1 /* 2 * This file contains test for both mfptoa and mfptoms (which uses dolfptoa), 3 * since all these functions are very similar. It also tests ulfptoa, which is 4 * a macro. 5 */ 6 7 #include "config.h" 8 #include "ntp_stdlib.h" 9 #include "ntp_fp.h" 10 11 #include "unity.h" 12 13 static const int LFP_MAX_PRECISION = 10; 14 static const int LFP_MAX_PRECISION_MS = 7; 15 16 static const int ONE_FOURTH = 1073741824; /* (1 << 30) */ 17 static const int HALF = (1 << 31); 18 static const int THREE_FOURTH = -1073741824; 19 static const int HALF_PROMILLE_UP = 2147484; /* slightly more than 0.0005 */ 20 static const int HALF_PROMILLE_DOWN = 2147483; /* slightly less than 0.0005 */ 21 22 23 void setUp(void); 24 void test_PositiveInteger(void); 25 void test_NegativeInteger(void); 26 void test_PositiveIntegerWithFraction(void); 27 void test_NegativeIntegerWithFraction(void); 28 void test_RoundingDownToInteger(void); 29 void test_RoundingMiddleToInteger(void); 30 void test_RoundingUpToInteger(void); 31 void test_SingleDecimal(void); 32 void test_MillisecondsRoundingUp(void); 33 void test_MillisecondsRoundingDown(void); 34 void test_UnsignedInteger(void); 35 36 37 void 38 setUp(void) 39 { 40 init_lib(); 41 42 return; 43 } 44 45 46 void 47 test_PositiveInteger(void) { 48 l_fp test = {{200}, 0}; /* exact 200.0000000000 */ 49 50 TEST_ASSERT_EQUAL_STRING("200.0000000000", mfptoa(test.l_ui, test.l_uf, LFP_MAX_PRECISION)); 51 TEST_ASSERT_EQUAL_STRING("200000.0000000", mfptoms(test.l_ui, test.l_uf, LFP_MAX_PRECISION_MS)); 52 } 53 54 void 55 test_NegativeInteger(void) { 56 l_fp test = {{-100}, 0}; /* -100 */ 57 58 TEST_ASSERT_EQUAL_STRING("-100.0000000000", lfptoa(&test, LFP_MAX_PRECISION)); 59 TEST_ASSERT_EQUAL_STRING("-100000.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); 60 } 61 62 void 63 test_PositiveIntegerWithFraction(void) { 64 l_fp test = {{200}, ONE_FOURTH}; /* 200.25 */ 65 66 TEST_ASSERT_EQUAL_STRING("200.2500000000", lfptoa(&test, LFP_MAX_PRECISION)); 67 TEST_ASSERT_EQUAL_STRING("200250.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); 68 } 69 70 void 71 test_NegativeIntegerWithFraction(void) { 72 l_fp test = {{-100}, ONE_FOURTH}; /* -99.75 */ 73 74 TEST_ASSERT_EQUAL_STRING("-99.7500000000", lfptoa(&test, LFP_MAX_PRECISION)); 75 TEST_ASSERT_EQUAL_STRING("-99750.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); 76 } 77 78 void 79 test_RoundingDownToInteger(void) { 80 l_fp test = {{10}, ONE_FOURTH}; /* 10.25 */ 81 82 TEST_ASSERT_EQUAL_STRING("10", lfptoa(&test, 0)); 83 TEST_ASSERT_EQUAL_STRING("10250", lfptoms(&test, 0)); 84 } 85 86 void 87 test_RoundingMiddleToInteger(void) { 88 l_fp test = {{10}, HALF}; /* 10.5 */ 89 90 TEST_ASSERT_EQUAL_STRING("11", lfptoa(&test, 0)); 91 TEST_ASSERT_EQUAL_STRING("10500", lfptoms(&test, 0)); 92 } 93 94 void 95 test_RoundingUpToInteger(void) { 96 l_fp test = {{5}, THREE_FOURTH}; /* 5.75 */ 97 98 TEST_ASSERT_EQUAL_STRING("6", lfptoa(&test, 0)); 99 TEST_ASSERT_EQUAL_STRING("5750", lfptoms(&test, 0)); 100 } 101 102 void 103 test_SingleDecimal(void) { 104 l_fp test = {{8}, ONE_FOURTH}; /* 8.25 */ 105 106 TEST_ASSERT_EQUAL_STRING("8.3", lfptoa(&test, 1)); 107 TEST_ASSERT_EQUAL_STRING("8250.0", lfptoms(&test, 1)); 108 } 109 110 void 111 test_MillisecondsRoundingUp(void) { 112 l_fp test = {{1}, HALF_PROMILLE_UP}; /* slightly more than 1.0005 */ 113 114 TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1)); 115 116 TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1)); 117 TEST_ASSERT_EQUAL_STRING("1001", lfptoms(&test, 0)); 118 } 119 120 void 121 test_MillisecondsRoundingDown(void) { 122 l_fp test = {{1}, HALF_PROMILLE_DOWN}; /* slightly less than 1.0005 */ 123 124 TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1)); 125 126 TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1)); 127 TEST_ASSERT_EQUAL_STRING("1000", lfptoms(&test, 0)); 128 } 129 130 void test_UnsignedInteger(void) { 131 l_fp test = {{3000000000UL}, 0}; 132 133 TEST_ASSERT_EQUAL_STRING("3000000000.0", ulfptoa(&test, 1)); 134 } 135