I have a method add
which I want to mock:
A.js
function add(a, b, c) {
return a b c
}
export add;
I am calling this add
method in componentDidMount
like this
B.js
import add from './A';
class AddForm extends React.Component {
...
componentDidMount() {
add(1, 2, 3);
}
...
}
export AddForm;
Now this is how I am testing it
B.test.js
import AddForm from './B';
const helpers = require("./A");
jest.spyOn(helpers, "add").mockImplementation(() => 100);
describe('<AddForm/>', () => {
test('should render all elements', () => {
return render(
<AddForm></AddForm>,
);
}
}
I am not getting the mocked value 100
while testing instead the function is getting executed. I tried all answers that are available but unable to get this mocked response.
Anything that I am missing here?
CodePudding user response:
Check these documents
Sample:
const helpers = require("./A");
jest.mock('./A')
test('should render all elements', () => {
helper.add.mockReturnValue(100);
// write your test case
});