redux-devtools/packages/redux-devtools-trace-monitor/test/StackTraceTab.spec.js

import React from 'react';
import { configure, mount } from 'enzyme';
import toJson from 'enzyme-to-json';
import StackTraceTab from '../src/StackTraceTab';

import Adapter from 'enzyme-adapter-react-15';
configure({ adapter: new Adapter() });

function genAsyncSnapshot(component, done) {
  setTimeout(() => {
    component.update();
    expect(toJson(component)).toMatchSnapshot();
    done();
  });
}

const actions = {
  0: { type: 'PERFORM_ACTION', action: { type: '@@INIT' } },
  1: { type: 'PERFORM_ACTION', action: { type: 'INCREMENT_COUNTER' } },
  2: {
    type: 'PERFORM_ACTION', action: { type: 'INCREMENT_COUNTER' },
    stack: 'Error\n    at fn1 (app.js:72:24)\n    at fn2 (app.js:84:31)'
  }
};

describe('StackTraceTab component', () => {
  it('should render with no props', (done) => {
    const component = mount(<StackTraceTab />);
    genAsyncSnapshot(component, done);
  });

  it('should render with props, but without stack', (done) => {
    const component = mount(
      <StackTraceTab
        actions={actions} action={actions[0].action}
      />
    );
    genAsyncSnapshot(component, done);
  });

  it('should render with trace stack', (done) => {
    const component = mount(
      <StackTraceTab
      actions={actions} action={actions[2].action}
      />
    );
    genAsyncSnapshot(component, done);
  });
});