const test = require('node:test');
const assert = require('node:assert/strict');

const { Reactor_PFR } = require('../../src/specificClass');
const { makeReactorConfig } = require('../helpers/factories');

const DAY_MS = 1000 * 60 * 60 * 24;

test('updateState warns when local Peclet number is too high at zero dispersion', () => {
  const reactor = new Reactor_PFR(
    makeReactorConfig({ reactor_type: 'PFR', length: 10, resolution_L: 5, volume: 50, n_inlets: 1 }),
  );

  const warnings = [];
  reactor.logger.warn = (msg) => warnings.push(String(msg));

  reactor.currentTime = 0;
  reactor.timeStep = 1;
  reactor.speedUpFactor = 1;
  reactor.Fs[0] = 2;
  reactor.D = 0;
  reactor.tick = () => reactor.state;

  reactor.updateState(DAY_MS);

  assert.equal(warnings.some((w) => w.includes('Péclet number') || w.includes('Peclet number')), true);
});