gitlab-org--gitlab-foss/spec/javascripts/performance_bar/index_spec.js
Sean McGivern 8e1a8deee3 Lazy-load performance bar UI
We need to eagerly load the performance bar wrapper component
(`performance_bar/index.js`) when the page is loaded and the container element
is present, to ensure that we register the interceptor early enough in the
page's lifecycle.

However, we don't need to load the UI at that point. Not doing so means that we
can let Webpack extract the UI (`performance_bar/components/*`) into its own
chunk, so users who don't see the performance bar don't have to load too much
unnecessary JavaScript.
2018-07-13 11:25:40 +01:00

83 lines
2.1 KiB
JavaScript

import axios from '~/lib/utils/axios_utils';
import performanceBar from '~/performance_bar';
import PerformanceBarService from '~/performance_bar/services/performance_bar_service';
import MockAdapter from 'axios-mock-adapter';
describe('performance bar wrapper', () => {
let mock;
let vm;
beforeEach(() => {
const peekWrapper = document.createElement('div');
peekWrapper.setAttribute('id', 'js-peek');
peekWrapper.setAttribute('data-env', 'development');
peekWrapper.setAttribute('data-request-id', '123');
peekWrapper.setAttribute('data-peek-url', '/-/peek/results');
peekWrapper.setAttribute('data-profile-url', '?lineprofiler=true');
document.body.appendChild(peekWrapper);
mock = new MockAdapter(axios);
mock.onGet('/-/peek/results').reply(
200,
{
data: {
gc: {
invokes: 0,
invoke_time: '0.00',
use_size: 0,
total_size: 0,
total_object: 0,
gc_time: '0.00',
},
host: { hostname: 'web-01' },
},
},
{},
);
vm = performanceBar({ container: '#js-peek' });
});
afterEach(() => {
vm.$destroy();
mock.restore();
});
describe('loadRequestDetails', () => {
beforeEach(() => {
spyOn(vm.store, 'addRequest').and.callThrough();
});
it('does nothing if the request cannot be tracked', () => {
spyOn(vm.store, 'canTrackRequest').and.callFake(() => false);
vm.loadRequestDetails('123', 'https://gitlab.com/');
expect(vm.store.addRequest).not.toHaveBeenCalled();
});
it('adds the request immediately', () => {
vm.loadRequestDetails('123', 'https://gitlab.com/');
expect(vm.store.addRequest).toHaveBeenCalledWith(
'123',
'https://gitlab.com/',
);
});
it('makes an HTTP request for the request details', () => {
spyOn(PerformanceBarService, 'fetchRequestDetails').and.callThrough();
vm.loadRequestDetails('456', 'https://gitlab.com/');
expect(PerformanceBarService.fetchRequestDetails).toHaveBeenCalledWith(
'/-/peek/results',
'456',
);
});
});
});