Configured redis to flush before each test and changed default test

redis database

test/helpers/redis.js

@@ -0,0 +1,15 @@
+const {createClient} = require('../../services/redis');
+
+// Create a redis client to use for clearing the database.
+const client = createClient();
+
+module.exports.clearDB = () =>
+  new Promise((resolve, reject) =>
+    client.flushdb((err) => {
+      if (err) {
+        return reject(err);
+      }
+
+      return resolve();
+    })
+  );

test/server/redis.js

@@ -0,0 +1,3 @@
+const redis = require('../helpers/redis');
+
+beforeEach(() => redis.clearDB());