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import createEventHub from '~/helpers/event_hub_factory';
import Diff from '~/diff';
describe('Diff', () => {
describe('diff <-> tabs interactions', () => {
let hub;
beforeEach(() => {
hub = createEventHub();
});
describe('constructor', () => {
it("takes in the `mergeRequestEventHub` when it's provided", () => {
const diff = new Diff({ mergeRequestEventHub: hub });
expect(diff.mrHub).toBe(hub);
});
it('does not fatal if no event hub is provided', () => {
expect(() => {
new Diff(); /* eslint-disable-line no-new */
}).not.toThrow();
});
it("doesn't set the mrHub property if none is provided by the construction arguments", () => {
const diff = new Diff();
expect(diff.mrHub).toBe(undefined);
});
});
describe('viewTypeSwitch', () => {
const clickPath = '/path/somewhere?params=exist';
const jsonPath = 'http://test.host/path/somewhere.json?params=exist';
const simulatejQueryClick = {
originalEvent: {
target: {
getAttribute() {
return clickPath;
},
},
preventDefault: jest.fn(),
stopPropagation: jest.fn(),
},
};
it('emits the correct switch view event when called and there is an `mrHub`', async () => {
const diff = new Diff({ mergeRequestEventHub: hub });
const hubEmit = new Promise((resolve) => {
hub.$on('diff:switch-view-type', resolve);
});
diff.viewTypeSwitch(simulatejQueryClick);
const { source } = await hubEmit;
expect(simulatejQueryClick.originalEvent.preventDefault).toHaveBeenCalled();
expect(simulatejQueryClick.originalEvent.stopPropagation).toHaveBeenCalled();
expect(source).toBe(jsonPath);
});
it('is effectively a noop when there is no `mrHub`', () => {
const diff = new Diff();
expect(diff.mrHub).toBe(undefined);
expect(() => {
diff.viewTypeSwitch(simulatejQueryClick);
}).not.toThrow();
});
});
});
});
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