补充测试

src/libs/memoize.test.js

@@ -0,0 +1,32 @@
+import memoize from './memoize'
+
+test('no parameter', () => {
+  expect(() => {
+    memoize(() => 0)
+  }).toThrowError(/^fn 必须有且只有一个参数$/)
+})
+
+test('two parameters', () => {
+  expect(() => {
+    memoize((a, b) => a + b)
+  }).toThrowError(/^fn 必须有且只有一个参数$/)
+})
+
+test('memoize', () => {
+  const generateTimestamp = type => {
+    switch (type) {
+    case 'now':
+      return +new Date()
+    default:
+      return 0
+    }
+  }
+  const memoizedGenerateTimestamp = memoize(generateTimestamp)
+  const expected = memoizedGenerateTimestamp('now')
+  expect(memoizedGenerateTimestamp('now')).toBe(expected)
+
+  memoizedGenerateTimestamp.delete('now')
+  setTimeout(() => {
+    expect(memoizedGenerateTimestamp('now')).not.toBe(expected)
+  }, 1)
+})

src/libs/parseFilename.test.js

@@ -5,4 +5,8 @@ test('parseFilename', () => {
     basename: 'abc',
     extname: '.edf',
   })
+  expect(parseFilename('abc')).toEqual({
+    basename: 'abc',
+    extname: '',
+  })
 })