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[FreeBSD/releng/10.2.git] / contrib / ntp / tests / libntp / sfptostr.c
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
11 void test_PositiveInteger(void)
12 {
13         s_fp test = 300 << 16; // exact 300.000000
14
15         TEST_ASSERT_EQUAL_STRING("300.000000", fptoa(test, SFP_MAX_PRECISION));
16         TEST_ASSERT_EQUAL_STRING("300000.000", fptoms(test, SFP_MAX_PRECISION));
17 }
18
19 void test_NegativeInteger(void)
20 {
21         s_fp test = -200 << 16; // exact -200.000000
22
23         TEST_ASSERT_EQUAL_STRING("-200.000000", fptoa(test, SFP_MAX_PRECISION));
24         TEST_ASSERT_EQUAL_STRING("-200000.000", fptoms(test, SFP_MAX_PRECISION));
25 }
26
27 void test_PositiveIntegerPositiveFraction(void)
28 {
29         s_fp test = (300 << 16) + (1 << 15); // 300 + 0.5
30
31         TEST_ASSERT_EQUAL_STRING("300.500000", fptoa(test, SFP_MAX_PRECISION));
32         TEST_ASSERT_EQUAL_STRING("300500.000", fptoms(test, SFP_MAX_PRECISION));
33 }
34
35 void test_NegativeIntegerNegativeFraction(void)
36 {
37         s_fp test = (-200 << 16) - (1 << 15); // -200 - 0.5
38
39         TEST_ASSERT_EQUAL_STRING("-200.500000", fptoa(test, SFP_MAX_PRECISION));
40         TEST_ASSERT_EQUAL_STRING("-200500.000", fptoms(test, SFP_MAX_PRECISION));
41 }
42
43 void test_PositiveIntegerNegativeFraction(void)
44 {
45         s_fp test = (300 << 16) - (1 << 14); // 300 - 0.25
46
47         TEST_ASSERT_EQUAL_STRING("299.750000", fptoa(test, SFP_MAX_PRECISION));
48         TEST_ASSERT_EQUAL_STRING("299750.000", fptoms(test, SFP_MAX_PRECISION));
49 }
50
51 void test_NegativeIntegerPositiveFraction(void)
52 {
53         s_fp test = (-200 << 16) + (1 << 14)*3; // -200 + 0.75
54
55         TEST_ASSERT_EQUAL_STRING("-199.250000", fptoa(test, SFP_MAX_PRECISION));
56         TEST_ASSERT_EQUAL_STRING("-199250.000", fptoms(test, SFP_MAX_PRECISION));
57 }
58
59 void test_SingleDecimalInteger(void)
60 {
61         s_fp test = 300 << 16; // 300
62
63         TEST_ASSERT_EQUAL_STRING("300.0", fptoa(test, 1));
64         TEST_ASSERT_EQUAL_STRING("300000.0", fptoms(test, 1));
65 }
66
67 void test_SingleDecimalRounding(void)
68 {
69         s_fp test = (2 << 16) + (1 << 14)*3; // 2 + 0.25*3 = 2.75
70
71         TEST_ASSERT_EQUAL_STRING("2.8", fptoa(test, 1));
72         TEST_ASSERT_EQUAL_STRING("2750.0", fptoms(test, 1));
73 }