/*
 * Copyright (c) 2018 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */
/**
 * @file
 * @brief Test stdio module
 */

#include <errno.h>
#include <pcut/pcut.h>
#include <stdio.h>
#include <str.h>
#include <tmpfile.h>
#include <vfs/vfs.h>

PCUT_INIT;

PCUT_TEST_SUITE(stdio);

/** remove function */
PCUT_TEST(remove)
{
	char buf[L_tmpnam];
	char *p;
	FILE *f;
	int rc;

	/* Generate unique file name */
	p = tmpnam(buf);
	PCUT_ASSERT_NOT_NULL(p);

	/* Removing it should fail */
	rc = remove(buf);
	PCUT_ASSERT_TRUE(rc != 0);

	f = fopen(buf, "w");
	PCUT_ASSERT_NOT_NULL(f);
	fclose(f);

	/* Remove for the first time */
	rc = remove(buf);
	PCUT_ASSERT_INT_EQUALS(0, rc);

	/* Should fail the second time */
	rc = remove(buf);
	PCUT_ASSERT_TRUE(rc != 0);
}

/** rename function */
PCUT_TEST(rename)
{
	char buf1[L_tmpnam];
	char buf2[L_tmpnam];
	char *p;
	FILE *f;
	int rc;

	/* Generate first unique file name */
	p = tmpnam(buf1);
	PCUT_ASSERT_NOT_NULL(p);

	/* Generate second unique file name */
	p = tmpnam(buf2);
	PCUT_ASSERT_NOT_NULL(p);

	f = fopen(buf1, "w");
	PCUT_ASSERT_NOT_NULL(f);
	fclose(f);

	/* Rename to the second name */
	rc = rename(buf1, buf2);
	PCUT_ASSERT_INT_EQUALS(0, rc);

	/* First name should no longer exist */
	rc = remove(buf1);
	PCUT_ASSERT_TRUE(rc != 0);

	/* Second can be removed */
	rc = remove(buf2);
	PCUT_ASSERT_INT_EQUALS(0, rc);
}

/** tmpfile function */
PCUT_TEST(tmpfile)
{
	FILE *f;
	char c;
	size_t n;

	f = tmpfile();
	PCUT_ASSERT_NOT_NULL(f);

	c = 'x';
	n = fwrite(&c, sizeof(c), 1, f);
	PCUT_ASSERT_INT_EQUALS(1, n);

	rewind(f);
	c = '\0';
	n = fread(&c, sizeof(c), 1, f);
	PCUT_ASSERT_INT_EQUALS(1, n);
	PCUT_ASSERT_INT_EQUALS('x', c);

	fclose(f);
}

/** tmpnam function with buffer argument */
PCUT_TEST(tmpnam_buf)
{
	char buf[L_tmpnam];
	char *p;
	FILE *f;

	p = tmpnam(buf);
	PCUT_ASSERT_NOT_NULL(p);

	f = fopen(p, "w+");
	PCUT_ASSERT_NOT_NULL(f);
	(void) remove(p);
	fclose(f);
}

/** tmpnam function called twice */
PCUT_TEST(tmpnam_twice)
{
	char buf1[L_tmpnam];
	char buf2[L_tmpnam];
	char *p;

	p = tmpnam(buf1);
	PCUT_ASSERT_NOT_NULL(p);

	p = tmpnam(buf2);
	PCUT_ASSERT_NOT_NULL(p);

	/* We must get two distinct names */
	PCUT_ASSERT_TRUE(str_cmp(buf1, buf2) != 0);
}

/** tmpnam function with NULL argument */
PCUT_TEST(tmpnam_null)
{
	char *p;
	FILE *f;

	p = tmpnam(NULL);
	PCUT_ASSERT_NOT_NULL(p);

	f = fopen(p, "w+");
	PCUT_ASSERT_NOT_NULL(f);
	(void) remove(p);
	fclose(f);
}

/** fgetpos and fsetpos functions */
PCUT_TEST(fgetpos_setpos)
{
	fpos_t pos;
	int rc;
	FILE *f;

	f = tmpfile();
	PCUT_ASSERT_NOT_NULL(f);

	rc = fputs("abc", f);
	PCUT_ASSERT_TRUE(rc >= 0);

	rc = fgetpos(f, &pos);
	PCUT_ASSERT_TRUE(rc >= 0);

	rewind(f);

	rc = fsetpos(f, &pos);
	PCUT_ASSERT_TRUE(rc >= 0);

	(void) fclose(f);
}

/** perror function with NULL as argument */
PCUT_TEST(perror_null_msg)
{
	errno = EINVAL;
	perror(NULL);
}

/** perror function with empty string as argument */
PCUT_TEST(perror_empty_msg)
{
	errno = EINVAL;
	perror("");
}

/** perror function with a message argument */
PCUT_TEST(perror_msg)
{
	errno = EINVAL;
	perror("This is a test");
}

PCUT_EXPORT(stdio);