Throw error when a release with no assets are obtained (#678)

Author: robinraju

__tests__/main.test.ts

@@ -33,6 +33,10 @@ beforeEach(() => {
     .get("/repos/robinraju/probable-potato/releases/68092191")
     .reply(200, readFromFile("1-release-latest.json"))
 
+  nock("https://api.github.com")
+    .get("/repos/robinraju/foo-app/releases/tags/1.0.0")
+    .reply(200, readFromFile("3-empty-assets.json"))
+
   nock("https://api.github.com", {
     reqheaders: {accept: "application/octet-stream"}
   })
@@ -286,3 +290,21 @@ test("Download all archive files from public repo", async () => {
     fs.existsSync(path.join(downloadSettings.outFilePath, "test-3.txt"))
   ).toBe(true)
 }, 10000)
+
+test("Fail when a release with no assets are obtained", async () => {
+  const downloadSettings: IReleaseDownloadSettings = {
+    sourceRepoPath: "robinraju/foo-app",
+    isLatest: false,
+    tag: "1.0.0",
+    id: "",
+    fileName: "installer.zip",
+    tarBall: false,
+    zipBall: false,
+    extractAssets: false,
+    outFilePath: outputFilePath
+  }
+  const result = downloader.download(downloadSettings)
+  await expect(result).rejects.toThrow(
+    "No assets found in release Foo app - v1.0.0"
+  )
+}, 10000)

__tests__/resource/3-empty-assets.json

@@ -0,0 +1,22 @@
+{
+    "url": "https://api.github.com/repos/robinraju/foo-app/releases/68092191",
+    "assets_url": "https://api.github.com/repos/robinraju/foo-app/releases/68092191/assets",
+    "upload_url": "https://uploads.github.com/repos/robinraju/foo-app/releases/68092191/assets{?name,label}",
+    "html_url": "https://github.com/robinraju/foo-app/releases/tag/1.0.1",
+    "id": 68092191,
+    "author": {},
+    "node_id": "RE_kwDOHahpL84EDwEf",
+    "tag_name": "1.0.0",
+    "target_commitish": "main",
+    "name": "Foo app - v1.0.0",
+    "draft": false,
+    "prerelease": false,
+    "created_at": "2022-05-29T12:03:47Z",
+    "published_at": "2022-05-29T12:04:42Z",
+    "assets": [
+        
+    ],
+    "tarball_url": "",
+    "zipball_url": "",
+    "body": ""
+}

dist/index.js

@@ -203,6 +203,8 @@ export class ReleaseDownloader {
           )
         }
       }
+    } else {
+      throw new Error(`No assets found in release ${ghRelease.name}`)
     }
 
     if (downloadSettings.tarBall) {