TypeError: r.node.getBBox is not a function , while running test cases

[Amitkumarc]

hi @junedchhipa ,

I am getting the below errors while running test cases for PieChart react component. I am using Jest and Enzyme for testing.

While mounting the component: TypeError: r.node.getBBox is not a function

  33 |     it('should invoke useEffect ', () => {
  34 |         act(() => {
> 35 |             component = mount(<Chart {...props} />)
     |                         ^
  36 |             component.setProps({ compositionUnit: UNITS.VOLUME })
  37 |         })

  at new create (node_modules/apexcharts/dist/apexcharts.common.js:6:378800)
  at e.bbox (node_modules/apexcharts/dist/apexcharts.common.js:6:379007)
  at g (node_modules/apexcharts/dist/apexcharts.common.js:6:399056)
  at e.size (node_modules/apexcharts/dist/apexcharts.common.js:6:368332)
  at create.rect (node_modules/apexcharts/dist/apexcharts.common.js:6:391433)
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:6:15460)
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:6:155619)
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:14:39268)
  at t.create (node_modules/apexcharts/dist/apexcharts.common.js:6:3411)
  at node_modules/apexcharts/dist/apexcharts.common.js:14:37819
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:14:37312)
  at r.value (node_modules/react-apexcharts/dist/react-apexcharts.min.js:1:2760)
  at commitLifeCycles (node_modules/react-dom/cjs/react-dom.development.js:19814:22)

While calling ApexCharts.exec funtion:

TypeError: Cannot set property 'fillStyle' of null

117 | ApexCharts.exec("donut", "dataURI").then(({ imgURI }) => { | ^ 118 | uriArray.push(imgURI)

  at node_modules/apexcharts/dist/apexcharts.common.js:6:142365
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:6:142083)
  at t.value (node_modules/apexcharts/dist/apexcharts.common.js:14:47346)
  at Function.exec (node_modules/apexcharts/dist/apexcharts.common.js:14:48349)

Can you please tell, how to resolve these issues.

[Amitkumarc]

The error goes away by mocking the library.

https://stackoverflow.com/questions/51957794/jest-typeerror-is-not-a-function-in-jest-mock

What I did is:

import ApexCharts from "apexcharts";
import ReactApexChart from "react-apexcharts";

jest.mock('react-apexcharts', () => jest.fn(() => { return null }));
jest.mock('apexcharts', () => ({ exec: jest.fn(() => { return new Promise((resolve, reject) => { resolve("uri") }) }) }));

[siruku6]

I was also caught in this error. But, thanks to ijayoa, @Amitkumarc, I could suppress this error.

# error message

(node:3677) UnhandledPromiseRejectionWarning: TypeError: Caught error after test environment was torn down

Cannot read property 'body' of null
(node:3677) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 23)
 FAIL  src/App.test.js (28.739s)
  ● renders hoge huga

    TypeError: r.node.getBBox is not a function

...

My App.js is below.

# App.js
import React, { Component } from 'react';
import ReactApexChart from 'react-apexcharts'

class App extends Component {
  constructor(props) {
    super(props);
    this.state = {
      options: {
        chart: {
          type: 'candlestick',
          height: 350
        },
        title: {
          text: 'CandleStick Chart',
          align: 'left'
        },
        xaxis: {
          type: 'datetime'
        },
        yaxis: {
          tooltip: {
            enabled: true
          }
        }
      },
      series: [{
        name: 'series-1',
        data: [{
            x: new Date(1538778600000),
            y: [6629.81, 6650.5, 6623.04, 6633.33]
          },
          {
            x: new Date(1538780400000),
            y: [6632.01, 6643.59, 6620, 6630.11]
          },
          {
            x: new Date(1538782200000),
            y: [6630.71, 6648.95, 6623.34, 6635.65]
          },
          {
            x: new Date(1538784000000),
            y: [6635.65, 6651, 6629.67, 6638.24]
          },
          {
            x: new Date(1538785800000),
            y: [6638.24, 6640, 6620, 6624.47]
          },
          {
            x: new Date(1538787600000),
            y: [6624.53, 6636.03, 6621.68, 6624.31]
          },
          {
            x: new Date(1538789400000),
            y: [6624.61, 6632.2, 6617, 6626.02]
          },
          {
            x: new Date(1538791200000),
            y: [6627, 6627.62, 6584.22, 6603.02]
          },
          {
            x: new Date(1538793000000),
            y: [6605, 6608.03, 6598.95, 6604.01]
          },
          {
            x: new Date(1538794800000),
            y: [6604.5, 6614.4, 6602.26, 6608.02]
          },
          {
            x: new Date(1538796600000),
            y: [6608.02, 6610.68, 6601.99, 6608.91]
          },
        ]
      }]
    }
  }

  render() {
    return (
      <>
        <div id="chart">
          <ReactApexChart options={this.state.options} series={this.state.series} type="candlestick" width={800} height={350} />
        </div>
        <span>test hoge huga !</span>
      </>
    );
  }
}

export default App;

And, as @ijayoa, @Amitkumarc says, mocks helped me to avoid this error.

# App.test.js

import React from 'react';
import { render } from '@testing-library/react';
import App from './App';

// I added only the following two mocks.
jest.mock("react-apexcharts", () => jest.fn(() => { return null; }) );
jest.mock("apexcharts", () => (
  {
    exec: jest.fn(() => {
      return new Promise(
        (resolve, reject) => { resolve("uri"); }
      );
    }) 
  }
));


test('renders hoge huga', () => {
  const { getByText } = render(<App />);
  const linkElement = getByText(/hoge huga/i);
  expect(linkElement).toBeInTheDocument();
});

# result
=>  PASS  src/App.test.js (15.903s)

Thank you.

[saurabhnemade]

I did managed to get few functionality working by adding mocks to SVGElement. Any idea on how can I import this library from source rather than dist? I might be able to get it working. I did managed to get one simple chart working by following mock & adding "jest-canvas-mock": "^2.3.1",:

  beforeEach(() => {
    window.SVGElement.prototype.getBBox = () => ({
      x: 0,
      y: 0
    });
    window.SVGElement.prototype.getScreenCTM = () => new DOMMatrix([1, 2, 3, 4, 5, 6]);
    window.SVGElement.prototype.createSVGMatrix = () => ({
      x: 28,
      y: 20,
      inverse: () => {},
      multiply: () => {}
    });
  });

  afterEach(() => {
    delete window.SVGElement.prototype.getBBox;
  });

Right now I am getting error as s[t] is not a function error. If I have this lib imported from source I might get the function name and I can mock it.

[saurabhnemade]

Guys if anyone is tracking is, here is quick update. I reached to an error which is like s[t] is not a function. I dig a lot into it. Found out that is bug in svg.js https://github.com/apexcharts/apexcharts.js/blob/4b46d339ca16c70751952e6b0f2facb8812fe643/src/svgjs/svg.js#L463

in latest version of svg.js https://cdnjs.cloudflare.com/ajax/libs/svg.js/3.0.16/svg.js the missing function A is added in pathHandlers.

[two-pack]

I reached to an error which is like s[t] is not a function. I dig a lot into it. Found out that is bug in svg.js https://github.com/apexcharts/apexcharts.js/blob/4b46d339ca16c70751952e6b0f2facb8812fe643/src/svgjs/svg.js#L463

in latest version of svg.js https://cdnjs.cloudflare.com/ajax/libs/svg.js/3.0.16/svg.js the missing function A is added in pathHandlers.

I got same one. The missing function was removed following commit for down package size. https://github.com/apexcharts/apexcharts.js/commit/42b84d7dfc4b1dffe511b8d67d8f878971d1c2b5#diff-160a469199931ab18c3e9119104abc910c395564c52f7d26f2b4608623c511bd

My case works with reverting pathHandlers in svg.js.

[saurabhnemade]

@two-pack I moved to cypress completely for unit testing of chart based components. It was easier to test them with rendering them in browser with cypress and quickly write test for them.

[rodpatulski]

The error goes away by mocking the library.

https://stackoverflow.com/questions/51957794/jest-typeerror-is-not-a-function-in-jest-mock

What I did is:

import ApexCharts from "apexcharts";
import ReactApexChart from "react-apexcharts";

jest.mock('react-apexcharts', () => jest.fn(() => { return null }));
jest.mock('apexcharts', () => ({ exec: jest.fn(() => { return new Promise((resolve, reject) => { resolve("uri") }) }) }));

Doesn't that mock the whole library to do nothing? How are your renders still working?

[Narven]

Is there a fix for this? In 2023 I'm still having problem with this. What can we do related to this?