1
0
mirror of https://github.com/pevans/erc-c.git synced 2024-07-13 23:30:26 +00:00
erc-c/tests/vm_segment.c

210 lines
5.4 KiB
C

#include <criterion/criterion.h>
#include "vm_segment.h"
static vm_segment *segment;
static int length = 128;
static void
setup()
{
segment = vm_segment_create(length);
}
static void
teardown()
{
vm_segment_free(segment);
}
TestSuite(vm_segment, .init = setup, .fini = teardown);
/* Test(vm_segment, free) */
Test(vm_segment, create) {
int i;
cr_assert_neq(segment, NULL);
cr_assert_eq(segment->size, length);
// Test that the memory chunk itself, plus the read and write
// tables, are all zeroed out.
for (i = 0; i < segment->size; i++) {
cr_assert_eq(segment->memory[i], 0);
cr_assert_eq(segment->read_table[i], NULL);
cr_assert_eq(segment->write_table[i], NULL);
}
}
Test(vm_segment, set) {
int index = 0;
vm_8bit value = 123;
cr_assert_eq(vm_segment_set(segment, index, value), OK);
cr_assert_eq(segment->memory[index], value);
}
Test(vm_segment, get) {
int index = 0;
vm_8bit value = 123;
segment->memory[index] = value;
cr_assert_eq(vm_segment_get(segment, index), value);
}
Test(vm_segment, copy) {
vm_segment *src, *dest;
src = vm_segment_create(length);
dest = vm_segment_create(length);
vm_segment_set(src, 0, 0xDE);
vm_segment_set(src, 1, 0xAD);
vm_segment_set(src, 2, 0xBE);
vm_segment_set(src, 3, 0xEF);
cr_assert_eq(vm_segment_copy(dest, src, 8, 0, 4), OK);
cr_assert_eq(vm_segment_get(dest, 8), 0xDE);
cr_assert_eq(vm_segment_get(dest, 9), 0xAD);
cr_assert_eq(vm_segment_get(dest, 10), 0xBE);
cr_assert_eq(vm_segment_get(dest, 11), 0xEF);
vm_segment_free(src);
vm_segment_free(dest);
}
Test(vm_segment, read_map)
{
// We use some trickery here; I don't want to go to the trouble of
// defining a function for this test, so I am just passing in an
// arbitrary pointer to junk. As long as the garbage-in, garbage-out
// principle holds, we're golden.
cr_assert_eq(vm_segment_read_map(segment, 123, (vm_segment_read_fn)456), OK);
cr_assert_eq(vm_segment_read_map(segment, 321, (vm_segment_read_fn)456), ERR_OOB);
cr_assert_eq(segment->read_table[123], (vm_segment_read_fn)456);
}
Test(vm_segment, write_map)
{
// See the read_map test for more details on the following trickery
cr_assert_eq(vm_segment_write_map(segment, 123, (vm_segment_write_fn)456), OK);
cr_assert_eq(vm_segment_write_map(segment, 321, (vm_segment_write_fn)456), ERR_OOB);
cr_assert_eq(segment->write_table[123], (vm_segment_write_fn)456);
}
static vm_8bit
read_fn(vm_segment *segment, size_t addr, void *_mach)
{
return 222;
}
Test(vm_segment, use_read_map)
{
size_t addr = 123;
vm_segment_set(segment, addr, 111);
cr_assert_eq(vm_segment_get(segment, addr), 111);
vm_segment_read_map(segment, addr, read_fn);
cr_assert_eq(vm_segment_get(segment, addr), 222);
vm_segment_read_map(segment, addr, NULL);
cr_assert_eq(vm_segment_get(segment, addr), 111);
}
void
write_fn(vm_segment *segment, size_t addr, vm_8bit value, void *_mach)
{
segment->memory[addr+1] = value;
}
Test(vm_segment, use_write_map)
{
size_t addr = 123;
vm_segment_set(segment, addr, 111);
cr_assert_eq(vm_segment_get(segment, addr), 111);
cr_assert_neq(vm_segment_get(segment, addr + 1), 111);
vm_segment_write_map(segment, addr, write_fn);
vm_segment_set(segment, addr, 111);
cr_assert_eq(vm_segment_get(segment, addr), 111);
cr_assert_eq(vm_segment_get(segment, addr + 1), 111);
}
Test(vm_segment, copy_buf)
{
vm_8bit buf[] = {1, 2, 3, 4, 5};
vm_segment_copy_buf(segment, buf, 0, 0, 3);
cr_assert_eq(vm_segment_get(segment, 0), 1);
cr_assert_eq(vm_segment_get(segment, 1), 2);
cr_assert_eq(vm_segment_get(segment, 2), 3);
// Note that segments by default are zeroed out, so we can safely
// assume its original values should not be 4 or 5 at these indexes.
cr_assert_neq(vm_segment_get(segment, 3), 4);
cr_assert_neq(vm_segment_get(segment, 4), 5);
}
Test(vm_segment, fread)
{
FILE *stream;
stream = fopen("../data/zero.img", "r");
cr_assert_eq(vm_segment_fread(segment, stream, 0, 123), OK);
}
Test(vm_segment, get16)
{
vm_segment_set(segment, 0, 0x34);
vm_segment_set(segment, 1, 0x12);
cr_assert_eq(vm_segment_get16(segment, 0), 0x1234);
}
Test(vm_segment, set16)
{
vm_segment_set16(segment, 0, 0x2345);
cr_assert_eq(vm_segment_get16(segment, 0), 0x2345);
}
Test(vm_segment, fwrite)
{
FILE *stream;
stream = fopen("../data/zero.img", "r");
vm_segment_fread(segment, stream, 0, 123);
fclose(stream);
stream = fopen("/tmp/zero.img", "w");
cr_assert_eq(vm_segment_fwrite(segment, stream, 0, 123), OK);
fclose(stream);
}
Test(vm_segment, hexdump)
{
vm_segment_set(segment, 0, 'H');
vm_segment_set(segment, 1, 'e');
vm_segment_set(segment, 2, 'l');
vm_segment_set(segment, 3, 'l');
vm_segment_set(segment, 4, 'o');
vm_segment_set(segment, 5, ' ');
vm_segment_set(segment, 6, 'N');
vm_segment_set(segment, 7, 'e');
vm_segment_set(segment, 8, 'r');
vm_segment_set(segment, 9, 'd');
vm_segment_set(segment, 10, 's');
FILE *stream = fopen("/dev/null", "w");
char buf[512];
setvbuf(stream, buf, _IOFBF, BUFSIZ);
vm_segment_hexdump(segment, stream, 0, 16);
cr_assert_str_eq(buf,
"00000000 48 65 6C 6C 6F 20 4E 65 72 64 73 00 00 00 00 00 [Hello Nerds.....]\n");
}