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import { mount } from 'enzyme';
import wait from 'waait';
import toJSON from 'enzyme-to-json';
import Router from 'next/router';
import { MockedProvider } from 'react-apollo/test-utils';
import CreateItem, { CREATE_ITEM_MUTATION } from '../components/CreateItem';
import { fakeItem } from '../lib/testUtils';
const dogImage = 'https://dog.com/dog.jpg';
// mock the global fetch API
global.fetch = jest.fn().mockResolvedValue({
json: () => ({
secure_url: dogImage,
eager: [{ secure_url: dogImage }],
}),
});
describe('<CreateItem/>', () => {
it('renders and matches snapshot', async () => {
const wrapper = mount(
<MockedProvider>
<CreateItem />
</MockedProvider>
);
const form = wrapper.find('form[data-test="form"]');
expect(toJSON(form)).toMatchSnapshot();
});
it('uploads a file when changed', async () => {
const wrapper = mount(
<MockedProvider>
<CreateItem />
</MockedProvider>
);
const input = wrapper.find('input[type="file"]');
input.simulate('change', { target: { files: ['fakedog.jpg'] } });
await wait();
const component = wrapper.find('CreateItem').instance();
expect(component.state.image).toEqual(dogImage);
expect(component.state.largeImage).toEqual(dogImage);
expect(global.fetch).toHaveBeenCalled();
global.fetch.mockReset();
});
it('handles state updating', async () => {
const wrapper = mount(
<MockedProvider>
<CreateItem />
</MockedProvider>
);
wrapper.find('#title').simulate('change', { target: { value: 'Testing', name: 'title' } });
wrapper
.find('#price')
.simulate('change', { target: { value: 50000, name: 'price', type: 'number' } });
wrapper
.find('#description')
.simulate('change', { target: { value: 'This is a really nice item', name: 'description' } });
expect(wrapper.find('CreateItem').instance().state).toMatchObject({
title: 'Testing',
price: 50000,
description: 'This is a really nice item',
});
});
it('creates an item when the form is submitted', async () => {
const item = fakeItem();
const mocks = [
{
request: {
query: CREATE_ITEM_MUTATION,
variables: {
title: item.title,
description: item.description,
image: '',
largeImage: '',
price: item.price,
},
},
result: {
data: {
createItem: {
...fakeItem,
id: 'abc123',
__typename: 'Item',
},
},
},
},
];
const wrapper = mount(
<MockedProvider mocks={mocks}>
<CreateItem />
</MockedProvider>
);
// simulate someone filling out the form
wrapper.find('#title').simulate('change', { target: { value: item.title, name: 'title' } });
wrapper
.find('#price')
.simulate('change', { target: { value: item.price, name: 'price', type: 'number' } });
wrapper
.find('#description')
.simulate('change', { target: { value: item.description, name: 'description' } });
// mock the router
Router.router = { push: jest.fn() };
wrapper.find('form').simulate('submit');
await wait(50);
expect(Router.router.push).toHaveBeenCalled();
expect(Router.router.push).toHaveBeenCalledWith({ pathname: '/item', query: { id: 'abc123' } });
});
});
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