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106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/* $NetBSD: lfptostr.c,v 1.1.1.2 2015/07/10 13:11:14 christos Exp $ */
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/*
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* This file contains test for both mfptoa and mfptoms (which uses dolfptoa),
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* since all these functions are very similar. It also tests ulfptoa, which is
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* a macro.
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*/
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#include "config.h"
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#include "ntp_stdlib.h"
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#include "ntp_calendar.h"
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#include "ntp_fp.h"
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#include "unity.h"
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static const int LFP_MAX_PRECISION = 10;
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static const int LFP_MAX_PRECISION_MS = 7;
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static const int ONE_FOURTH = 1073741824; // (1 << 30)
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static const int HALF = (1 << 31);
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static const int THREE_FOURTH = -1073741824;
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static const int HALF_PROMILLE_UP = 2147484; // slightly more than 0.0005
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static const int HALF_PROMILLE_DOWN = 2147483; // slightly less than 0.0005
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void test_PositiveInteger(void) {
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l_fp test = {200, 0}; // exact 200.0000000000
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TEST_ASSERT_EQUAL_STRING("200.0000000000", mfptoa(test.l_ui, test.l_uf, LFP_MAX_PRECISION));
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TEST_ASSERT_EQUAL_STRING("200000.0000000", mfptoms(test.l_ui, test.l_uf, LFP_MAX_PRECISION_MS));
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}
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void test_NegativeInteger(void) {
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l_fp test = {-100, 0}; // -100
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TEST_ASSERT_EQUAL_STRING("-100.0000000000", lfptoa(&test, LFP_MAX_PRECISION));
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TEST_ASSERT_EQUAL_STRING("-100000.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
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}
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void test_PositiveIntegerWithFraction(void) {
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l_fp test = {200, ONE_FOURTH}; // 200.25
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TEST_ASSERT_EQUAL_STRING("200.2500000000", lfptoa(&test, LFP_MAX_PRECISION));
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TEST_ASSERT_EQUAL_STRING("200250.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
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}
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void test_NegativeIntegerWithFraction(void) {
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l_fp test = {-100, ONE_FOURTH}; // -99.75
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TEST_ASSERT_EQUAL_STRING("-99.7500000000", lfptoa(&test, LFP_MAX_PRECISION));
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TEST_ASSERT_EQUAL_STRING("-99750.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
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}
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void test_RoundingDownToInteger(void) {
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l_fp test = {10, ONE_FOURTH}; // 10.25
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TEST_ASSERT_EQUAL_STRING("10", lfptoa(&test, 0));
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TEST_ASSERT_EQUAL_STRING("10250", lfptoms(&test, 0));
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}
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void test_RoundingMiddleToInteger(void) {
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l_fp test = {10, HALF}; // 10.5
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TEST_ASSERT_EQUAL_STRING("11", lfptoa(&test, 0));
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TEST_ASSERT_EQUAL_STRING("10500", lfptoms(&test, 0));
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}
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void test_RoundingUpToInteger(void) {
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l_fp test = {5, THREE_FOURTH}; // 5.75
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TEST_ASSERT_EQUAL_STRING("6", lfptoa(&test, 0));
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TEST_ASSERT_EQUAL_STRING("5750", lfptoms(&test, 0));
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}
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void test_SingleDecimal(void) {
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l_fp test = {8, ONE_FOURTH}; // 8.25
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TEST_ASSERT_EQUAL_STRING("8.3", lfptoa(&test, 1));
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TEST_ASSERT_EQUAL_STRING("8250.0", lfptoms(&test, 1));
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}
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void test_MillisecondsRoundingUp(void) {
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l_fp test = {1, HALF_PROMILLE_UP}; //slightly more than 1.0005
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TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
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TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
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TEST_ASSERT_EQUAL_STRING("1001", lfptoms(&test, 0));
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}
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void test_MillisecondsRoundingDown(void) {
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l_fp test = {1, HALF_PROMILLE_DOWN}; // slightly less than 1.0005
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TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
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TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
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TEST_ASSERT_EQUAL_STRING("1000", lfptoms(&test, 0));
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}
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void test_UnsignedInteger(void) {
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l_fp test = {3000000000UL, 0};
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TEST_ASSERT_EQUAL_STRING("3000000000.0", ulfptoa(&test, 1));
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}
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