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import { GlIntersectionObserver } from '@gitlab/ui';
import { shallowMountExtended } from 'helpers/vue_test_utils_helper';
import Chunk from '~/vue_shared/components/source_viewer/components/chunk.vue';
import ChunkLine from '~/vue_shared/components/source_viewer/components/chunk_line.vue';
const DEFAULT_PROPS = {
chunkIndex: 2,
isHighlighted: false,
content: '// Line 1 content \n // Line 2 content',
startingFrom: 140,
totalLines: 50,
language: 'javascript',
};
describe('Chunk component', () => {
let wrapper;
const createComponent = (props = {}) => {
wrapper = shallowMountExtended(Chunk, { propsData: { ...DEFAULT_PROPS, ...props } });
};
const findIntersectionObserver = () => wrapper.findComponent(GlIntersectionObserver);
const findChunkLines = () => wrapper.findAllComponents(ChunkLine);
const findLineNumbers = () => wrapper.findAllByTestId('line-number');
const findContent = () => wrapper.findByTestId('content');
beforeEach(() => {
createComponent();
});
afterEach(() => wrapper.destroy());
describe('Intersection observer', () => {
it('renders an Intersection observer component', () => {
expect(findIntersectionObserver().exists()).toBe(true);
});
it('emits an appear event when intersection-observer appears', () => {
findIntersectionObserver().vm.$emit('appear');
expect(wrapper.emitted('appear')).toEqual([[DEFAULT_PROPS.chunkIndex]]);
});
it('does not emit an appear event is isHighlighted is true', () => {
createComponent({ isHighlighted: true });
findIntersectionObserver().vm.$emit('appear');
expect(wrapper.emitted('appear')).toEqual(undefined);
});
});
describe('rendering', () => {
it('does not render a Chunk Line component if isHighlighted is false', () => {
expect(findChunkLines().length).toBe(0);
});
it('renders simplified line numbers and content if isHighlighted is false', () => {
expect(findLineNumbers().length).toBe(DEFAULT_PROPS.totalLines);
expect(findLineNumbers().at(0).attributes()).toMatchObject({
'data-line-number': `${DEFAULT_PROPS.startingFrom + 1}`,
href: `#L${DEFAULT_PROPS.startingFrom + 1}`,
id: `L${DEFAULT_PROPS.startingFrom + 1}`,
});
expect(findContent().text()).toBe(DEFAULT_PROPS.content);
});
it('renders Chunk Line components if isHighlighted is true', () => {
const splitContent = DEFAULT_PROPS.content.split('\n');
createComponent({ isHighlighted: true });
expect(findChunkLines().length).toBe(splitContent.length);
expect(findChunkLines().at(0).props()).toMatchObject({
number: DEFAULT_PROPS.startingFrom + 1,
content: splitContent[0],
language: DEFAULT_PROPS.language,
});
});
});
});
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