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import { shallowMount } from '@vue/test-utils';
import { GlButton } from '@gitlab/ui';
import LogControlButtons from '~/logs/components/log_control_buttons.vue';
import {
canScroll,
isScrolledToTop,
isScrolledToBottom,
scrollDown,
scrollUp,
} from '~/lib/utils/scroll_utils';
jest.mock('~/lib/utils/scroll_utils');
describe('LogControlButtons', () => {
let wrapper;
const findScrollToTop = () => wrapper.find('.js-scroll-to-top');
const findScrollToBottom = () => wrapper.find('.js-scroll-to-bottom');
const findRefreshBtn = () => wrapper.find('.js-refresh-log');
const initWrapper = () => {
wrapper = shallowMount(LogControlButtons);
};
afterEach(() => {
if (wrapper) {
wrapper.destroy();
}
});
it('displays UI elements', () => {
initWrapper();
expect(wrapper.isVueInstance()).toBe(true);
expect(wrapper.isEmpty()).toBe(false);
expect(findScrollToTop().is(GlButton)).toBe(true);
expect(findScrollToBottom().is(GlButton)).toBe(true);
expect(findRefreshBtn().is(GlButton)).toBe(true);
});
it('emits a `refresh` event on click on `refresh` button', () => {
initWrapper();
// An `undefined` value means no event was emitted
expect(wrapper.emitted('refresh')).toBe(undefined);
findRefreshBtn().vm.$emit('click');
return wrapper.vm.$nextTick().then(() => {
expect(wrapper.emitted('refresh')).toHaveLength(1);
});
});
describe('when scrolling actions are enabled', () => {
beforeEach(() => {
// mock scrolled to the middle of a long page
canScroll.mockReturnValue(true);
isScrolledToBottom.mockReturnValue(false);
isScrolledToTop.mockReturnValue(false);
initWrapper();
wrapper.vm.update();
return wrapper.vm.$nextTick();
});
afterEach(() => {
canScroll.mockReset();
isScrolledToTop.mockReset();
isScrolledToBottom.mockReset();
});
it('click on "scroll to top" scrolls up', () => {
expect(findScrollToTop().is('[disabled]')).toBe(false);
findScrollToTop().vm.$emit('click');
expect(scrollUp).toHaveBeenCalledTimes(1);
});
it('click on "scroll to bottom" scrolls down', () => {
expect(findScrollToBottom().is('[disabled]')).toBe(false);
findScrollToBottom().vm.$emit('click');
expect(scrollDown).toHaveBeenCalledTimes(1); // plus one time when trace was loaded
});
});
describe('when scrolling actions are disabled', () => {
beforeEach(() => {
// mock a short page without a scrollbar
canScroll.mockReturnValue(false);
isScrolledToBottom.mockReturnValue(true);
isScrolledToTop.mockReturnValue(true);
initWrapper();
});
it('buttons are disabled', () => {
wrapper.vm.update();
return wrapper.vm.$nextTick(() => {
expect(findScrollToTop().is('[disabled]')).toBe(true);
expect(findScrollToBottom().is('[disabled]')).toBe(true);
});
});
});
});
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