import { describe, it, expect } from 'vitest';
import { clampZoom, MIN_ZOOM, MAX_ZOOM } from './panZoom';

describe('clampZoom', () => {
	it('returns the value unchanged when within range', () => {
		expect(clampZoom(1)).toBe(1);
		expect(clampZoom(0.5)).toBe(0.5);
		expect(clampZoom(2.75)).toBe(2.75);
	});

	it('clamps below MIN_ZOOM up to MIN_ZOOM', () => {
		expect(clampZoom(0.1)).toBe(MIN_ZOOM);
		expect(clampZoom(0)).toBe(MIN_ZOOM);
		expect(clampZoom(-5)).toBe(MIN_ZOOM);
	});

	it('clamps above MAX_ZOOM down to MAX_ZOOM', () => {
		expect(clampZoom(5)).toBe(MAX_ZOOM);
		expect(clampZoom(3.0001)).toBe(MAX_ZOOM);
	});

	it('exposes the resolved zoom bounds', () => {
		expect(MIN_ZOOM).toBe(0.25);
		expect(MAX_ZOOM).toBe(3.0);
	});
});