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JS unit testing using enzyme: how to wait for setState within component's method to finish before proceeding with test c


JS unit testing using enzyme: how to wait for setState within component's method to finish before proceeding with test c

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JS unit testing using enzyme: how to wait for setState within component's method to finish before proceeding with test c
Tag : javascript , By : Sigfrieg
Date : November 27 2020, 05:23 PM

Does that help Found a rather simple solution. Use Async/Await:
test('doSomething should trigger ChildComponentB to pop up', async() => {
  const wrapper = shallow(
    <MyComponent
    ...
    />,
  ).dive();

  await wrapper.instane().doSomething(params);

  const childComponentB = wrapper.find('ChildComponentB');
  expect(childComponentB).toHaveLength(1);
});

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How to wait for a method to finish completely before proceeding?


Tag : java , By : taviso
Date : March 29 2020, 07:55 AM
like below fixes the issue the coding below will run OSK (On Screen Keyboard) process after killProcess() kills it, previously it does not pop up before I added the Thread.sleep for 1 second. So is there any way that I can make sure killProcess() is fully executed before it start the OSK process without Thread.sleep for one second?? something that is not timed-based, a code that will run killProcess() completely before going into the next line. Sorry for any confusion and thanks for reading! Hope someone is willing to help me with this one.
public static void main(String... args) {
    try {
        killProcess();
        Runtime.getRuntime().exec("c:\\Temp\\osk.exe");

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

public static void killProcess() throws Exception {
    Runtime rt = Runtime.getRuntime();
    rt.exec("cmd.exe /c taskkill " + "osk.exe").waitFor();
    rt.exec("taskkill /IM " + "osk.exe").waitFor();
}

How to refer to conditional elements when unit testing React components using jest and enzyme


Tag : reactjs , By : Goeran
Date : March 29 2020, 07:55 AM
I hope this helps you . The options for selecting elements can be seen in the documentation for Selector.
In this case, you'd probably want to add css classes and use the class syntax, or perhaps the attribute syntax if your buttons use input elements where the text is set as an attribute.

Enzyme unit testing onChange method using Material UI Components


Tag : reactjs , By : Elwillow
Date : March 29 2020, 07:55 AM
this will help The reason you are having the error is because when you call component.find('input') it returns an array of matched components, so what you want to do is
component.find('input').at(0).simulate('change')
import React from "react";
import Enzyme, { shallow } from "enzyme";
import Adapter from "enzyme-adapter-react-16";
import Comment from "./Comment";
import TextField from "@material-ui/core/TextField";

Enzyme.configure({ adapter: new Adapter() });

describe("Should render <Comment/> component", () => {
  it("should check for onChange method (1)", () => {
    // const wrapper = shallow(<Comment onChange={}/>)
    const onChangeMock = jest.fn();

    const component = shallow(
      <Comment commentChange={onChangeMock} commentBody={"test"} />
    );
    component
      .find(TextField)
      .at(0)
      .simulate("change", "test");
    expect(onChangeMock).toBeCalledWith("test");
  });

  it("should check for onChange method (2)", () => {
    // const wrapper = shallow(<Comment onChange={}/>)
    const onChangeMock = jest.fn();

    const component = shallow(
      <Comment commentChange={onChangeMock} commentBody={"test"} />
    );
    component
      .find(TextField)
      .at(0)
      .props()
      .onChange();
    expect(onChangeMock).toBeCalled();
  });
});

How do I wait for the callback passed to a Cypress custom command to finish before proceeding the test?


Tag : development , By : kuba53280
Date : March 29 2020, 07:55 AM
To fix the issue you can do The main issue is that there is not an assertion named be.
cy.should('be', '') won't do anything - it's not a valid assertion. You're probably looking for cy.should('eq'...)
Cypress.Commands.add('pathShould', (chain, path) => {
  return cy.location('pathname', { timeout: 20000 }).should(chain, path);
});

it('', () => {
  cy.visit('http://example.com')
  .pathShould('eq', '/')
  .log('Reached')
})

ReactWrapper::state() can only be called on class components Unit Testing Jest and Enzyme


Tag : reactjs , By : Jason Haar
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Writing unit testing in react using jest and enzyme. While checking with a component state , it throws an error "ReactWrapper::state() can only be called on class components ". , So your default export
export default withStyles(styles)(CustomerAdd);
import CustomerAdd from '../CustomerAdd'
export class CustomerAdd {
  ...
}

export default withStyles(styles)(CustomerAdd);
import { CustomerAdd } from '../CusomerAdd';
expect(wrapper.find(CustomerAdd).dive().state('addNewOnSubmit')).toEqual(true);
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