add: 只出现一次的数字等

test/string/compare-strings.test.js

@@ -0,0 +1,7 @@
+import { compareStrings } from '../../src/string/compare-strings'
+
+test('比较字符串', () => {
+  expect(compareStrings('ABCD', 'AB')).toBe(true)
+  expect(compareStrings('ABCD', 'ACD')).toBe(true)
+  expect(compareStrings('ABCD', 'AABC')).toBe(false)
+})