Add test

__tests__/helpers.spec.tsx

@@ -2,6 +2,7 @@ import React, { MouseEvent, TouchEvent } from 'react';
 import * as helpers from '../src/helpers';
 import { carouselItemNodes } from './__fixtures__/nodes';
 import { SlideDirection } from '../src/types/carousel';
+import { getOuterWidth } from '../src/helpers';
 
 describe('helpers', () => {
 	it('should return to head of circular items list', async () => {
@@ -67,4 +68,13 @@ describe('helpers', () => {
 
 		expect(result).toEqual(pageX);
 	});
+
+	it('should return width of element', async () => {
+		const width = 30;
+		const element = document.createElement('div');
+		Object.defineProperty(element, 'offsetWidth', { value: width });
+		const result = getOuterWidth(element);
+
+		expect(result).toEqual(width);
+	});
 });

jest.config.js

@@ -10,6 +10,7 @@ module.exports = {
 			statements: 100,
 		},
 	},
+	coveragePathIgnorePatterns: ['<rootDir>/src/components/scrolling-carousel'],
 	testPathIgnorePatterns: ['<rootDir>/__tests__/__fixtures__/'],
 	transform: {
 		'^.+\\.tsx?$': 'ts-jest',