How do you set the text of a text input and then test it's value with React / Enzyme?
const input = wrapper.find('#my-input');
input.simulate('change',
{ target: { value: 'abc' } }
);
const val = input.node.value;
//val is ''
All the solutions here appear not to work..
To really understand what's happening in your code it would be useful to see your component code (specifically your onChange handler.
However, in regards to the following code:
input.simulate('change', {target: {value: 'abc'}});
This won't actually change the value of your <input /> element, instead it just causes your onChange function to be run and be provided an event object that looks like {target: {value: 'abc'}}.
The idea is that your onChange function would update your state or store, so triggering this function should result in your DOM being updated. If you don't actually have an onChange handler defined using input.simulate('change') won't do anything.
So, if your goal is to actually set the value of an input and not trigger an onChange handler then you can use JS to manually update the DOM using something like wrapper.find('#my-input').node.value = 'abc'; however this is circumventing React's render cycle and you'll likely see this value cleared/removed if you do anything to trigger a re-render.
input.node.value = "Test", and I am getting this error TypeError: Can't add property value, object is not extensible. Any ideas?
node.find('#id_name').get(0).value = to node.find('#id_name').instance().value =I'm using React 16 and Enzyme 3.10 over here and this completely worked for me (after trying too many different suggestions out there):
wrapper.find("input").instance().value = "abc";
Apparently, in previous versions you could use node or getNode() instead of instance(), which were parts of my many previous attempts.
.node but Enzyme told me to use getElement() but that gave me the react element and not the dom element. Thx for sharing the instance() function.
typescript is failing with error: TS2339: Property value does not exist on type Component<{}, {}> . Can you please help?
wrapper.find("input").instance<HTMLInputElement>().value = "abc"; would work.This works for both Enzyme 3 and Enzyme 2:
wrapper.find('input').getDOMNode().value = 'new value';
wrapper.find('input').simulate('change');
.getDOMNode() can be used like .node in Enzyme 2 and like .instance() in Enzyme 3.
wrapper.getDOMNode is not a function. Looks like it's only for mount github.com/airbnb/enzyme/blob/master/docs/api/ReactWrapper/…If using TypeScript you can do the following
wrapper.find('input').getDOMNode<HTMLInputElement>().value = 'new value';
wrapper.find('input').simulate('change');
Here it works for me..
I have change the input text, with value updation. And Update my DOM property.
.update()
After updating I am checking the button disable property with input mobile number length use cases.
const input = MobileNumberComponent.find('input')
input.props().onChange({target: {
id: 'mobile-no',
value: '1234567900'
}});
MobileNumberComponent.update()
const Footer = (loginComponent.find('Footer'))
expect(Footer.find('Buttons').props().disabled).equals(false)
I found that I had to use Jest's fake time to give my React onChange function time to run and note the new value of the text input. Here's the full test (though, no setup), using React, jest, and enzyme:
describe('Modal with text input', () => {
beforeEach(() => {
jest.useFakeTimers();
});
afterEach(() => {
jest.clearAllTimers();
jest.useRealTimers();
});
it('enter email, get email tag', () => {
const modal = render();
let textField = modal.find('input[data-test-id="assignEmailInput"]');
let tags = modal.find('[className*="spectrum-Tag--removable"]');
// initial load
expect(textField.prop('value')).toBe('');
expect(tags).toHaveLength(3);
// "write" in the input
textField.simulate('click');
textField.simulate('change', { target: { value: '[email protected]' } });
// enact the writing for jest
jest.advanceTimersByTime(150);
modal.update();
textField = modal.find('input[data-test-id="assignEmailInput"]');
tags = modal.find('[className*="spectrum-Tag--removable"]');
expect(textField.prop('value')).toBe('[email protected]');
expect(tags).toHaveLength(3);
const expected = ['[email protected]', '[email protected]', '[email protected]'];
tags.forEach((tag, i) => expect(tag.contains(expected[i])).toBe(true));
// enact the onBlur function that sets tags
textField.simulate('blur');
modal.update();
textField = modal.find('input[data-test-id="assignEmailInput"]');
tags = modal.find('[className*="spectrum-Tag--removable"]');
expect(textField.prop('value')).toBe('');
expect(tags).toHaveLength(4);
expected.push('[email protected]');
tags.forEach((tag, i) => expect(tag.contains(expected[i])).toBe(true));
});
});
mountfor it to work properly.