Add unit and integration tests for all PaperBlog function units

.gitignore

@@ -39,3 +39,8 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 next-env.d.ts
+
+# python
+__pycache__/
+*.py[cod]
+.pytest_cache/

jest.config.ts

@@ -0,0 +1,19 @@
+import type { Config } from "jest";
+import nextJest from "next/jest.js";
+
+const createJestConfig = nextJest({
+  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
+  dir: "./",
+});
+
+const config: Config = {
+  coverageProvider: "v8",
+  testEnvironment: "jsdom",
+  setupFilesAfterEnv: ["<rootDir>/jest.setup.ts"],
+  moduleNameMapper: {
+    "^@/(.*)$": "<rootDir>/src/$1",
+  },
+  testMatch: ["<rootDir>/src/__tests__/**/*.test.{ts,tsx}"],
+};
+
+export default createJestConfig(config);

jest.setup.ts

@@ -0,0 +1 @@
+import "@testing-library/jest-dom";