chore: refactor server test setup (#3976)

* chore: refactor server test setup

* Close dangling redis connections instead of mocking rate limiter
  specific modules
* Segregate pre and post env test setup

* fix: remove mock file

.jestconfig.json

@@ -12,6 +12,9 @@
       },
       "setupFiles": [
         "<rootDir>/__mocks__/console.js",
+        "<rootDir>/server/test/env.ts"
+      ],
+      "setupFilesAfterEnv": [
         "<rootDir>/server/test/setup.ts"
       ],
       "testEnvironment": "node",

server/__mocks__/RateLimiter.ts

@@ -1,28 +0,0 @@
-export default class MockRateLimiter {
-  static getRateLimiter() {
-    return {
-      points: 100,
-      consume: jest.fn(),
-    };
-  }
-
-  static setRateLimiter() {
-    //
-  }
-
-  static hasRateLimiter() {
-    return false;
-  }
-}
-
-export const RateLimiterStrategy = new Proxy(
-  {},
-  {
-    get() {
-      return {
-        duration: 60,
-        requests: 10,
-      };
-    },
-  }
-);

server/test/env.ts

@@ -0,0 +1,14 @@
+import env from "../env";
+
+// test environment variables
+env.SMTP_HOST = "smtp.example.com";
+env.ENVIRONMENT = "test";
+env.GOOGLE_CLIENT_ID = "123";
+env.GOOGLE_CLIENT_SECRET = "123";
+env.SLACK_CLIENT_ID = "123";
+env.SLACK_CLIENT_SECRET = "123";
+env.DEPLOYMENT = undefined;
+
+if (process.env.DATABASE_URL_TEST) {
+  env.DATABASE_URL = process.env.DATABASE_URL_TEST;
+}

server/test/setup.ts

@@ -1,25 +1,10 @@
-import env from "../env";
+import Redis from "@server/redis";
 
-// test environment variables
-env.SMTP_HOST = "smtp.example.com";
-env.ENVIRONMENT = "test";
-env.GOOGLE_CLIENT_ID = "123";
-env.GOOGLE_CLIENT_SECRET = "123";
-env.SLACK_CLIENT_ID = "123";
-env.SLACK_CLIENT_SECRET = "123";
-env.DEPLOYMENT = undefined;
-
-if (process.env.DATABASE_URL_TEST) {
-  env.DATABASE_URL = process.env.DATABASE_URL_TEST;
-}
-
-// NOTE: this require must come after the ENV var override above
+// NOTE: this require must come after the ENV var override
 // so that sequelize uses the test config variables
 require("@server/database/sequelize");
 
 jest.mock("bull");
-jest.mock("rate-limiter-flexible");
-jest.mock("../RateLimiter");
 
 // This is needed for the relative manual mock to be picked up
 jest.mock("../queues");
@@ -42,3 +27,5 @@ jest.mock("aws-sdk", () => {
 });
 
 jest.mock("@getoutline/y-prosemirror", () => ({}));
+
+afterAll(() => Redis.defaultClient.disconnect());