include/test/ut.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Simple unit test library
 *
 * Copyright (c) 2013 Google, Inc
 */

#ifndef __TEST_UT_H
#define __TEST_UT_H

#include <linux/err.h>

struct unit_test_state;

/**
 * ut_fail() - Record failure of a unit test
 *
 * @uts: Test state
 * @fname: Filename where the error occurred
 * @line: Line number where the error occurred
 * @func: Function name where the error occurred
 * @cond: The condition that failed
 */
void ut_fail(struct unit_test_state *uts, const char *fname, int line,
	     const char *func, const char *cond);

/**
 * ut_failf() - Record failure of a unit test
 *
 * @uts: Test state
 * @fname: Filename where the error occurred
 * @line: Line number where the error occurred
 * @func: Function name where the error occurred
 * @cond: The condition that failed
 * @fmt: printf() format string for the error, followed by args
 */
void ut_failf(struct unit_test_state *uts, const char *fname, int line,
	      const char *func, const char *cond, const char *fmt, ...)
			__attribute__ ((format (__printf__, 6, 7)));

/**
 * ut_check_console_line() - Check the next console line against expectations
 *
 * This creates a string and then checks it against the next line of console
 * output obtained with console_record_readline().
 *
 * After the function returns, uts->expect_str holds the expected string and
 * uts->actual_str holds the actual string read from the console.
 *
 * @uts: Test state
 * @fmt: printf() format string for the error, followed by args
 * @return 0 if OK, other value on error
 */
int ut_check_console_line(struct unit_test_state *uts, const char *fmt, ...)
			__attribute__ ((format (__printf__, 2, 3)));

/**
 * ut_check_console_end() - Check there is no more console output
 *
 * After the function returns, uts->actual_str holds the actual string read
 * from the console
 *
 * @uts: Test state
 * @return 0 if OK (console has no output), other value on error
 */
int ut_check_console_end(struct unit_test_state *uts);

/**
 * ut_check_console_dump() - Check that next lines have a print_buffer() dump
 *
 * This only supports a byte dump.
 *
 * @total_bytes: Size of the expected dump in bytes`
 * @return 0 if OK (looks like a dump and the length matches), other value on
 *	error
 */
int ut_check_console_dump(struct unit_test_state *uts, int total_bytes);

/* Assert that a condition is non-zero */
#define ut_assert(cond)							\
	if (!(cond)) {							\
		ut_fail(uts, __FILE__, __LINE__, __func__, #cond);	\
		return CMD_RET_FAILURE;					\
	}

/* Assert that a condition is non-zero, with printf() string */
#define ut_assertf(cond, fmt, args...)					\
	if (!(cond)) {							\
		ut_failf(uts, __FILE__, __LINE__, __func__, #cond,	\
			 fmt, ##args);					\
		return CMD_RET_FAILURE;					\
	}

/* Assert that two int expressions are equal */
#define ut_asserteq(expr1, expr2) {					\
	unsigned int _val1 = (expr1), _val2 = (expr2);			\
									\
	if (_val1 != _val2) {						\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr1 " == " #expr2,				\
			 "Expected %#x (%d), got %#x (%d)",		\
			 _val1, _val1, _val2, _val2);			\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that two string expressions are equal */
#define ut_asserteq_str(expr1, expr2) {					\
	const char *_val1 = (expr1), *_val2 = (expr2);			\
									\
	if (strcmp(_val1, _val2)) {					\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr1 " = " #expr2,				\
			 "Expected \"%s\", got \"%s\"", _val1, _val2);	\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that two memory areas are equal */
#define ut_asserteq_mem(expr1, expr2, len) {				\
	const u8 *_val1 = (u8 *)(expr1), *_val2 = (u8 *)(expr2);	\
	const uint __len = len;						\
									\
	if (memcmp(_val1, _val2, __len)) {				\
		char __buf1[64 + 1] = "\0";				\
		char __buf2[64 + 1] = "\0";				\
		bin2hex(__buf1, _val1, min(__len, (uint)32));		\
		bin2hex(__buf2, _val2, min(__len, (uint)32));		\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr1 " = " #expr2,				\
			 "Expected \"%s\", got \"%s\"",			\
			 __buf1, __buf2);				\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that two pointers are equal */
#define ut_asserteq_ptr(expr1, expr2) {					\
	const void *_val1 = (expr1), *_val2 = (expr2);			\
									\
	if (_val1 != _val2) {						\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr1 " = " #expr2,				\
			 "Expected %p, got %p", _val1, _val2);		\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that a pointer is NULL */
#define ut_assertnull(expr) {					\
	const void *_val = (expr);					\
									\
	if (_val) {						\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr " != NULL",				\
			 "Expected NULL, got %p", _val);		\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that a pointer is not NULL */
#define ut_assertnonnull(expr) {					\
	const void *_val = (expr);					\
									\
	if (!_val) {						\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr " = NULL",				\
			 "Expected non-null, got NULL");		\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that a pointer is not an error pointer */
#define ut_assertok_ptr(expr) {						\
	const void *_val = (expr);					\
									\
	if (IS_ERR(_val)) {						\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 #expr " = NULL",				\
			 "Expected pointer, got error %ld",		\
			 PTR_ERR(_val));				\
		return CMD_RET_FAILURE;					\
	}								\
}

/* Assert that an operation succeeds (returns 0) */
#define ut_assertok(cond)	ut_asserteq(0, cond)

/* Assert that the next console output line matches */
#define ut_assert_nextline(fmt, args...)				\
	if (ut_check_console_line(uts, fmt, ##args)) {			\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 "console", "\nExpected '%s',\n     got '%s'",	\
			 uts->expect_str, uts->actual_str);		\
		return CMD_RET_FAILURE;					\
	}								\

/* Assert that there is no more console output */
#define ut_assert_console_end()						\
	if (ut_check_console_end(uts)) {				\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 "console", "Expected no more output, got '%s'",\
			 uts->actual_str);				\
		return CMD_RET_FAILURE;					\
	}								\

/* Assert that the next lines are print_buffer() dump at an address */
#define ut_assert_nextlines_are_dump(total_bytes)			\
	if (ut_check_console_dump(uts, total_bytes)) {			\
		ut_failf(uts, __FILE__, __LINE__, __func__,		\
			 "console",					\
			"Expected dump of length %x bytes, got '%s'",	\
			 total_bytes, uts->actual_str);			\
		return CMD_RET_FAILURE;					\
	}								\

/**
 * ut_check_free() - Return the number of bytes free in the malloc() pool
 *
 * @return bytes free
 */
ulong ut_check_free(void);

/**
 * ut_check_delta() - Return the number of bytes allocated/freed
 *
 * @last: Last value from ut_check_free
 * @return free memory delta from @last; positive means more memory has been
 *	allocated, negative means less has been allocated (i.e. some is freed)
 */
long ut_check_delta(ulong last);

#endif