int32, k=3, v=99 |
| 202 | // Should be skipped. |
| 203 | 0x18, 0x63, |
| 204 | // type=int32, k=2, v=16 |
| 205 | // Should be skipped. |
| 206 | 0x08, 0x10, |
| 207 | }; |
| 208 | // clang-format on |
| 209 | |
| 210 | decoder.set_handler(&handler); |
| 211 | EXPECT_EQ(decoder.Decode(as_bytes(span(encoded_proto))), Status::CANCELLED); |
| 212 | EXPECT_EQ(handler.field_one, 42); |
| 213 | EXPECT_EQ(handler.field_three, 1111); |
| 214 | } |
| 215 | |
| 216 | } // namespace |
| 217 | } // namespace pw::protobuf |