Prisma (#2)

feat: added Prisma

src/utils/addition.test.ts

@@ -1,8 +1,17 @@
+import { randomUUID } from 'crypto';
 import { addition } from './addition';
 
+jest.mock('../database/database', () => ({
+  createAddition: jest.fn((value: number) => ({
+    id: randomUUID(),
+    datetime: new Date(),
+    value
+  }))
+}));
+
 describe('call', () => {
   it('returns the input value increased by one', async () => {
-    const response = addition(3);
+    const response = await addition(3);
 
     expect(response).toBe(4);
   });

src/utils/addition.ts

@@ -1,11 +1,14 @@
+import { createAddition } from '../database/database';
 import { logger } from './logger';
 
 /**
- * Format a response message containing a user input.
+ * Increase the user imput value by one, and creates an Addition record with that value.
  * @param number - The user input value.
  * @returns The value increased by one.
  */
-export function addition(value: number) {
+export async function addition(value: number) {
   logger.info(`addition(${value})`);
+  await createAddition(value);
+
   return value + 1;
 }

src/utils/clearDatabase.ts

@@ -0,0 +1,14 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+/**
+ * Clear the database of all records.
+ */
+export const clearDatabase = async () => {
+  await prisma.addition.deleteMany({});
+};
+
+global.beforeAll(async () => {
+  await clearDatabase();
+});