From 72ea08f9db07160177afdf92ba8a7f7e1230331a Mon Sep 17 00:00:00 2001 From: Philip Chen Date: Wed, 13 Sep 2017 15:04:37 -0700 Subject: rtc: Add functions and tests for time conversion To implement rtc driver for some ec chips, we need to convert between calandar date and seconds (since epoch time, 01-01-1970 00:00:00). Sicne these functions are HW-independent, let's add common/rtc.c, include/rtc.h, and unit test for this. BUG=b:63908519 BRANCH=none TEST=make buildall test -j Change-Id: Icb1e768d2b3674d5225b83e09475e984eb104d06 Signed-off-by: Philip Chen Reviewed-on: https://chromium-review.googlesource.com/666985 Commit-Ready: Philip Chen Tested-by: Philip Chen Reviewed-by: Shawn N Reviewed-by: Brian Norris --- test/rtc.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 test/rtc.c (limited to 'test/rtc.c') diff --git a/test/rtc.c b/test/rtc.c new file mode 100644 index 0000000000..5d16d3008c --- /dev/null +++ b/test/rtc.c @@ -0,0 +1,104 @@ +/* Copyright 2017 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * Tests for rtc time conversions + */ + +#include "console.h" +#include "common.h" +#include "rtc.h" +#include "test_util.h" +#include "util.h" + +/* Known conversion pairs of date and epoch time. */ +static struct { + struct calendar_date time; + uint32_t sec; +} test_case[] = { + {{8, 3, 1}, 1204329600}, + {{17, 10, 1}, 1506816000}, +}; + +static int calendar_time_comp(struct calendar_date time_1, + struct calendar_date time_2) +{ + return (time_1.year == time_2.year && + time_1.month == time_2.month && + time_1.day == time_2.day); +} + +static int test_time_conversion(void) +{ + struct calendar_date time_1; + struct calendar_date time_2; + uint32_t sec; + int i; + + /* The seconds elapsed from 01-01-1970 to 01-01-2000 */ + sec = SECS_TILL_YEAR_2K; + time_1.year = 0; + time_1.month = 1; + time_1.day = 1; + + /* Test from year 2000 to 2050 */ + for (i = 0; i <= 50; i++) { + /* Test Jan. 1 */ + time_1.year = i; + time_1.month = 1; + time_1.day = 1; + + TEST_ASSERT(date_to_sec(time_1) == sec); + time_2 = sec_to_date(sec); + TEST_ASSERT(calendar_time_comp(time_1, time_2)); + + /* Test the day boundary between Jan. 1 and Jan. 2 */ + time_2 = sec_to_date(sec + SECS_PER_DAY - 1); + TEST_ASSERT(calendar_time_comp(time_1, time_2)); + + time_1.day = 2; + + TEST_ASSERT(date_to_sec(time_1) == sec + SECS_PER_DAY); + time_2 = sec_to_date(sec + SECS_PER_DAY); + TEST_ASSERT(calendar_time_comp(time_1, time_2)); + + /* + * Test the month boundary and leap year: + * Is the 60th day of a year Mar. 1 or Feb. 29? + */ + time_2 = sec_to_date(sec + 59 * SECS_PER_DAY); + if (IS_LEAP_YEAR(i)) + TEST_ASSERT(time_2.month == 2 && time_2.day == 29); + else + TEST_ASSERT(time_2.month == 3 && time_2.day == 1); + + /* Test the year boundary on Dec. 31 */ + sec += SECS_PER_YEAR - (IS_LEAP_YEAR(i) ? 0 : SECS_PER_DAY); + time_1.month = 12; + time_1.day = 31; + + TEST_ASSERT(date_to_sec(time_1) == sec); + time_2 = sec_to_date(sec); + TEST_ASSERT(calendar_time_comp(time_1, time_2)); + + sec += SECS_PER_DAY; + time_2 = sec_to_date(sec - 1); + TEST_ASSERT(calendar_time_comp(time_1, time_2)); + } + + /* Verify known test cases */ + for (i = 0; i < ARRAY_SIZE(test_case); i++) { + TEST_ASSERT(date_to_sec(test_case[i].time) == test_case[i].sec); + time_1 = sec_to_date(test_case[i].sec); + TEST_ASSERT(calendar_time_comp(time_1, test_case[i].time)); + } + + return EC_SUCCESS; +} + +void run_test(void) +{ + RUN_TEST(test_time_conversion); + + test_print_result(); +} -- cgit v1.2.1