Added Jest for testing both front and backend

server/test/helper.js

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+require('localenv');
+
+// test environment variables
+process.env.DATABASE_URL = process.env.DATABASE_URL_TEST;
+process.env.NODE_ENV = 'test';
+
+const Sequelize = require('sequelize');
+const sequelize = require('../sequelize').sequelize;
+const Umzug = require('umzug');
+
+const queryInterface = sequelize.getQueryInterface();
+
+function runMigrations() {
+  const umzug = new Umzug({
+    storage: 'sequelize',
+    storageOptions: {
+      sequelize,
+    },
+    migrations: {
+      params: [queryInterface, Sequelize],
+      path: './server/migrations',
+    },
+  });
+  umzug.up()
+  .then(() => {
+    sequelize.close();
+  });
+}
+
+runMigrations();

server/test/support.js

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+import { User } from '../models';
+import { sequelize } from '../sequelize';
+
+export function flushdb() {
+  const sql = sequelize.getQueryInterface();
+  const tables = Object.keys(sequelize.models).map((model) =>
+      sql.quoteTable(sequelize.models[model].getTableName()));
+  const query = `TRUNCATE ${tables.join(', ')} CASCADE`;
+
+  return sequelize.query(query);
+}
+
+const seed = async () => {
+  await User.create({
+    id: '86fde1d4-0050-428f-9f0b-0bf77f8bdf61',
+    email: 'user1@example.com',
+    username: 'user1',
+    name: 'User 1',
+    slackId: '123',
+    slackData: {
+      image_192: 'http://example.com/avatar.png',
+    },
+  });
+};
+
+export {
+  seed,
+  sequelize,
+};