fix unit

Author: nbbeeken

test/unit/assorted/server_discovery_and_monitoring.spec.test.ts

@@ -214,7 +214,16 @@ describe('Server Discovery and Monitoring (spec)', function () {
           .stub(Topology.prototype, 'selectServer')
           .callsFake(async function (_selector, _options) {
             topologySelectServers.restore();
-            return fakeServer();
+
+            const fakeServer = {
+              s: { state: 'connected' },
+              removeListener: () => true,
+              pool: {
+                checkOut: async () => ({}),
+                checkIn: () => undefined
+              }
+            };
+            return fakeServer;
           });
       });
 

test/unit/assorted/server_discovery_and_monitoring.test.ts

@@ -31,7 +31,16 @@ describe('Server Discovery and Monitoring', function () {
       .stub(Topology.prototype, 'selectServer')
       .callsFake(async function (_selector, _options) {
         topologySelectServer.restore();
-        return fakeServer();
+
+        const fakeServer = {
+          s: { state: 'connected' },
+          removeListener: () => true,
+          pool: {
+            checkOut: async () => ({}),
+            checkIn: () => undefined
+          }
+        };
+        return fakeServer;
       });
 
     events = [];

test/unit/assorted/server_selection_spec_helper.js

@@ -105,7 +105,16 @@ export async function executeServerSelectionTest(testDefinition) {
     .stub(Topology.prototype, 'selectServer')
     .callsFake(async function () {
       topologySelectServers.restore();
-      return fakeServer();
+
+      const fakeServer = {
+        s: { state: 'connected' },
+        removeListener: () => true,
+        pool: {
+          checkOut: async () => ({}),
+          checkIn: () => undefined
+        }
+      };
+      return fakeServer;
     });
 
   await topology.connect();

test/unit/sdam/topology.test.ts

@@ -26,6 +26,7 @@ import { Topology } from '../../../src/sdam/topology';
 import { TopologyDescription } from '../../../src/sdam/topology_description';
 import { TimeoutContext } from '../../../src/timeout';
 import { isHello, ns } from '../../../src/utils';
+import { ConnectionPool } from '../../mongodb';
 import * as mock from '../../tools/mongodb-mock/index';
 import { topologyWithPlaceholderClient } from '../../tools/utils';