add: 只出现一次的数字等

test/string/reverse-words-in-a-string.test.js

@@ -0,0 +1,5 @@
+import ReverseWordsInAString from '../../src/string/reverse-words-in-a-string'
+
+test('ReverseWordsInAString', () => {
+  expect(ReverseWordsInAString('Let\'s take LeetCode contest')).toBe('s\'teL ekat edoCteeL tsetnoc')
+})