/* 
   Unix SMB/CIFS implementation.

   util time testing

   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "torture/torture.h"
#include "torture/local/proto.h"

static bool test_null_time(struct torture_context *tctx)
{
	torture_assert(tctx, null_time(0), "0");
	torture_assert(tctx, null_time(0xFFFFFFFF), "0xFFFFFFFF");
	torture_assert(tctx, null_time(-1), "-1");
	torture_assert(tctx, !null_time(42), "42");
	return true;
}

static bool test_null_nttime(struct torture_context *tctx)
{
	torture_assert(tctx, null_nttime(0), "0");
	torture_assert(tctx, !null_nttime(NTTIME_FREEZE), "-1");
	torture_assert(tctx, !null_nttime(NTTIME_THAW), "-2");
	torture_assert(tctx, !null_nttime(42), "42");
	return true;
}


static bool test_http_timestring(struct torture_context *tctx)
{
	const char *start = "Thu, 01 Jan 1970";
	char *result;
	/*
	 * Correct test for negative UTC offset.  Without the correction, the
	 * test fails when run on hosts with negative UTC offsets, as the date
	 * returned is back in 1969 (pre-epoch).
	 */
	time_t now = time(NULL);
	struct tm local = *localtime(&now);
	struct tm gmt = *gmtime(&now);
	time_t utc_offset = mktime(&local) - mktime(&gmt);

	result = http_timestring(tctx, 42 - (utc_offset < 0 ? utc_offset : 0));
	torture_assert(tctx, !strncmp(start, result, 
				      strlen(start)), result);
	torture_assert_str_equal(tctx, "never", 
				 http_timestring(tctx, get_time_t_max()), "42");
	return true;
}

static bool test_timestring(struct torture_context *tctx)
{
	const char *start = "Thu Jan  1";
	char *result;
	/*
	 * Correct test for negative UTC offset.  Without the correction, the
	 * test fails when run on hosts with negative UTC offsets, as the date
	 * returned is back in 1969 (pre-epoch).
	 */
	time_t now = time(NULL);
	struct tm local = *localtime(&now);
	struct tm gmt = *gmtime(&now);
	time_t utc_offset = mktime(&local) - mktime(&gmt);

	result = timestring(tctx, 42 - (utc_offset < 0 ? utc_offset : 0));
	torture_assert(tctx, !strncmp(start, result, strlen(start)), result);
	return true;
}

static bool test_normalize_timespec(struct torture_context *tctx)
{
	const struct {
		time_t in_s; long in_ns;
		time_t out_s; long out_ns;
	} data [] = {
		  { 0, 0, 0, 0 }
		, { 1, 0, 1, 0 }
		, { -1, 0, -1, 0 }
		, { 0, 1000000000, 1, 0 }
		, { 0, 2000000000, 2, 0 }
		, { 0, 1000000001, 1, 1 }
		, { 0, 2000000001, 2, 1 }
		, { 0, -1000000000, -1, 0 }
		, { 0, -2000000000, -2, 0 }
		, { 0, -1000000001, -2, 999999999 }
		, { 0, -2000000001, -3, 999999999 }
		, { 0, -1, -1, 999999999 }
		, { 1, -1, 0, 999999999 }
		, { -1, -1, -2, 999999999 }
		, { 0, 999999999, 0, 999999999 }
		, { 0, 1999999999, 1, 999999999 }
		, { 0, 2999999999, 2, 999999999 }
		, { 0, -999999999, -1, 1 }
		, { 0, -1999999999, -2, 1 }
		, { 0, -2999999999, -3, 1 }
		, { LONG_MAX, 1000000001, LONG_MAX, 999999999 } /* overflow */
		, { LONG_MAX,  999999999, LONG_MAX, 999999999 } /* harmless */
		, { LONG_MAX, -1, LONG_MAX-1, 999999999 } /* -1 */
		, { LONG_MIN, -1000000001, LONG_MIN, 0 } /* overflow */
		, { LONG_MIN, 0, LONG_MIN, 0 } /* harmless */
		, { LONG_MIN, 1000000000, LONG_MIN+1, 0 } /* +1 */
	};
	int i;

	for (i = 0; i < sizeof(data) / sizeof(data[0]); ++i) {
		struct timespec ts = (struct timespec)
				   { .tv_sec  = data[i].in_s
				   , .tv_nsec = data[i].in_ns };

		normalize_timespec(&ts);

		torture_assert_int_equal(tctx, ts.tv_sec, data[i].out_s,
					 "mismatch in tv_sec");
		torture_assert_int_equal(tctx, ts.tv_nsec, data[i].out_ns,
					 "mismatch in tv_nsec");
	}

	return true;
}

struct torture_suite *torture_local_util_time(TALLOC_CTX *mem_ctx)
{
	struct torture_suite *suite = torture_suite_create(mem_ctx, "time");

	torture_suite_add_simple_test(suite, "null_time", test_null_time);
	torture_suite_add_simple_test(suite, "null_nttime", test_null_nttime);
	torture_suite_add_simple_test(suite, "http_timestring", 
								  test_http_timestring);
	torture_suite_add_simple_test(suite, "timestring", 
								  test_timestring);
	torture_suite_add_simple_test(suite, "normalize_timespec",
				      test_normalize_timespec);

	return suite;
}