How to trap known errors

components.my-component\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';
import { tracked } from '@glimmer/tracking';

function handleError(error) {
  if (!error.isExpected) {
    throw error;
  }
}

export default class extends Component {
  @tracked state = 'idle';

  @action
  async doSomething() {
    this.state = 'loading';
    try {
      await this.args.callback();
      this.state = 'done';
    } catch (error) {
      this.state = 'errored';
      handleError(error);
    }
  }
}

templates.components.my-component\.hbs

<button type="button" ...attributes {{on "click" this.doSomething}}>{{this.state}}</button>

tests.integration.components.my-component-test\.js

import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { render, find, click } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';

class TestError extends Error {
  message = 'test error';
  isExpected = true;
}

module('TODO: put something here', function(hooks) {
  setupRenderingTest(hooks);

  test('it manages an errored state', async function(assert) {
    let callCount = 0;
    this.callbackStub = () => {
      callCount++;
      return Promise.reject(new TestError());
    };
    
    await render(hbs`<MyComponent id="test-component" @callback={{this.callbackStub}} />`);
    await click('#test-component');
    
    assert.equal(find('#test-component').textContent.trim(), 'errored');
    assert.equal(callCount, 1);

  });
});

tests.test-helper\.js

import Application from '../app';
import config from '../config/environment';
import { setApplication } from '@ember/test-helpers';
import { assign } from '@ember/polyfills';
import { start } from 'ember-qunit';

let attributes = {
  rootElement: '#test-root',
  autoboot: false
};
attributes = assign(attributes, config.APP);

let application = Application.create(attributes);
setApplication(application);

start();

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}