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ciabatta/tests/crt.c

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// Framework for testing of the CRT library. This file is supposed to be linked
// to the ciabatta, so there is a possibility that the runtime that the testing
// suite relies on is broken, which is why to decrease the chance of it crashing
// because of that, I minimize that dependency. Therefore this testing suite
// avoids the following:
// - Heap allocations
// - Calls to high-level functions like printf, preferring low-level fwrite instead
// - Calling other CRT functions other than for the purpose of testing them
// Dependencies
#include <stddef.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdarg.h>
#include <stdint.h>
#include <time.h>
// Tested
#include <stdint.h>
#include <limits.h>
#include <ctype.h>
// MEMORY
#define TEST_MEMORY_SIZE 8*1024*1024
static uint8_t test_memory[TEST_MEMORY_SIZE];
static uint64_t test_memory_head = TEST_MEMORY_SIZE;
static void *mem_alloc(uint64_t size) {
if(test_memory_head < size) {
fputs("Out of memory. Can't continue testing!!", stderr);
return NULL;
}
test_memory_head -= size;
return &test_memory[test_memory_head];
}
// RANDOM NUMBER GENERATOR (RNG)
static unsigned long random_seed = 0;
unsigned long random(void) {
random_seed = random_seed * 2147001325 + 715136305;
return 0x31415926 ^ ((random_seed >> 16) + (random_seed << 16));
}
unsigned long random_between(int lo, int hi) {
return (random() % (1+hi - lo)) + lo;
}
// FORMATTING AND IO
static void fprintc(FILE *file, char c) {
fputc(c, file);
}
static void fprints(FILE *file, char *str) {
while(*str != 0) {
fputc(*str++, file);
}
}
static void fprintd(FILE *file, int32_t number, int width) {
if(number < 0) {
fprintc(file, '-');
number = -number;
}
char buffer[20] = {0};
char *str = buffer + sizeof buffer - 1;
do {
*--str = number%10+'0';
number /= 10;
} while(number != 0);
int num_digits = (int)((buffer + sizeof buffer - 1) - str);
int pad_width = width - num_digits;
while(pad_width-- > 0) {
fprintc(file, '0');
}
fprints(file, str);
}
static void fprintu(FILE *file, uint32_t number, int width) {
char buffer[20] = {0};
char *str = buffer + sizeof buffer;
do {
*--str = number%10+'0';
number /= 10;
} while(number != 0);
int num_digits = (int)((buffer + sizeof buffer - 1) - str);
int pad_width = width - num_digits;
while(pad_width-- > 0) {
fprintc(file, '0');
}
fprints(file, str);
}
static void fvprint_fmt(FILE *file, char *fmt, va_list args) {
while(*fmt != 0) {
if(*fmt != '%') {
fprintc(file, *fmt);
}
else {
++fmt;
int width = 0;
while('0' <= *fmt && *fmt <= '9') {
width = 10*width + *fmt-'0';
++fmt;
}
if(*fmt == 'c') {
int ch = va_arg(args, int);
fprintc(file, ch);
}
else if(*fmt == '%') {
fprintc(file, '%');
}
else if(*fmt == 's') {
char *str = va_arg(args, char*);
fprints(file, str);
}
else if(*fmt == 'd') {
int32_t i = va_arg(args, int32_t);
fprintd(file, i, width);
}
else if(*fmt == 'u') {
uint32_t u = va_arg(args, uint32_t);
fprintu(file, u, width);
}
}
++fmt;
}
}
static void fprint_fmt(FILE *file, char *fmt, ...) {
va_list args;
va_start(args, fmt);
fvprint_fmt(file, fmt, args);
va_end(args);
}
static void printc(char c) {
fprintc(stdout, c);
}
static void prints(char *str) {
fprints(stdout, str);
}
static void printd(int32_t number, int width) {
fprintd(stdout, number, width);
}
static void printu(uint32_t number, int width) {
fprintu(stdout, number, width);
}
static void print_fmt(char *fmt, ...) {
va_list args;
va_start(args, fmt);
fvprint_fmt(stdout, fmt, args);
va_end(args);
}
static void sprint_fmt(char *dst, char *fmt, ...) {
va_list args;
va_start(args, fmt);
while(*fmt != 0) {
if(*fmt != '%') {
*dst++ = *fmt;
}
else {
++fmt;
int width = 0;
while('0' <= *fmt && *fmt <= '9') {
width = 10*width + *fmt-'0';
++fmt;
}
if(*fmt == 'c') {
int ch = va_arg(args, int);
*dst++ = ch;
}
else if(*fmt == 's') {
char *str = va_arg(args, char*);
while((*dst++ = *str++));
}
else if(*fmt == 'd') {
int32_t i = va_arg(args, int32_t);
if(i < 0) {
i = -i;
*dst++ = '-';
}
char buffer[20] = {0};
char *str = buffer + sizeof buffer;
do {
*--str = i%10+'0';
i /= 10;
} while(i != 0);
int num_digits = (int)((buffer + sizeof buffer - 1) - str);
int pad_width = width - num_digits;
while(pad_width-- > 0) {
*dst++ = '0';
}
while((*dst++ = *str++));
}
else if(*fmt == 'u') {
uint32_t u = va_arg(args, uint32_t);
char buffer[20] = {0};
char *str = buffer + sizeof buffer;
do {
*--str = u%10+'0';
u /= 10;
} while(u != 0);
int num_digits = (int)((buffer + sizeof buffer - 1) - str);
int pad_width = width - num_digits;
while(pad_width-- > 0) {
*dst++ = '0';
}
while((*dst++ = *str++));
}
}
++fmt;
}
*dst = 0;
va_end(fmt);
}
static void term_color_green() {
prints("\x1b[32m");
}
static void term_color_red() {
prints("\x1b[31m");
}
static void term_color_yellow() {
prints("\x1b[33m");
}
static void term_color_reset() {
prints("\x1b[0m");
}
// TEST SUITE FUNCTIONS
// This stuff is for saving results of tests to be a bit more flexible with printing
// test results
struct Test typedef Test;
struct Test_Feature typedef Test_Feature;
struct Test_Feature {
Test_Feature *next;
char *name;
int test_count;
int success_count;
Test *test_head;
};
struct Test {
Test *next;
char *condition_str;
char *error_msg;
int line;
bool is_succeeded;
};
static Test_Feature *reverse_test_lists(Test_Feature *features_reversed) {
Test_Feature *new_head = NULL;
while(features_reversed != NULL) {
Test_Feature *reversed_next = features_reversed->next;
Test_Feature *new_prev = features_reversed;
new_prev->next = new_head;
new_head = new_prev;
features_reversed = reversed_next;
}
for(Test_Feature *feature = new_head; feature != NULL; feature = feature->next) {
Test *reversed_head = feature->test_head;
Test *head = NULL;
while(reversed_head != NULL) {
Test *reversed_next = reversed_head->next;
Test *head_prev = reversed_head;
head_prev->next = head;
head = head_prev;
reversed_head = reversed_next;
}
feature->test_head = head;
}
return new_head;
}
static void print_test_results(Test_Feature *features) {
prints(":: Printing test results\n");
// Iterate features
int total_test_count = 0;
int total_success_count = 0;
for(Test_Feature *feature = features; feature != NULL; feature = feature->next) {
// Update counters
total_test_count += feature->test_count;
total_success_count += feature->success_count;
// Print feature name
term_color_green();
print_fmt("==> Feature ");
term_color_reset();
print_fmt("%s: (%d/%d)\n", feature->name, feature->success_count, feature->test_count);
if(feature->success_count < feature->test_count) {
int test_index = 0;
for(Test *test = feature->test_head; test != NULL; test = test->next) {
if(!test->is_succeeded) {
term_color_red();
print_fmt(" Test #%d", 1+test_index);
term_color_reset();
print_fmt(" failed (line %d): %s\n", test->line, test->error_msg);
}
test_index += 1;
}
}
}
float success_percentage = (float) total_success_count / (float)total_test_count;
if(success_percentage < 0.5) {
term_color_red();
}
else if(success_percentage != 1.0) {
term_color_yellow();
}
else {
term_color_green();
}
time_t timestamp = time(NULL);
struct tm tm = *localtime(&timestamp);
print_fmt("[%4d-%2d-%2d %2d:%2d:%2d] ", 1900+tm.tm_year, 1+tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
prints("TESTS COMPLETED: ");
printd(total_success_count, 0);
printc('/');
printd(total_test_count, 0);
term_color_reset();
printc('\n');
}
// JUNIT OUTPUT
static void junit_write(char *path, Test_Feature *features) {
FILE *xml = fopen(path, "wb");
// TODO: store tests and failures in an object instead of calculating it like that
int total_test_count = 0;
int total_success_count = 0;
for(Test_Feature *feature = features; feature != NULL; feature = feature->next) {
total_test_count += feature->test_count;
total_success_count += feature->success_count;
}
fprint_fmt(xml, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
fprint_fmt(xml, "<testsuites id=\"0\" name=\"%s\" tests=\"%d\" failures=\"%d\" time=\"0\">\n",
"Ciabatta CRT functions test suite", total_test_count, total_test_count - total_success_count);
int feature_id = 0;
for(Test_Feature *feature = features; feature != NULL; feature = feature->next) {
fprint_fmt(xml, " <testsuite id=\"%d\" name=\"%s\" tests=\"%d\" failures=\"%d\" time=\"0\">\n",
feature_id, feature->name, feature->test_count, feature->test_count - feature->success_count);
int test_id = 0;
for(Test *test = feature->test_head; test != NULL; test = test->next) {
fprint_fmt(xml, " <testcase id=\"%d\" name=\"%s\" time=\"0\">\n",
test_id, test->condition_str);
if(!test->is_succeeded) {
fprint_fmt(xml, " <failure message=\"crt.c(%d): %s\" type=\"ERROR\">\n",
test->line, test->error_msg);
fprint_fmt(xml, " Failure message\n");
fprint_fmt(xml, " </failure>\n");
}
test_id += 1;
fprint_fmt(xml, " </testcase>\n");
}
feature_id += 1;
fprint_fmt(xml, " </testsuite>\n");
}
fprint_fmt(xml, "</testsuites>\n");
fclose(xml);
}
// TEST MACROS
#define XSTR(expr) #expr
#define STR(expr) XSTR(expr)
Test_Feature *current_feature = NULL;
bool junit_output = false;
char *junit_output_path = NULL;
#define JUNIT_START(XML_PATH) \
junit_output = true; \
junit_output_path = XML_PATH
#define JUNIT_END() \
if(junit_output) { \
junit_write(junit_output_path, current_feature); \
}
#define FEATURE_START__(NAME, NUMBER) \
{ \
print_fmt(":: Running tests for %s\n", NAME); \
Test_Feature *feature = mem_alloc(sizeof(Test_Feature)); \
feature->next = current_feature; \
current_feature = feature; \
current_feature->name = NAME; \
current_feature->test_head = NULL; \
current_feature->success_count = 0; \
current_feature->test_count = 0; \
}
#define FEATURE_START_(NAME, NUMBER) \
FEATURE_START__(NAME, NUMBER)
#define FEATURE_START(NAME) \
FEATURE_START_(NAME, __COUNTER__)
#define FEATURE_END()
#define TEST__(EXPR, ERROR_FMT, NUMBER, LINE, ...) \
{ \
Test *test = mem_alloc(sizeof(Test)); \
test->next = current_feature->test_head; \
current_feature->test_head = test; \
current_feature->test_head->condition_str = STR(EXPR); \
current_feature->test_head->is_succeeded = EXPR; \
current_feature->test_head->line = LINE; \
if(current_feature->test_head->is_succeeded) {\
current_feature->success_count += 1; \
}\
else { \
current_feature->test_head->error_msg = mem_alloc(256); \
sprint_fmt(current_feature->test_head->error_msg, ERROR_FMT, __VA_ARGS__); \
}\
current_feature->test_count += 1; \
}
#define TEST_(EXPR, ERROR_MSG, NUMBER, LINE, ...) \
TEST__(EXPR, ERROR_MSG, NUMBER, LINE, __VA_ARGS__)
#define TEST(EXPR, ERROR_MSG, ...) \
TEST_(EXPR, ERROR_MSG, __COUNTER__, __LINE__, __VA_ARGS__)
#define TESTS_PREPARE() \
current_feature = reverse_test_lists(current_feature)
#define TESTS_PRINT_RESULT() \
print_test_results(current_feature)
int main(int argc, char **argv) {
JUNIT_START("test/junit.xml");
FEATURE_START("limits.h");
{
// Check existing of macro definitions
#ifdef BOOL_WIDTH
TEST(BOOL_WIDTH == 8*sizeof(bool), "BOOL_WIDTH isn't correlated with sizeof(bool)");
#else
TEST(false, "The macro BOOL_WIDTH wasn't defined");
#endif
#ifdef CHAR_WIDTH
TEST(CHAR_WIDTH == 8, "CHAR_WIDTH isn't 8");
#else
TEST(false, "The macro CHAR_WIDTH wasn't defined");
#endif
#ifdef CHAR_BIT
TEST(CHAR_BIT == 8, "CHAR_BIT isn't 8");
#else
TEST(false, "The macro CHAR_BIT wasn't defined");
#endif
#ifdef CHAR_MIN
TEST(CHAR_MIN == -128, "CHAR_MIN isn't -128");
#else
TEST(false, "The macro CHAR_MIN wasn't defined");
#endif
#ifdef CHAR_MAX
TEST(CHAR_MAX == 127, "CHAR_MAX isn't 127");
#else
TEST(false, "The macro CHAR_MAX wasn't defined");
#endif
#ifdef MB_LEN_MAX
TEST(true, "");
#else
TEST(false, "The macro MB_LEN_MAX wasn't defined");
#endif
#ifdef SCHAR_WIDTH
TEST(SCHAR_WIDTH == 8, "SCHAR_WIDTH isn't 8");
#else
TEST(false, "The macro SCHAR_WIDTH wasn't defined");
#endif
#ifdef SHRT_WIDTH
TEST(SHRT_WIDTH == 16, "SHRT_WIDTH isn't 16");
#else
TEST(false, "The macro SHRT_WIDTH wasn't defined");
#endif
#ifdef INT_WIDTH
TEST(INT_WIDTH == 32, "INT_WIDTH isn't 32");
#else
TEST(false, "The macro INT_WIDTH wasn't defined");
#endif
#ifdef LONG_WIDTH
TEST(LONG_WIDTH == 32, "LONG_WIDTH isn't 32");
#else
TEST(false, "The macro LONG_WIDTH wasn't defined");
#endif
#ifdef LLONG_WIDTH
TEST(LLONG_WIDTH == 64, "LLONG_WIDTH isn't 64");
#else
TEST(false, "The macro LLONG_WIDTH wasn't defined");
#endif
#ifdef SCHAR_MIN
TEST(SCHAR_MIN == -128, "SCHAR_MIN isn't -128");
#else
TEST(false, "The macro SCHAR_MIN wasn't defined");
#endif
#ifdef SHRT_MIN
TEST(SHRT_MIN == -0x8000, "SHRT_MIN isn't -0x8000");
#else
TEST(false, "The macro SHRT_MIN wasn't defined");
#endif
#ifdef INT_MIN
TEST(INT_MIN == -0x80000000, "INT_MIN isn't -0x80000000");
#else
TEST(false, "The macro INT_MIN wasn't defined");
#endif
#ifdef LONG_MIN
TEST(LONG_MIN == -0x80000000l, "LONG_MIN isn't -0x80000000");
#else
TEST(false, "The macro LONG_MIN wasn't defined");
#endif
#ifdef LLONG_MIN
TEST(LLONG_MIN == -0x8000000000000000ll, "LLONG_MIN isn't -0x8000000000000000");
#else
TEST(false, "The macro LLONG_MIN wasn't defined");
#endif
#ifdef SCHAR_MAX
TEST(SCHAR_MAX == 127, "SCHAR_MAX isn't 127");
#else
TEST(false, "The macro SCHAR_MAX wasn't defined");
#endif
#ifdef SHRT_MAX
TEST(SHRT_MAX == 0x7fff, "SHRT_MAX isn't 0x7fff");
#else
TEST(false, "The macro SHRT_MAX wasn't defined");
#endif
#ifdef INT_MAX
TEST(INT_MAX == 0x7fffffff, "INT_MAX isn't 0x7fffffff");
#else
TEST(false, "The macro INT_MAX wasn't defined");
#endif
#ifdef LONG_MAX
TEST(LONG_MAX == 0x7fffffff, "LONG_MAX isn't 0x7fffffff");
#else
TEST(false, "The macro LONG_MAX wasn't defined");
#endif
#ifdef LLONG_MAX
TEST(LLONG_MAX == 0x7fffffffffffffffll, "LLONG_MAX isn't 0x7fffffffffffffff");
#else
TEST(false, "The macro LLONG_MAX wasn't defined");
#endif
#ifdef UCHAR_WIDTH
TEST(UCHAR_WIDTH == 8, "UCHAR_WIDTH isn't 8");
#else
TEST(false, "The macro UCHAR_WIDTH wasn't defined");
#endif
#ifdef USHRT_WIDTH
TEST(USHRT_WIDTH == 16, "USHRT_WIDTH isn't 16");
#else
TEST(false, "The macro USHRT_WIDTH wasn't defined");
#endif
#ifdef UINT_WIDTH
TEST(UINT_WIDTH == 32, "UINT_WIDTH isn't 32");
#else
TEST(false, "The macro UINT_WIDTH wasn't defined");
#endif
#ifdef ULONG_WIDTH
TEST(ULONG_WIDTH == 32, "ULONG_WIDTH isn't 32");
#else
TEST(false, "The macro ULONG_WIDTH wasn't defined");
#endif
#ifdef ULLONG_WIDTH
TEST(ULLONG_WIDTH == 64, "ULLONG_WIDTH isn't 64");
#else
TEST(false, "The macro ULLONG_WIDTH wasn't defined");
#endif
#ifdef UCHAR_MAX
TEST(UCHAR_MAX == 255, "UCHAR_MAX isn't 255");
#else
TEST(false, "The macro UCHAR_MAX wasn't defined");
#endif
#ifdef USHRT_MAX
TEST(USHRT_MAX == 0xffffu, "USHRT_MAX isn't 0xffff");
#else
TEST(false, "The macro USHRT_MAX wasn't defined");
#endif
#ifdef UINT_MAX
TEST(UINT_MAX == 0xffffffffu, "UINT_MAX isn't 0xffffffff");
#else
TEST(false, "The macro UINT_MAX wasn't defined");
#endif
#ifdef ULONG_MAX
TEST(ULONG_MAX == 0xffffffffu, "ULONG_MAX isn't 0xffffffff");
#else
TEST(false, "The macro ULONG_MAX wasn't defined");
#endif
#ifdef ULLONG_MAX
TEST(ULLONG_MAX == 0xffffffffffffffffull, "ULLONG_MAX isn't 0xffffffffffffffffull");
#else
TEST(false, "The macro ULLONG_MAX wasn't defined");
#endif
#ifdef PTRDIFF_WIDTH
TEST(true, "");
#else
TEST(false, "The macro PTRDIFF_WIDTH isn't defined");
#endif
#ifdef PTRDIFF_MIN
TEST(true, "");
#else
TEST(false, "The macro PTRDIFF_MIN isn't defined");
#endif
#ifdef PTRDIFF_MAX
TEST(true, "");
#else
TEST(false, "The macro PTRDIFF_MAX isn't defined");
#endif
#ifdef SIZE_WIDTH
TEST(true, "");
#else
TEST(false, "The macro SIZE_WIDTH isn't defined");
#endif
#ifdef SIZE_MAX
TEST(true, "");
#else
TEST(false, "The macro SIZE_MAX isn't defined");
#endif
#ifdef SIG_ATOMIC_WIDTH
TEST(true, "");
#else
TEST(false, "The macro SIG_ATOMIC_WIDTH isn't defined");
#endif
#ifdef SIG_ATOMIC_MIN
TEST(true, "");
#else
TEST(false, "The macro SIG_ATOMIC_MIN isn't defined");
#endif
#ifdef SIG_ATOMIC_MAX
TEST(true, "");
#else
TEST(false, "The macro SIG_ATOMIC_MAX isn't defined");
#endif
#ifdef WINT_WIDTH
TEST(true, "");
#else
TEST(false, "The macro WINT_WIDTH isn't defined");
#endif
#ifdef WINT_MIN
TEST(true, "");
#else
TEST(false, "The macro WINT_MIN isn't defined");
#endif
#ifdef WINT_MAX
TEST(true, "");
#else
TEST(false, "The macro WINT_MAX isn't defined");
#endif
#ifdef WCHAR_WIDTH
TEST(true, "");
#else
TEST(false, "The macro WCHAR_WIDTH isn't defined");
#endif
#ifdef WCHAR_MIN
TEST(true, "");
#else
TEST(false, "WCHAR_MIN isn't defined");
#endif
#ifdef WCHAR_MAX
TEST(true, "");
#else
TEST(false, "WCHAR_MAX isn't defined");
#endif
}
FEATURE_END();
FEATURE_START("ctype.h");
{
// Test letters
for(int i = 0; i != 10; ++i) {
int letter = random_between('a', 'z');
TEST(isalpha(letter) != 0, "isalpha('%c') returned false", letter);
TEST(isdigit(letter) == 0, "isdigit('%c') returned true", letter);
}
// Test digits
for(int i = 0; i != 10; ++i) {
int digit = random_between('0', '9');
TEST(isalpha(digit) == 0, "isalpha('%c') returned true", digit);
TEST(isdigit(digit) != 0, "isdigit('%c') returned false", digit);
}
}
FEATURE_END();
FEATURE_START("IO functions (stdio.h)");
{
static int numbers[10] = {0,1,2,3,4,5,6,7,8,9};
// fread/fwrite
{
FILE *file = fopen("test_folder/file", "wb");
TEST(file != NULL, "Created file is NULL");
int cnt_written = fwrite(numbers, sizeof(int), 10, file);
TEST(cnt_written == 10, "fwrite didn't write all 10 objects");
TEST(fclose(file) == 0, "fclose didn't close the file");
TEST(rename("test_folder/file", "test_folder/file2") == 0, "Rename returned 0");
file = fopen("test_folder/file2", "rb");
TEST(file != NULL, "Created file is NULL");
int read_numbers[10];
int cnt_read = fread(numbers, sizeof(int), 10, file);
TEST(cnt_read == 10, "fread didn't read 10 objects");
bool all_ok = true;
for(int i = 0; i != 10; ++i) {
if(read_numbers[i] != numbers[i]) {
all_ok = false;
break;
}
}
TEST(all_ok, "The elements read didn't match the elements written");
TEST(fclose(file) == 0, "fclose didn't close the file");
TEST(remove("test_folder/file2") == 0, "remove didn't remove the file");
}
// Seeking and stuff
{
FILE *file = fopen("test_folder/seek", "wb");
TEST(file != NULL, "Created file is NULL");
TEST(fwrite(numbers, sizeof(int), 10, file) == 10, "fwrite didn't write all 10 objects");
TEST(fflush(file) == 0, "fflush failed");
TEST(fseek(file, 4*sizeof(int), SEEK_SET) == 0, "fseek couldn't seek to offset 4");
int num;
TEST(fread(&num, sizeof(int), 1, file) == 1, "fread didn't read the int");
TEST(num == 4, "Wrong value read at offset 4");
TEST(fseek(file, -4, SEEK_END) == 0, "fseek coudn't seek to the end");
TEST(fread(&num, sizeof(int), 1, file) == 1, "fread didn't read the int");
TEST(num == 9, "Wrong number read");
TEST(fclose(file) == 0, "fclose didn't close the file");
file = fopen("test_folder/seek", "wb");
TEST(file != NULL, "Created file is NULL");
fpos_t nul_pos;
TEST(fgetpos(file, &nul_pos) == 0, "Couldn't get file position");
TEST(fseek(file, 0, SEEK_END) == 0, "Couldn't seek to the end of the file");
long file_size = ftell(file);
TEST(file_size != -1L, "ftell failed");
TEST(fsetpos(file, &nul_pos) == 0, "Couldn't reset file position");
TEST(ftell(file) == 0, "File position reset to wrong spot");
}
// Getchar, ungetchar
{
char str[] = "Hello, world!";
FILE *file = fopen("test_folder/getc", "wb");
TEST(file != NULL, "Created file is NULL");
TEST(fputs(str, file) >= 0, "fputs failed");
TEST(fputc('!', file) == '!', "fputc failed");
TEST(fflush(file) == 0, "fflush failed");
// TEST(fclose(file) == 0, "fclose failed");
file = freopen("test_folder/getc", "rb", file);
TEST(file != NULL, "Reopened file is NULL");
TEST(fgets(str, sizeof str, file) == str, "fgets failed");
TEST(fgetc(file) == '!', "fgetc read the wrong thing");
TEST(ungetc('?', file) == '?', "ungetc failed to put a character");
TEST(fgetc(file) == '?', "Didn't get back the same character that we unget'ed");
TEST(fclose(file) == 0, "fclose failed");
}
}
TESTS_PREPARE();
TESTS_PRINT_RESULT();
JUNIT_END();
return 0;
}
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