sfptostr.c revision 290001 
1/*
2 * This file contains test for both fptoa and fptoms (which uses dofptoa),
3 * since all these functions are very similar.
4 */
5#include "config.h"
6#include "ntp_fp.h"
7#include "unity.h"
8
9#define SFP_MAX_PRECISION 6
10
11void test_PositiveInteger(void);
12void test_NegativeInteger(void);
13void test_PositiveIntegerPositiveFraction(void);
14void test_NegativeIntegerNegativeFraction(void);
15void test_PositiveIntegerNegativeFraction(void);
16void test_NegativeIntegerPositiveFraction(void);
17void test_SingleDecimalInteger(void);
18void test_SingleDecimalRounding(void);
19
20
21void test_PositiveInteger(void)
22{
23	s_fp test = 300 << 16; // exact 300.000000
24
25	TEST_ASSERT_EQUAL_STRING("300.000000", fptoa(test, SFP_MAX_PRECISION));
26	TEST_ASSERT_EQUAL_STRING("300000.000", fptoms(test, SFP_MAX_PRECISION));
27}
28
29void test_NegativeInteger(void)
30{
31	s_fp test = -200 << 16; // exact -200.000000
32
33	TEST_ASSERT_EQUAL_STRING("-200.000000", fptoa(test, SFP_MAX_PRECISION));
34	TEST_ASSERT_EQUAL_STRING("-200000.000", fptoms(test, SFP_MAX_PRECISION));
35}
36
37void test_PositiveIntegerPositiveFraction(void)
38{
39	s_fp test = (300 << 16) + (1 << 15); // 300 + 0.5
40
41	TEST_ASSERT_EQUAL_STRING("300.500000", fptoa(test, SFP_MAX_PRECISION));
42	TEST_ASSERT_EQUAL_STRING("300500.000", fptoms(test, SFP_MAX_PRECISION));
43}
44
45void test_NegativeIntegerNegativeFraction(void)
46{
47	s_fp test = (-200 << 16) - (1 << 15); // -200 - 0.5
48
49	TEST_ASSERT_EQUAL_STRING("-200.500000", fptoa(test, SFP_MAX_PRECISION));
50	TEST_ASSERT_EQUAL_STRING("-200500.000", fptoms(test, SFP_MAX_PRECISION));
51}
52
53void test_PositiveIntegerNegativeFraction(void)
54{
55	s_fp test = (300 << 16) - (1 << 14); // 300 - 0.25
56
57	TEST_ASSERT_EQUAL_STRING("299.750000", fptoa(test, SFP_MAX_PRECISION));
58	TEST_ASSERT_EQUAL_STRING("299750.000", fptoms(test, SFP_MAX_PRECISION));
59}
60
61void test_NegativeIntegerPositiveFraction(void)
62{
63	s_fp test = (-200 << 16) + (1 << 14)*3; // -200 + 0.75
64
65	TEST_ASSERT_EQUAL_STRING("-199.250000", fptoa(test, SFP_MAX_PRECISION));
66	TEST_ASSERT_EQUAL_STRING("-199250.000", fptoms(test, SFP_MAX_PRECISION));
67}
68
69void test_SingleDecimalInteger(void)
70{
71	s_fp test = 300 << 16; // 300
72
73	TEST_ASSERT_EQUAL_STRING("300.0", fptoa(test, 1));
74	TEST_ASSERT_EQUAL_STRING("300000.0", fptoms(test, 1));
75}
76
77void test_SingleDecimalRounding(void)
78{
79	s_fp test = (2 << 16) + (1 << 14)*3; // 2 + 0.25*3 = 2.75
80
81	TEST_ASSERT_EQUAL_STRING("2.8", fptoa(test, 1));
82	TEST_ASSERT_EQUAL_STRING("2750.0", fptoms(test, 1));
83}
84