I have a component which is having an input tag of type=file. I want write a vitest test function, to simulate selection of file and assert its effects.
Gemini gives below script but fails at line 6, where fileInput.element.files is not a property it complains.
import { mount } from '@vue/test-utils';
it('simulates file selection', async () => {
const wrapper = mount(MyComponent);
const fileInput = wrapper.find('input[type="file"]');
const mockFile = new File(['content'], 'filename.txt', { type: 'text/plain' });
await fileInput.element.files = [mockFile]; // Assign mock file to the input element
await fileInput.trigger('change');
// Now you can test your component's behavior after file selection
expect(wrapper.emitted('fileSelected')).toBeTruthy(); // Assuming your component emits an event on file selection
});
I've had the same issue and the workaround was to manually define the files property:
Object.defineProperty(input.element, 'files', {
value: [mockFile],
})