Add containsWhitespace snippet

test/containsWhitespace.test.js

@@ -0,0 +1,11 @@
+const {containsWhitespace} = require('./_30s.js');
+
+test('containsWhitespace is a Function', () => {
+  expect(containsWhitespace).toBeInstanceOf(Function);
+});
+test('containsWhitespace returns true when there are whitespaces', () => {
+  expect(containsWhitespace('Lorem Ipsum')).toBe(true);
+});
+test('containsWhitespace returns false when there are no whitespaces', () => {
+  expect(containsWhitespace('LoremIpsum')).toBe(false);
+});