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| 1 | +#include "utils/fixedptc.h" |
| 2 | +#include <CUnit/CUnit.h> |
| 3 | + |
| 4 | +void test_zero_value(void) { |
| 5 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 6 | + fixedpt zero = 0; |
| 7 | + size_t written; |
| 8 | + |
| 9 | + // Default precision (-1) |
| 10 | + written = fixedpt_str(zero, buf, sizeof(buf), -1); |
| 11 | + CU_ASSERT_STRING_EQUAL(buf, "0.00"); |
| 12 | + CU_ASSERT_EQUAL(written, 4); |
| 13 | + |
| 14 | + // Trim all decimals (-3) |
| 15 | + written = fixedpt_str(zero, buf, sizeof(buf), -3); |
| 16 | + CU_ASSERT_STRING_EQUAL(buf, "0"); |
| 17 | + CU_ASSERT_EQUAL(written, 1); |
| 18 | +} |
| 19 | + |
| 20 | +void test_positive_integers(void) { |
| 21 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 22 | + fixedpt val = 123 << FIXEDPT_FBITS; // 123.0 |
| 23 | + size_t written; |
| 24 | + |
| 25 | + // With 2 decimal places |
| 26 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 27 | + CU_ASSERT_STRING_EQUAL(buf, "123.00"); |
| 28 | + CU_ASSERT_EQUAL(written, 6); |
| 29 | + |
| 30 | + // Trim trailing zeros |
| 31 | + written = fixedpt_str(val, buf, sizeof(buf), -3); |
| 32 | + CU_ASSERT_STRING_EQUAL(buf, "123"); |
| 33 | + CU_ASSERT_EQUAL(written, 3); |
| 34 | +} |
| 35 | + |
| 36 | +void test_negative_numbers(void) { |
| 37 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 38 | + fixedpt val = -(456 << FIXEDPT_FBITS); // -456.0 |
| 39 | + size_t written; |
| 40 | + |
| 41 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 42 | + CU_ASSERT_STRING_EQUAL(buf, "-456.00"); |
| 43 | + CU_ASSERT_EQUAL(written, 7); |
| 44 | +} |
| 45 | + |
| 46 | +void test_exact_fractions(void) { |
| 47 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 48 | + fixedpt val = FIXEDPT_ONE + FIXEDPT_ONE_HALF; // 1.5 |
| 49 | + size_t written; |
| 50 | + |
| 51 | + // Normal precision |
| 52 | + written = fixedpt_str(val, buf, sizeof(buf), 1); |
| 53 | + CU_ASSERT_STRING_EQUAL(buf, "1.5"); |
| 54 | + CU_ASSERT_EQUAL(written, 3); |
| 55 | + |
| 56 | + // Trim zeros |
| 57 | + written = fixedpt_str(val, buf, sizeof(buf), -3); |
| 58 | + CU_ASSERT_STRING_EQUAL(buf, "1.5"); |
| 59 | + CU_ASSERT_EQUAL(written, 3); |
| 60 | +} |
| 61 | + |
| 62 | +void test_buffer_limits(void) { |
| 63 | + char small_buf[5]; |
| 64 | + fixedpt val = (123 << FIXEDPT_FBITS) + FIXEDPT_ONE_HALF; // 123.5 |
| 65 | + size_t written; |
| 66 | + |
| 67 | + // Try to write to tiny buffer |
| 68 | + written = fixedpt_str(val, small_buf, sizeof(small_buf), 2); |
| 69 | + CU_ASSERT_STRING_EQUAL(small_buf, "123"); |
| 70 | + CU_ASSERT_EQUAL(written, 3); |
| 71 | +} |
| 72 | + |
| 73 | +void test_zero_trimming(void) { |
| 74 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 75 | + fixedpt val = (123 << FIXEDPT_FBITS) + (FIXEDPT_ONE / 4); // 123.25 |
| 76 | + size_t written; |
| 77 | + |
| 78 | + // Add extra zeros |
| 79 | + written = fixedpt_str(val, buf, sizeof(buf), 4); |
| 80 | + CU_ASSERT_STRING_EQUAL(buf, "123.2500"); |
| 81 | + CU_ASSERT_EQUAL(written, 8); |
| 82 | + |
| 83 | + // Trim to significant digits |
| 84 | + written = fixedpt_str(val, buf, sizeof(buf), -3); |
| 85 | + CU_ASSERT_STRING_EQUAL(buf, "123.25"); |
| 86 | + CU_ASSERT_EQUAL(written, 6); |
| 87 | +} |
| 88 | + |
| 89 | +void test_max_precision(void) { |
| 90 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 91 | + fixedpt val = FIXEDPT_ONE / 10; // 0.1 |
| 92 | + size_t written; |
| 93 | + |
| 94 | + // Request maximum precision |
| 95 | + written = fixedpt_str(val, buf, sizeof(buf), -2); |
| 96 | + CU_ASSERT_STRING_EQUAL(buf, "0.097656250000000"); |
| 97 | + CU_ASSERT_EQUAL(written, 17); |
| 98 | +} |
| 99 | + |
| 100 | +void test_min_value(void) { |
| 101 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 102 | + fixedpt val = FIXEDPT_MIN; // INT32_MIN >> 8 |
| 103 | + size_t written; |
| 104 | + |
| 105 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 106 | + CU_ASSERT_STRING_EQUAL(buf, "-8388608.00"); |
| 107 | + CU_ASSERT_EQUAL(written, 11); |
| 108 | +} |
| 109 | + |
| 110 | +void test_near_min_value(void) { |
| 111 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 112 | + fixedpt val = FIXEDPT_MIN + (FIXEDPT_ONE / 4); |
| 113 | + size_t written; |
| 114 | + |
| 115 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 116 | + CU_ASSERT_STRING_EQUAL(buf, "-8388607.75"); |
| 117 | + CU_ASSERT_EQUAL(written, 11); |
| 118 | +} |
| 119 | + |
| 120 | +void test_max_value(void) { |
| 121 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 122 | + fixedpt val = FIXEDPT_MAX; // INT32_MAX >> 8 |
| 123 | + size_t written; |
| 124 | + |
| 125 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 126 | + CU_ASSERT_STRING_EQUAL(buf, "8388607.99"); |
| 127 | + CU_ASSERT_EQUAL(written, 10); |
| 128 | +} |
| 129 | + |
| 130 | +void test_near_max_value(void) { |
| 131 | + char buf[FIXEDPT_STR_BUFSIZE]; |
| 132 | + fixedpt val = FIXEDPT_MAX - (FIXEDPT_ONE / 4); |
| 133 | + size_t written; |
| 134 | + |
| 135 | + written = fixedpt_str(val, buf, sizeof(buf), 2); |
| 136 | + CU_ASSERT_STRING_EQUAL(buf, "8388607.74"); |
| 137 | + CU_ASSERT_EQUAL(written, 10); |
| 138 | +} |
| 139 | + |
| 140 | +void fixedpt_str_test_suite(CU_pSuite suite) { |
| 141 | + CU_add_test(suite, "Zero Handling", test_zero_value); |
| 142 | + CU_add_test(suite, "Positive Integers", test_positive_integers); |
| 143 | + CU_add_test(suite, "Negative Numbers", test_negative_numbers); |
| 144 | + CU_add_test(suite, "Exact Fractions", test_exact_fractions); |
| 145 | + CU_add_test(suite, "Buffer Limits", test_buffer_limits); |
| 146 | + CU_add_test(suite, "Zero Trimming", test_zero_trimming); |
| 147 | + CU_add_test(suite, "Max Precision", test_max_precision); |
| 148 | + CU_add_test(suite, "Min Value", test_min_value); |
| 149 | + CU_add_test(suite, "Near Min Value", test_near_min_value); |
| 150 | + CU_add_test(suite, "Max Value", test_max_value); |
| 151 | + CU_add_test(suite, "Near Max Value", test_near_max_value); |
| 152 | +} |
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