130 lines
4.0 KiB
JavaScript
130 lines
4.0 KiB
JavaScript
import { range as rge, throttle } from 'lodash';
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import DirtySubmitForm from '~/dirty_submit/dirty_submit_form';
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import { getInputValue, setInputValue, createForm } from './helper';
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jest.mock('lodash/throttle', () => jest.fn((fn) => fn));
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const lodash = jest.requireActual('lodash');
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function expectToToggleDisableOnDirtyUpdate(submit, input) {
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const originalValue = getInputValue(input);
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expect(submit.disabled).toBe(true);
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setInputValue(input, `${originalValue} changes`);
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expect(submit.disabled).toBe(false);
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setInputValue(input, originalValue);
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expect(submit.disabled).toBe(true);
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}
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describe('DirtySubmitForm', () => {
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describe('submit button tests', () => {
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it('disables submit until there are changes', () => {
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const { form, input, submit } = createForm();
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new DirtySubmitForm(form); // eslint-disable-line no-new
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expectToToggleDisableOnDirtyUpdate(submit, input);
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});
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it('disables submit until there are changes when initializing with a falsy value', () => {
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const { form, input, submit } = createForm();
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input.value = '';
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new DirtySubmitForm(form); // eslint-disable-line no-new
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expectToToggleDisableOnDirtyUpdate(submit, input);
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});
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it('disables submit until there are changes for radio inputs', () => {
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const { form, input, submit } = createForm('radio');
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new DirtySubmitForm(form); // eslint-disable-line no-new
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expectToToggleDisableOnDirtyUpdate(submit, input);
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});
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it('disables submit until there are changes for checkbox inputs', () => {
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const { form, input, submit } = createForm('checkbox');
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new DirtySubmitForm(form); // eslint-disable-line no-new
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expectToToggleDisableOnDirtyUpdate(submit, input);
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});
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});
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describe('throttling tests', () => {
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beforeEach(() => {
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throttle.mockImplementation(lodash.throttle);
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});
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afterEach(() => {
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throttle.mockReset();
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});
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it('throttles updates when rapid changes are made to a single form element', () => {
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const { form, input } = createForm();
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const updateDirtyInputSpy = jest.spyOn(new DirtySubmitForm(form), 'updateDirtyInput');
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rge(10).forEach((i) => {
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setInputValue(input, `change ${i}`, false);
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});
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jest.runOnlyPendingTimers();
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expect(updateDirtyInputSpy).toHaveBeenCalledTimes(1);
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});
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it('does not throttle updates when rapid changes are made to different form elements', () => {
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const form = document.createElement('form');
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const range = rge(10);
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range.forEach((i) => {
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form.innerHTML += `<input type="text" name="input-${i}" class="js-input-${i}"/>`;
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});
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const updateDirtyInputSpy = jest.spyOn(new DirtySubmitForm(form), 'updateDirtyInput');
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range.forEach((i) => {
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const input = form.querySelector(`.js-input-${i}`);
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setInputValue(input, `change`, false);
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});
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jest.runOnlyPendingTimers();
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expect(updateDirtyInputSpy).toHaveBeenCalledTimes(range.length);
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});
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describe('when inputs listener is added', () => {
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it('calls listener when changes are made to an input', () => {
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const { form, input } = createForm();
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const inputsListener = jest.fn();
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const dirtySubmitForm = new DirtySubmitForm(form);
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dirtySubmitForm.addInputsListener(inputsListener);
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setInputValue(input, 'new value');
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jest.runOnlyPendingTimers();
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expect(inputsListener).toHaveBeenCalledTimes(1);
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});
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describe('when inputs listener is removed', () => {
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it('does not call listener when changes are made to an input', () => {
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const { form, input } = createForm();
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const inputsListener = jest.fn();
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const dirtySubmitForm = new DirtySubmitForm(form);
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dirtySubmitForm.addInputsListener(inputsListener);
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dirtySubmitForm.removeInputsListener(inputsListener);
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setInputValue(input, 'new value');
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jest.runOnlyPendingTimers();
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expect(inputsListener).not.toHaveBeenCalled();
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});
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});
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});
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});
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});
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