1 /*
2 * Copyright (C) 2020 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 <libprotocan/Signal.h>
18
19 #include <gtest/gtest.h>
20
21 namespace android::hardware::automotive::protocan::unittest {
22
TEST(SignalTest,TestGetSingleBytes)23 TEST(SignalTest, TestGetSingleBytes) {
24 can::V1_0::CanMessage msg = {};
25 msg.payload = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
26 for (unsigned i = 0; i < msg.payload.size(); i++) {
27 Signal signal(8 * i, 8);
28 ASSERT_EQ(i, signal.get(msg));
29 }
30 }
31
TEST(SignalTest,TestSetSingleBytes)32 TEST(SignalTest, TestSetSingleBytes) {
33 std::vector<can::V1_0::CanMessage> msgs = {{}, {}, {}};
34 msgs[0].payload = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
35 msgs[1].payload = {0xAB, 0xAB, 0xAB, 0xAB, 0xAB, 0xAB, 0xAB, 0xAB, 0xAB, 0xAB};
36 msgs[2].payload = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
37 for (unsigned i = 0; i < msgs[0].payload.size(); i++) {
38 Signal signal(8 * i, 8);
39
40 for (auto&& msgOriginal : msgs) {
41 auto msgModified = msgOriginal;
42 signal.set(msgModified, 0xBA);
43
44 auto msgExpected = msgOriginal;
45 msgExpected.payload[i] = 0xBA;
46
47 ASSERT_EQ(msgExpected, msgModified) << "i=" << i;
48 }
49 }
50 }
51
TEST(SignalTest,TestGetStart4)52 TEST(SignalTest, TestGetStart4) {
53 /* Data generated with Python3:
54 *
55 * from cantools.database.can import *
56 * hex(Message(1, 'm', 4, [Signal('s', 4, 16, byte_order='little_endian')]).
57 * decode(b'\xde\xad\xbe\xef')['s'])
58 */
59
60 can::V1_0::CanMessage msg = {};
61 msg.payload = {0xDE, 0xAD, 0xBE, 0xEF};
62 can::V1_0::CanMessage msg2 = {};
63 msg2.payload = {0xDE, 0xAD, 0xBE, 0xEF, 0xDE, 0xAD};
64
65 Signal s0_4(0, 4);
66 Signal s4_4(4, 4);
67 Signal s4_8(4, 8);
68 Signal s4_16(4, 16);
69 Signal s4_28(4, 28);
70 Signal s12_8(12, 8);
71 Signal s12_12(12, 12);
72 Signal s12_16(12, 16);
73 Signal s12_20(12, 20);
74 Signal s12_32(12, 32);
75
76 ASSERT_EQ(0xEu, s0_4.get(msg));
77 ASSERT_EQ(0xDu, s4_4.get(msg));
78 ASSERT_EQ(0xDDu, s4_8.get(msg));
79 ASSERT_EQ(0xEADDu, s4_16.get(msg));
80 ASSERT_EQ(0xEFBEADDu, s4_28.get(msg));
81 ASSERT_EQ(0xEAu, s12_8.get(msg));
82 ASSERT_EQ(0xBEAu, s12_12.get(msg));
83 ASSERT_EQ(0xFBEAu, s12_16.get(msg));
84 ASSERT_EQ(0xEFBEAu, s12_20.get(msg));
85 ASSERT_EQ(0xDDEEFBEAu, s12_32.get(msg2));
86 }
87
TEST(SignalTest,TestGet64)88 TEST(SignalTest, TestGet64) {
89 /* Data generated with Python3:
90 *
91 * from cantools.database.can import *
92 * hex(Message(1, 'm', 9, [Signal('s', 4, 64, byte_order='little_endian')]).
93 * decode(b'\xde\xad\xbe\xef\xab\xbc\xcd\xde\xef')['s'])
94 */
95
96 can::V1_0::CanMessage msg = {};
97 msg.payload = {0xDE, 0xAD, 0xBE, 0xEF, 0xAB, 0xBC, 0xCD, 0xDE, 0xEF};
98
99 Signal s0_64(0, 64);
100 Signal s8_64(8, 64);
101 Signal s4_64(4, 64);
102 Signal s1_64(1, 64);
103
104 ASSERT_EQ(0xDECDBCABEFBEADDEu, s0_64.get(msg));
105 ASSERT_EQ(0xEFDECDBCABEFBEADu, s8_64.get(msg));
106 ASSERT_EQ(0xFDECDBCABEFBEADDu, s4_64.get(msg));
107 ASSERT_EQ(0xEF66DE55F7DF56EFu, s1_64.get(msg));
108 }
109
TEST(SignalTest,TestGetAllStarts)110 TEST(SignalTest, TestGetAllStarts) {
111 /* Data generated with Python3:
112 *
113 * from cantools.database.can import *
114 * hex(Message(1, 'm', 6, [Signal('s', 0, 20, byte_order='little_endian')]).
115 * decode(b'\xde\xad\xbe\xef\xde\xad')['s'])
116 */
117
118 std::map<int, Signal::value> shifts = {
119 {0, 0xEADDEu}, {1, 0xF56EFu}, {2, 0xFAB77u}, {3, 0x7D5BBu}, {4, 0xBEADDu}, {5, 0xDF56Eu},
120 {6, 0xEFAB7u}, {7, 0xF7D5Bu}, {8, 0xFBEADu}, {9, 0x7DF56u}, {10, 0xBEFABu}, {11, 0xDF7D5u},
121 };
122
123 can::V1_0::CanMessage msg = {};
124 msg.payload = {0xDE, 0xAD, 0xBE, 0xEF, 0xCC, 0xCC};
125
126 for (auto const& [start, expected] : shifts) {
127 Signal s(start, 20);
128 ASSERT_EQ(expected, s.get(msg)) << "shift of " << start << " failed";
129 }
130 }
131
TEST(SignalTest,TestSetStart4)132 TEST(SignalTest, TestSetStart4) {
133 /* Data generated with Python3:
134 *
135 * from cantools.database.can import *
136 * so=4 ; sl=8
137 * md = Message(1, 'm', 4, [Signal('a1', 0, so), Signal('a2', so+sl, 32-so-sl),
138 * Signal('s', so, sl, byte_order='little_endian')])
139 * m = md.decode(b'\xcc\xcc\xcc\xcc')
140 * m['s'] = 0xDE
141 * binascii.hexlify(md.encode(m)).upper()
142 */
143 typedef struct {
144 int start;
145 int length;
146 Signal::value setValue;
147 hidl_vec<uint8_t> payload;
148 } case_t;
149
150 std::vector<case_t> cases = {
151 {0, 4, 0xDu, {0xCD, 0xCC, 0xCC, 0xCC}}, {4, 4, 0xDu, {0xDC, 0xCC, 0xCC, 0xCC}},
152 {4, 8, 0xDEu, {0xEC, 0xCD, 0xCC, 0xCC}}, {4, 16, 0xDEADu, {0xDC, 0xEA, 0xCD, 0xCC}},
153 {4, 24, 0xDEADBEu, {0xEC, 0xDB, 0xEA, 0xCD}}, {4, 28, 0xDEADBEEu, {0xEC, 0xBE, 0xAD, 0xDE}},
154 {12, 8, 0xDEu, {0xCC, 0xEC, 0xCD, 0xCC}}, {12, 12, 0xDEAu, {0xCC, 0xAC, 0xDE, 0xCC}},
155 {12, 16, 0xDEADu, {0xCC, 0xDC, 0xEA, 0xCD}}, {12, 20, 0xDEADBu, {0xCC, 0xBC, 0xAD, 0xDE}},
156 };
157
158 can::V1_0::CanMessage msg = {};
159 msg.payload = {0xCC, 0xCC, 0xCC, 0xCC};
160
161 for (auto const& tcase : cases) {
162 Signal s(tcase.start, tcase.length);
163
164 can::V1_0::CanMessage expectedMsg = {};
165 expectedMsg.payload = tcase.payload;
166
167 can::V1_0::CanMessage editedMsg = msg;
168 s.set(editedMsg, tcase.setValue);
169
170 ASSERT_EQ(expectedMsg, editedMsg) << " set(" << tcase.start << ", " << tcase.length << ")";
171 }
172 }
173
TEST(SignalTest,TestSetAllStarts)174 TEST(SignalTest, TestSetAllStarts) {
175 /* Data generated with Python3:
176 * from cantools.database.can import *
177 * import binascii
178 * import textwrap
179 *
180 * length = 20
181 * for start in range(0, 32 - length):
182 * signals = [Signal('s', start, length, byte_order='little_endian')]
183 * if start > 0: signals.append(Signal('a', 0, start, byte_order='little_endian'))
184 * signals.append(Signal('b', start + length, 32 - start - length,
185 * byte_order='little_endian'))
186 *
187 * md = Message(1, 'm', 4, signals)
188 * m = md.decode(b'\xcc\xcc\xcc\xcc')
189 * m['s'] = 0xDEADB
190 * out = binascii.hexlify(md.encode(m)).decode('ascii').upper()
191 * out = ', '.join(['0x{}'.format(v) for v in textwrap.wrap(out, 2)])
192 * print('{{ {:d}, {{ {:s} }}}},'.format(start, out))
193 */
194
195 std::map<int, hidl_vec<uint8_t>> shifts = {
196 {0, {0xDB, 0xEA, 0xCD, 0xCC}}, {1, {0xB6, 0xD5, 0xDB, 0xCC}}, {2, {0x6C, 0xAB, 0xF7, 0xCC}},
197 {3, {0xDC, 0x56, 0xEF, 0xCC}}, {4, {0xBC, 0xAD, 0xDE, 0xCC}}, {5, {0x6C, 0x5B, 0xBD, 0xCD}},
198 {6, {0xCC, 0xB6, 0x7A, 0xCF}}, {7, {0xCC, 0x6D, 0xF5, 0xCE}}, {8, {0xCC, 0xDB, 0xEA, 0xCD}},
199 {9, {0xCC, 0xB6, 0xD5, 0xDB}}, {10, {0xCC, 0x6C, 0xAB, 0xF7}}, {11, {0xCC, 0xDC, 0x56, 0xEF}},
200 };
201
202 can::V1_0::CanMessage msg = {};
203 msg.payload = {0xCC, 0xCC, 0xCC, 0xCC};
204
205 for (auto const& [start, expectedPayload] : shifts) {
206 Signal s(start, 20);
207
208 can::V1_0::CanMessage expectedMsg = {};
209 expectedMsg.payload = expectedPayload;
210
211 can::V1_0::CanMessage editedMsg = msg;
212 s.set(editedMsg, 0xDEADB);
213
214 ASSERT_EQ(expectedMsg, editedMsg) << "shift of " << start << " failed";
215 }
216 }
217
218 } // namespace android::hardware::automotive::protocan::unittest
219