tvtots.c revision 290001 
1#include "config.h"
2
3#include "lfptest.h"
4#include "timevalops.h"
5
6#include "unity.h"
7
8#include <math.h> /* Required on Solaris for ldexp. */
9
10void test_Seconds(void);
11void test_MicrosecondsRounded(void);
12void test_MicrosecondsExact(void);
13
14void
15test_Seconds(void)
16{
17	struct timeval input = {500, 0}; /* 500.0 s */
18	l_fp expected = {{500}, 0};
19	l_fp actual;
20
21	TVTOTS(&input, &actual);
22
23	TEST_ASSERT_TRUE(IsEqual(expected, actual));
24}
25
26
27void
28test_MicrosecondsRounded(void)
29{
30	/* 0.0005 can not be represented exact in a l_fp structure.
31	 * It would equal to 2147483,648. This means that
32	 * HALF_PROMILLE_UP (which is 2147484) should be
33	 * the correct rounding. */
34
35	struct timeval input = {0, 500}; /* 0.0005 exact */
36	l_fp expected = {{0}, HALF_PROMILLE_UP};
37	l_fp actual;
38
39	TVTOTS(&input, &actual);
40
41	TEST_ASSERT_TRUE(IsEqual(expected, actual));
42}
43
44
45void
46test_MicrosecondsExact(void)
47{
48	/* 0.5 can be represented exact in both l_fp and timeval. */
49	const struct timeval input = {10, 500000}; /* 0.5 exact */
50	const l_fp expected = {{10}, HALF};        /* 0.5 exact */
51	l_fp actual;
52
53	TVTOTS(&input, &actual);
54
55	/* Compare the fractional part with an absolute error given. */
56	TEST_ASSERT_EQUAL_UINT(expected.l_ui, actual.l_ui);
57
58	double expectedDouble, actualDouble;
59	M_LFPTOD(0, expected.l_uf, expectedDouble);
60	M_LFPTOD(0, actual.l_uf, actualDouble);
61
62	/* The error should be less than 0.5 us */
63	TEST_ASSERT_DOUBLE_WITHIN(0.0000005, expectedDouble, actualDouble);
64}
65