import { test } from 'node:test';
import assert from 'node:assert/strict';
import { Camera } from './camera.js';
const close = (a,b) => assert.ok(Math.abs(a-b)<1e-8,`${a} != ${b}`);
test('fit preserves sheet aspect ratio without padding',()=> {
  const c = new Camera({x:0,y:-760,width:1150,height:760},1920,1080);
  close(c.scale,1080/760); close(c.y,1080);
  const center = c.world(960,540); close(center.x,575); close(center.y,-380);
});
test('zoom retains exact world coordinate under cursor',()=> {
  const c = new Camera({x:0,y:-760,width:1150,height:760},1000,800);
  const p = c.world(121,534); c.zoom(3.2,121,534); const q = c.world(121,534);
  close(p.x,q.x); close(p.y,q.y); c.pan(12,-8); const r=c.world(133,526); close(r.x,p.x); close(r.y,p.y);
});
test('zoom is bounded for hostile wheel deltas',()=> {
  const c = new Camera({x:0,y:0,width:100,height:100},1000,800);
  c.zoom(1e30,0,0); close(c.scale,c.fitScale*200);
  c.zoom(1e-30,0,0); close(c.scale,c.fitScale*.05);
});