#include "hexagon.h"

#include "tap.h"

void dcheck(int x1, int y1, int x2, int y2, int expect) {
	int from, to, dist;
	from = HL_cantor_xy(x1,y1);
	to = HL_cantor_xy(x2,y2);
	dist = HL_distance(from,to);
	ok(dist == expect,
		"distance from (%02d, %02d) to (%02d, %02d) = %d (expect %d)",
		x1, y1, x2, y2, dist, expect);
}

int main(void) {
	plan_tests(8);

	dcheck(1,1,2,1,1);
	dcheck(1,1,2,2,2);
	dcheck(2,2,2,1,1);
	dcheck(1,1,2,3,3);
	dcheck(3,3,3,3,0);
	dcheck(0,0,1,1,1);
	dcheck(-1,-1,1,2,4);
	dcheck(-1,-1,-1,-2,1);

	return exit_status();
}