src/test/unit/encoding_unittest.cc

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 #include <stdint.h>
  18
  19 extern "C" {
  20     #include "common/encoding.h"
  21 }
  22
  23 #include "unittest_macros.h"
  24 #include "gtest/gtest.h"
  25
  26 typedef struct zigzagEncodingExpectation_s {
  27     int32_t input;
  28     uint32_t expected;
  29 } zigzagEncodingExpectation_t;
  30
  31 typedef struct floatToIntEncodingExpectation_s {
  32     float input;
  33     uint32_t expected;
  34 } floatToIntEncodingExpectation_t;
  35
  36 TEST(EncodingTest, ZigzagEncodingTest)
  37 {
  38     // given
  39     zigzagEncodingExpectation_t expectations[] = {
  40         { 0, 0},
  41         {-1, 1},
  42         { 1, 2},
  43         {-2, 3},
  44         { 2, 4},
  45
  46         { 2147483646, 4294967292},
  47         {-2147483647, 4294967293},
  48         { 2147483647, 4294967294},
  49         {-2147483648, 4294967295},
  50     };
  51     int expectationCount = sizeof(expectations) / sizeof(expectations[0]);
  52
  53     // expect
  54
  55     for (int i = 0; i < expectationCount; i++) {
  56         zigzagEncodingExpectation_t *expectation = &expectations[i];
  57
  58         EXPECT_EQ(expectation->expected, zigzagEncode(expectation->input));
  59     }
  60 }
  61
  62 TEST(EncodingTest, FloatToIntEncodingTest)
  63 {
  64     // given
  65     floatToIntEncodingExpectation_t expectations[] = {
  66         {0.0, 0x00000000},
  67         {2.0, 0x40000000}, // Exponent should be in the top bits
  68         {4.5, 0x40900000}
  69     };
  70     int expectationCount = sizeof(expectations) / sizeof(expectations[0]);
  71
  72     // expect
  73
  74     for (int i = 0; i < expectationCount; i++) {
  75         floatToIntEncodingExpectation_t *expectation = &expectations[i];
  76
  77         EXPECT_EQ(expectation->expected, castFloatBytesToInt(expectation->input));
  78     }
  79 }
  80
  81 // STUBS
  82
  83 extern "C" {
  84 }