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
8 #include "ntp_stdlib.h"
13 static const int LFP_MAX_PRECISION = 10;
14 static const int LFP_MAX_PRECISION_MS = 7;
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 */
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);
47 test_PositiveInteger(void) {
48 l_fp test = {{200}, 0}; /* exact 200.0000000000 */
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));
55 test_NegativeInteger(void) {
56 l_fp test = {{-100}, 0}; /* -100 */
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));
63 test_PositiveIntegerWithFraction(void) {
64 l_fp test = {{200}, ONE_FOURTH}; /* 200.25 */
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));
71 test_NegativeIntegerWithFraction(void) {
72 l_fp test = {{-100}, ONE_FOURTH}; /* -99.75 */
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));
79 test_RoundingDownToInteger(void) {
80 l_fp test = {{10}, ONE_FOURTH}; /* 10.25 */
82 TEST_ASSERT_EQUAL_STRING("10", lfptoa(&test, 0));
83 TEST_ASSERT_EQUAL_STRING("10250", lfptoms(&test, 0));
87 test_RoundingMiddleToInteger(void) {
88 l_fp test = {{10}, HALF}; /* 10.5 */
90 TEST_ASSERT_EQUAL_STRING("11", lfptoa(&test, 0));
91 TEST_ASSERT_EQUAL_STRING("10500", lfptoms(&test, 0));
95 test_RoundingUpToInteger(void) {
96 l_fp test = {{5}, THREE_FOURTH}; /* 5.75 */
98 TEST_ASSERT_EQUAL_STRING("6", lfptoa(&test, 0));
99 TEST_ASSERT_EQUAL_STRING("5750", lfptoms(&test, 0));
103 test_SingleDecimal(void) {
104 l_fp test = {{8}, ONE_FOURTH}; /* 8.25 */
106 TEST_ASSERT_EQUAL_STRING("8.3", lfptoa(&test, 1));
107 TEST_ASSERT_EQUAL_STRING("8250.0", lfptoms(&test, 1));
111 test_MillisecondsRoundingUp(void) {
112 l_fp test = {{1}, HALF_PROMILLE_UP}; /* slightly more than 1.0005 */
114 TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
116 TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
117 TEST_ASSERT_EQUAL_STRING("1001", lfptoms(&test, 0));
121 test_MillisecondsRoundingDown(void) {
122 l_fp test = {{1}, HALF_PROMILLE_DOWN}; /* slightly less than 1.0005 */
124 TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
126 TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
127 TEST_ASSERT_EQUAL_STRING("1000", lfptoms(&test, 0));
130 void test_UnsignedInteger(void) {
131 l_fp test = {{3000000000UL}, 0};
133 TEST_ASSERT_EQUAL_STRING("3000000000.0", ulfptoa(&test, 1));