import test from 'node:test';
import assert from 'node:assert/strict';
import { WarningCollector } from '../warnings.js';
import { warning } from '../validation.js';

test('repeats preserve bounded Unicode messages and snapshots do not alias', () => {
  const collector = new WarningCollector(); const value = { code: 'repeat', message: '雪'.repeat(341), name: 'file' };
  collector.add(value); const before = collector.snapshot();
  for (let i = 0; i < 150; i++) collector.add(value);
  const entries = collector.snapshot(); assert.equal(entries.length, 1); warning(entries[0]);
  assert(Buffer.byteLength(entries[0].message) <= 1024); assert(!entries[0].message.includes('�')); assert.match(entries[0].message, /Repeated 151 times/);
  assert.equal(before[0].message, value.message);
});
test('overflow includes repetitions of the replaced last warning', () => {
  const collector = new WarningCollector();
  for (let i = 0; i < 100; i++) collector.add({ code: `warning_${i}`, message: 'Warning.' });
  collector.add({ code: 'warning_99', message: 'Warning.' });
  collector.add({ code: 'overflow', message: 'Warning.' });
  collector.add({ code: 'warning_99', message: 'Warning.' });
  const entries = collector.snapshot(); assert.equal(entries.length, 100);
  assert.match(entries.at(-1)!.message, /^4 additional/);
  entries.forEach(warning);
});