Fix reduced test coverage

Author: ning-y

test/cadet/public/updater_test.exs

@@ -52,11 +52,19 @@ defmodule Cadet.Public.UpdaterTest do
     end
   end
 
-  test "Get announcements" do
-    use_cassette "updater/get_announcements#1", custom: true do
-      %{token: token, course_id: course_id} = Updater.get_api_params()
-      assert {:ok, announcements} = Updater.get_announcements(token, course_id)
-      assert is_list(announcements)
+  describe "Get announcements" do
+    test "Valid token" do
+      use_cassette "updater/get_announcements#1", custom: true do
+        %{token: token, course_id: course_id} = Updater.get_api_params()
+        assert {:ok, announcements} = Updater.get_announcements(token, course_id)
+        assert is_list(announcements)
+      end
+    end
+
+    test "Invalid token" do
+      use_cassette "updater/get_announcements#2" do
+        assert {:error, :bad_request} = Updater.get_announcements("t0k3n", "")
+      end
     end
   end
 
@@ -98,7 +106,7 @@ defmodule Cadet.Public.UpdaterTest do
 
     test "Invalid token" do
       use_cassette "updater/handle_info#2", custom: true do
-        api_params = Updater.get_api_params()
+        api_params = %{Updater.get_api_params() | token: "bad_token"}
         assert {:noreply, new_api_params} = Updater.handle_info(:work, api_params)
         assert api_params.course_id == new_api_params.course_id
         assert String.length(new_api_params.token) == 480

test/fixtures/vcr_cassettes/updater/get_announcements#2.json

@@ -0,0 +1,29 @@
+[
+  {
+    "request": {
+      "body": "",
+      "headers": [],
+      "method": "get",
+      "options": [],
+      "request_body": "",
+      "url": "https://ivle.nus.edu.sg/api/Lapi.svc/Announcements"
+    },
+    "response": {
+      "binary": false,
+      "body": "{\"Results\":[],\"Comments\":\"Invalid login!\",\"LastUpdate\":\"\\/Date(1530503822337+0800)\\/\",\"LastUpdate_js\":\"2018-07-02T11:57:02.3375561+08:00\"}",
+      "headers": {
+        "Cache-Control": "private",
+        "Content-Type": "application/json",
+        "Server": "Microsoft-IIS/8.5",
+        "Request-Context": "appId=cid-v1:9bebd252-0be2-48b7-a1db-8e2b70524944",
+        "Set-Cookie": "ASP.NET_SessionId=hxgayx5s3gmikr4kagjsqt0g; path=/; HttpOnly",
+        "X-AspNet-Version": "4.0.30319",
+        "X-Powered-By": "ASP.NET",
+        "Date": "Mon, 02 Jul 2018 03:57:01 GMT",
+        "Content-Length": "138"
+      },
+      "status_code": 200,
+      "type": "ok"
+    }
+  }
+]