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 "ntp_stdlib.h"
8 #include "unity.h"
9
10 #define SFP_MAX_PRECISION 6
11
12 void setUp(void);
13 void test_PositiveInteger(void);
14 void test_NegativeInteger(void);
15 void test_PositiveIntegerPositiveFraction(void);
16 void test_NegativeIntegerNegativeFraction(void);
17 void test_PositiveIntegerNegativeFraction(void);
18 void test_NegativeIntegerPositiveFraction(void);
19 void test_SingleDecimalInteger(void);
20 void test_SingleDecimalRounding(void);
21
22
23 void
setUp(void)24 setUp(void)
25 {
26 init_lib();
27
28 return;
29 }
30
31
test_PositiveInteger(void)32 void test_PositiveInteger(void)
33 {
34 s_fp test = 300 << 16; // exact 300.000000
35
36 TEST_ASSERT_EQUAL_STRING("300.000000", fptoa(test, SFP_MAX_PRECISION));
37 TEST_ASSERT_EQUAL_STRING("300000.000", fptoms(test, SFP_MAX_PRECISION));
38 }
39
test_NegativeInteger(void)40 void test_NegativeInteger(void)
41 {
42 s_fp test = -(200 << 16); // exact -200.000000
43
44 TEST_ASSERT_EQUAL_STRING("-200.000000", fptoa(test, SFP_MAX_PRECISION));
45 TEST_ASSERT_EQUAL_STRING("-200000.000", fptoms(test, SFP_MAX_PRECISION));
46 }
47
test_PositiveIntegerPositiveFraction(void)48 void test_PositiveIntegerPositiveFraction(void)
49 {
50 s_fp test = (300 << 16) + (1 << 15); // 300 + 0.5
51
52 TEST_ASSERT_EQUAL_STRING("300.500000", fptoa(test, SFP_MAX_PRECISION));
53 TEST_ASSERT_EQUAL_STRING("300500.000", fptoms(test, SFP_MAX_PRECISION));
54 }
55
test_NegativeIntegerNegativeFraction(void)56 void test_NegativeIntegerNegativeFraction(void)
57 {
58 s_fp test = -(200 << 16) - (1 << 15); // -200 - 0.5
59
60 TEST_ASSERT_EQUAL_STRING("-200.500000", fptoa(test, SFP_MAX_PRECISION));
61 TEST_ASSERT_EQUAL_STRING("-200500.000", fptoms(test, SFP_MAX_PRECISION));
62 }
63
test_PositiveIntegerNegativeFraction(void)64 void test_PositiveIntegerNegativeFraction(void)
65 {
66 s_fp test = (300 << 16) - (1 << 14); // 300 - 0.25
67
68 TEST_ASSERT_EQUAL_STRING("299.750000", fptoa(test, SFP_MAX_PRECISION));
69 TEST_ASSERT_EQUAL_STRING("299750.000", fptoms(test, SFP_MAX_PRECISION));
70 }
71
test_NegativeIntegerPositiveFraction(void)72 void test_NegativeIntegerPositiveFraction(void)
73 {
74 s_fp test = -(200 << 16) + (1 << 14)*3; // -200 + 0.75
75
76 TEST_ASSERT_EQUAL_STRING("-199.250000", fptoa(test, SFP_MAX_PRECISION));
77 TEST_ASSERT_EQUAL_STRING("-199250.000", fptoms(test, SFP_MAX_PRECISION));
78 }
79
test_SingleDecimalInteger(void)80 void test_SingleDecimalInteger(void)
81 {
82 s_fp test = 300 << 16; // 300
83
84 TEST_ASSERT_EQUAL_STRING("300.0", fptoa(test, 1));
85 TEST_ASSERT_EQUAL_STRING("300000.0", fptoms(test, 1));
86 }
87
test_SingleDecimalRounding(void)88 void test_SingleDecimalRounding(void)
89 {
90 s_fp test = (2 << 16) + (1 << 14)*3; // 2 + 0.25*3 = 2.75
91
92 TEST_ASSERT_EQUAL_STRING("2.8", fptoa(test, 1));
93 TEST_ASSERT_EQUAL_STRING("2750.0", fptoms(test, 1));
94 }
95