#include "clar_libgit2.h"
#include "varint.h"

void test_encoding__decode(void)
{
	const unsigned char *buf = (unsigned char *)"AB";
	size_t size;

	cl_assert(git_decode_varint(buf, &size) == 65);
	cl_assert(size == 1);

	buf = (unsigned char *)"\xfe\xdc\xbaXY";
	cl_assert(git_decode_varint(buf, &size) == 267869656);
	cl_assert(size == 4);

	buf = (unsigned char *)"\xaa\xaa\xfe\xdc\xbaXY";
	cl_assert(git_decode_varint(buf, &size) == UINT64_C(1489279344088));
	cl_assert(size == 6);

	buf = (unsigned char *)"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xfe\xdc\xbaXY";
	cl_assert(git_decode_varint(buf, &size) == 0);
	cl_assert(size == 0);

}

void test_encoding__encode(void)
{
	unsigned char buf[100];
	cl_assert(git_encode_varint(buf, 100, 65) == 1);
	cl_assert(buf[0] == 'A');

	cl_assert(git_encode_varint(buf, 1, 1) == 1);
	cl_assert(!memcmp(buf, "\x01", 1));

	cl_assert(git_encode_varint(buf, 100, 267869656) == 4);
	cl_assert(!memcmp(buf, "\xfe\xdc\xbaX", 4));

	cl_assert(git_encode_varint(buf, 100, UINT64_C(1489279344088)) == 6);
	cl_assert(!memcmp(buf, "\xaa\xaa\xfe\xdc\xbaX", 6));

	cl_assert(git_encode_varint(buf, 1, UINT64_C(1489279344088)) == -1);
}