/*-
 * Copyright (c) 2024 Dag-Erling Smørgrav
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <time.h>

#include <atf-c.h>

ATF_TC_WITHOUT_HEAD(dayofweek);
ATF_TC_BODY(dayofweek, tc)
{
        static const struct {
                const char *str;
                int wday;
        } cases[] = {
                { "1582-12-20", 1 },
                { "1700-03-01", 1 },
                { "1752-09-14", 4 },
                { "1800-12-31", 3 },
                { "1801-01-01", 4 },
                { "1900-12-31", 1 },
                { "1901-01-01", 2 },
                { "2000-12-31", 0 },
                { "2001-01-01", 1 },
                { "2100-12-31", 5 },
                { "2101-01-01", 6 },
                { "2200-12-31", 3 },
                { "2201-01-01", 4 },
                { },
        };
        struct tm tm;

        for (unsigned int i = 0; cases[i].str != NULL; i++) {
                if (strptime(cases[i].str, "%Y-%m-%d", &tm) == NULL) {
                        atf_tc_fail_nonfatal("failed to parse %s",
                            cases[i].str);
                } else if (tm.tm_wday != cases[i].wday) {
                        atf_tc_fail_nonfatal("expected %d for %s, got %d",
                            cases[i].wday, cases[i].str, tm.tm_wday);
                }
        }
}

ATF_TP_ADD_TCS(tp)
{
        ATF_TP_ADD_TC(tp, dayofweek);
        return (atf_no_error());
}