add integration test

.gitignore

@@ -25,7 +25,8 @@ yarn-debug.log*
 yarn-error.log*
 
 # env files
-.env
+.env.development
+.env.test
 
 # vercel
 .vercel

jest.config.js

@@ -18,7 +18,7 @@ const customJestConfig = {
     "^@tests/(.*)$": "<rootDir>/tests/$1",
   },
   testEnvironment: "jest-environment-jsdom",
-  collectCoverageFrom: ["pages/api/**", "business-logic/**"],
+  collectCoverageFrom: ["business-logic/**"],
 };
 
 // createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async

package.json

@@ -11,8 +11,9 @@
     "prettier": "prettier --write .",
     "prepare": "husky install",
     "pre-commit": "lint-staged",
-    "test": "jest",
-    "test:coverage": "jest --coverage"
+    "test": "npm run test:db:reset && node --inspect node_modules/.bin/jest --runInBand --watch --testNamePattern",
+    "test:coverage": "npm run test:db:reset && node --inspect node_modules/.bin/jest --coverage",
+    "test:db:reset": "dotenv -e .env.test -- npx prisma migrate reset --force --skip-seed && dotenv -e .env.test -- npx prisma db push"
   },
   "dependencies": {
     "@headlessui/react": "^1.5.0",
@@ -38,6 +39,7 @@
     "@typescript-eslint/parser": "^5.10.0",
     "autoprefixer": "^10.4.2",
     "babel-jest": "^27.4.6",
+    "dotenv-cli": "^5.0.0",
     "eslint": "^8.7.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^4.0.0",

tests/business-logic/Job.test.ts

@@ -0,0 +1,28 @@
+import JobEntity from "@business-logic/Job";
+import { Job } from "@prisma/client";
+import { minimalSetup } from "@tests/helpers/setup";
+import { teardown } from "@tests/helpers/teardown";
+
+import prisma from "@helpers/prisma";
+
+beforeEach(async () => {
+  await teardown();
+});
+
+test("creates job successfully", async () => {
+  const { user } = await minimalSetup();
+
+  const requestParams = {
+    title: "Software Engineer",
+    description: "You write code.",
+  };
+
+  const entity = new JobEntity();
+  const result = await entity.create(requestParams, user.id);
+
+  const job = (await prisma.job.findUnique({ where: { id: result.id } })) as Job;
+
+  expect(job).not.toBeNull();
+  expect(job.title).toBe(requestParams.title);
+  expect(job.description).toBe(requestParams.description);
+});

tests/helpers/setup.ts

@@ -0,0 +1,19 @@
+import prisma from "@helpers/prisma";
+
+export async function minimalSetup() {
+  const company = await prisma.company.create({
+    data: {
+      name: "John Inc",
+    },
+  });
+  const user = await prisma.user.create({
+    data: {
+      name: "John Doe",
+      email: "john.doe@example.com",
+      password: "password",
+      companyId: company.id,
+    },
+  });
+
+  return { user, company };
+}

tests/helpers/teardown.ts

@@ -0,0 +1,5 @@
+import prisma from "@helpers/prisma";
+
+export async function teardown() {
+  return prisma.company.deleteMany({});
+}

tsconfig.json

@@ -8,7 +8,8 @@
       "@helpers/*": ["helpers/*"],
       "@pages/*": ["pages/*"],
       "@business-logic/*": ["business-logic/*"],
-      "@api-contracts/*": ["api-contracts/*"]
+      "@api-contracts/*": ["api-contracts/*"],
+      "@tests/*": ["tests/*"]
     },
     "skipLibCheck": true,
     "strict": true,