catch bot rate limiting error, update tests

src/bot.test.js

@@ -35,8 +35,11 @@ import {
 
 import OcrccBot from './bot'
 
-describe('OcrccBot', () => {
 
+const mockAppendFileSync = jest.fn()
+fs.appendFileSync = mockAppendFileSync
+
+describe('OcrccBot', () => {
   beforeEach(() => {
     createClient.mockClear()
     mockInitCrypto.mockClear()
@@ -61,6 +64,7 @@ describe('OcrccBot', () => {
     mockGetJoinedRoomMembers.mockClear()
     mockGetUser.mockClear()
     mockSendTextMessage.mockClear()
+    mockAppendFileSync.mockClear()
   })
 
   test('constructor should inititialize matrix client', () => {
@@ -196,11 +200,10 @@ describe('OcrccBot', () => {
   })
 
   test('#writeToTranscript should parse event and write to transcript file', () => {
-    const appendFileSyncSpy = jest.spyOn(fs, 'appendFileSync')
     const bot = new OcrccBot()
     bot.start()
 
-    bot.activeChatrooms['test_room_id'] = { transcriptFile: 'test filepath' }
+    bot.activeChatrooms['test_room_id'] = { transcriptFile: '__mocks__/test_transcript.txt' }
 
     waitForExpect(() => {
       expect(mockStartClient).toHaveBeenCalled()
@@ -216,7 +219,7 @@ describe('OcrccBot', () => {
     bot.writeToTranscript(mockEvent)
 
     waitForExpect(() => {
-      expect(appendFileSyncSpy).toHaveBeenCalledWith('test filepath', 'test_sender [00:00:00]: test content', 'utf8')
+      expect(mockAppendFileSync).toHaveBeenCalledWith('__mocks__/test_transcript.txt', 'test_sender [00:00:00]: test content', 'utf8')
     })
   })