add: 左旋转字符串

test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js

@@ -0,0 +1,6 @@
+import { reverseLeftWords } from '../../src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof'
+
+test('左旋转字符串', () => {
+  expect(reverseLeftWords('abcdefg', 2)).toBe('cdefgab')
+  expect(reverseLeftWords('lrloseumgh', 6)).toBe('umghlrlose')
+})