Add a test for checksumming

packages/rss-handler/package.json

@@ -17,7 +17,8 @@
   "devDependencies": {
     "chai": "^4.3.6",
     "eslint-plugin-prettier": "^4.0.0",
-    "mocha": "^10.0.0"
+    "mocha": "^10.0.0",
+    "nock": "^13.3.4"
   },
   "dependencies": {
     "@google-cloud/functions-framework": "3.1.2",

packages/rss-handler/src/index.ts

@@ -23,13 +23,7 @@ function isRssFeedRequest(body: any): body is RssFeedRequest {
   )
 }
 
-type FeedFetchResult = {
-  url: string
-  content: string
-  checksum: string
-}
-
-async function fetchAndChecksum(url: string): Promise<FeedFetchResult> {
+export const fetchAndChecksum = async (url: string) => {
   try {
     const response = await axios.get(url, {
       responseType: 'arraybuffer',

packages/rss-handler/test/checksum.test.ts

@@ -0,0 +1,14 @@
+import 'mocha'
+import nock from 'nock'
+import { expect } from 'chai'
+import { fetchAndChecksum } from '../src/index'
+
+describe('fetchAndChecksum', () => {
+  it('should hash the content available', async () => {
+    nock('https://fake.com', {}).get('/rss.xml').reply(200, 'i am some content')
+    const result = await fetchAndChecksum('https://fake.com/rss.xml')
+    expect(result.checksum).to.eq(
+      'd6bc10faec048d999d0cf4b2f7103d84557fb9cd94c3bccd17884b1288949375'
+    )
+  })
+})

packages/rss-handler/test/stub.test.ts

@@ -1,8 +0,0 @@
-import 'mocha'
-import { expect } from 'chai'
-
-describe('stub test', () => {
-  it('should pass', () => {
-    expect(true).to.be.true
-  })
-})