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// basic unit tester for bitarray.h
#ifdef NDEBUG
#error this is not intended to be compiled with assertions off
#endif
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <util/bitarray.h>
// helper for basic construction and destruction, with nothing in-between
static void create_reset(size_t size) {
bitarray_t b = bitarray_new(size);
bitarray_reset(&b);
}
// basic creation of a small array
static void test_create_reset_small(void) { create_reset(10); }
// basic creation of a large array
static void test_create_reset_large(void) { create_reset(1023); }
// setting and unsetting of all bits
static void set_unset(size_t size) {
bitarray_t b = bitarray_new(size);
// set and unset each bit
for (size_t i = 0; i < size; ++i) {
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
bitarray_set(&b, i, true);
for (size_t j = 0; j < size; ++j)
assert(bitarray_get(b, j) == (i == j));
bitarray_set(&b, i, false);
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
}
// try the same in reverse
for (size_t i = size - 1;; --i) {
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
bitarray_set(&b, i, true);
for (size_t j = 0; j < size; ++j)
assert(bitarray_get(b, j) == (i == j));
bitarray_set(&b, i, false);
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
if (i == 0)
break;
}
// a different, arbitrary order of a few bits
static const size_t INDEX[] = {3, 1, 4, 42, 6, 7, 123};
for (size_t i = 0; i < sizeof(INDEX) / sizeof(INDEX[0]); ++i) {
if (INDEX[i] >= size)
continue;
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
bitarray_set(&b, INDEX[i], true);
for (size_t j = 0; j < size; ++j)
assert(bitarray_get(b, j) == (INDEX[i] == j));
bitarray_set(&b, INDEX[i], false);
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
}
bitarray_reset(&b);
}
// set/unset for a small array
static void test_set_unset_small(void) { set_unset(10); }
// set/unset for a large array
static void test_set_unset_large(void) { set_unset(1023); }
// using an 8-bit aligned array
static void test_set_unset_aligned(void) {
set_unset(8);
set_unset(16);
set_unset(64);
set_unset(1024);
set_unset(4096);
set_unset(8192);
}
// reusing an array
static void test_reuse(void) {
size_t size = 10;
bitarray_t b = bitarray_new(size);
// set and unset each bit
for (size_t i = 0; i < size; ++i) {
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
bitarray_set(&b, i, true);
for (size_t j = 0; j < size; ++j)
assert(bitarray_get(b, j) == (i == j));
bitarray_set(&b, i, false);
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
}
bitarray_reset(&b);
// reuse it with a different size
size = 1023;
b = bitarray_new(size);
// set and unset each bit
for (size_t i = 0; i < size; ++i) {
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
bitarray_set(&b, i, true);
for (size_t j = 0; j < size; ++j)
assert(bitarray_get(b, j) == (i == j));
bitarray_set(&b, i, false);
for (size_t j = 0; j < size; ++j)
assert(!bitarray_get(b, j));
}
bitarray_reset(&b);
}
// redundant write to a bit
static void double_set(size_t size, bool value) {
bitarray_t b = bitarray_new(size);
static const size_t index = 7;
assert(!bitarray_get(b, index));
bitarray_set(&b, index, value);
assert(bitarray_get(b, index) == value);
bitarray_set(&b, index, value);
assert(bitarray_get(b, index) == value);
bitarray_reset(&b);
}
// various versions of the above
static void test_double_set_small(void) { double_set(10, true); }
static void test_double_set_large(void) { double_set(1023, true); }
static void test_double_clear_small(void) { double_set(10, false); }
static void test_double_clear_large(void) { double_set(1023, false); }
int main(void) {
#define RUN(t) \
do { \
printf("running test_%s... ", #t); \
fflush(stdout); \
test_##t(); \
printf("OK\n"); \
} while (0)
RUN(create_reset_small);
RUN(create_reset_large);
RUN(set_unset_small);
RUN(set_unset_large);
RUN(set_unset_aligned);
RUN(reuse);
RUN(double_set_small);
RUN(double_set_large);
RUN(double_clear_small);
RUN(double_clear_large);
#undef RUN
return EXIT_SUCCESS;
}
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