test(bot): implement tests on the regex filter using jest

jest.config.js

@@ -0,0 +1,11 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} **/
+module.exports = {
+  testEnvironment: "node",
+  transform: {
+    "^.+\.tsx?$": ["ts-jest",{}],
+  },
+  testPathIgnorePatterns: [
+    "node_modules/",
+    "generated/"
+  ]
+};

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.5",
   "main": "index.js",
   "scripts": {
+    "test": "jest",
     "start": "node ./dist/app.js",
     "dryrun": "npx ts-node -r tsconfig-paths/register ./src/app.ts",
     "dev": "npm run build:client && npm run dryrun",
@@ -30,6 +31,7 @@
     "@types/dropzone": "^5.7.9",
     "@types/ejs": "^3.1.5",
     "@types/express": "^5.0.1",
+    "@types/jest": "^29.5.14",
     "@types/jquery": "^3.5.32",
     "@types/lodash": "^4.17.16",
     "@types/node": "^22.14.1",
@@ -37,6 +39,7 @@
     "autoprefixer": "^10.4.21",
     "esbuild": "^0.25.2",
     "fast-glob": "^3.3.3",
+    "jest": "^29.7.0",
     "nodemon": "^3.1.9",
     "postcss": "^8.5.3",
     "postcss-cli": "^11.0.1",
@@ -44,6 +47,7 @@
     "prisma": "^6.6.0",
     "standard-version": "^9.5.0",
     "tailwindcss": "^4.1.4",
+    "ts-jest": "^29.3.2",
     "ts-node": "^10.9.2",
     "tsc-alias": "^1.8.15",
     "typescript": "^5.8.3"

src/bot/__tests__/filters.test.ts

@@ -0,0 +1,70 @@
+import * as filters from "../filter";
+import prisma, { MatchingAlgorithms } from "../../../generated/prisma";
+
+const templateFilter: prisma.Filter = {
+    id: 0,
+    guild_id: "",
+    name: "",
+    value: "",
+    matching_algorithm: MatchingAlgorithms.ALL,
+    is_insensitive: false,
+    is_whitelist: false,
+    created_at: new Date(),
+    updated_at: new Date()
+
+};
+
+describe("Regex Matching Test", () => {
+    const filter: prisma.Filter = {
+        ...templateFilter,
+        name: "Block American Politics",
+        value: String.raw`\b(trump|biden|democrat|republican|gop|dnc|kamala|harris)\b`,
+        is_insensitive: true
+    }
+
+    const testCases: { input: string, expected: boolean }[] = [
+        {
+            input: "Republicans float new tax breaks for tips, local taxes in Trump budget package",
+            expected: true  // Contains 'republican' and 'trump'.
+        },
+        {
+            input: "Biden’s Approval Rating Dips Amid Economic Concerns",
+            expected: true  // Contains 'biden'.
+        },
+        {
+            input: "GOP Governors Call for Tougher Border Security Measures",
+            expected: true  // Contains 'gop'.
+        },
+        {
+            input: "Biden Announces New Initiative to Tackle Climate Change",
+            expected: true  // Contains 'biden'.
+        },
+        {
+            input: "Biden Announces New Initiative to Tackle Climate Change",
+            expected: true  // Contains 'biden'.
+        },
+        {
+            input: "Joe Biden gives thoughts on Donald Trump, Vladimir Putin, Ukraine, and Kamala Harris in first interview since leaving office",
+            expected: true  // Contains 'biden', 'trump', 'kamala' and 'harris'.
+        },
+        {
+            input: "UK Prime Minister Keir Starmer hails limited US-UK trade deal, but 10% duties remain",
+            expected: false
+        },
+        {
+            input: "Scientists discover new species of fish in Pacific Ocean",
+            expected: false
+        },
+        {
+            input: "Federal Reserve signals cautious approach to interest rate cuts in 2025",
+            expected: false
+        }
+    ];
+
+    for (const { input, expected } of testCases) {
+        test(`Test input: ${input}`, () => {
+            const result = filters.regex(filter, input);
+            expect(result).toBe(expected);
+        });
+    }
+});