fix: add test dependencies

jest.config.js

@@ -0,0 +1,7 @@
+/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  setupFilesAfterEnv: ["<rootDir>/tests/jest.setup.ts"],
+  roots: ["<rootDir>/tests"],
+};

package.json

@@ -26,6 +26,7 @@
     "node-cache": "^5.1.2"
   },
   "devDependencies": {
+    "@types/jest": "^29.5.3",
     "@types/node": "^12.12.6",
     "@typescript-eslint/eslint-plugin": "^5.58.0",
     "@typescript-eslint/parser": "^5.58.0",
@@ -35,9 +36,11 @@
     "eslint-config-prettier": "^8.8.0",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-prettier": "^4.2.1",
+    "jest": "^29.6.1",
     "nock": "^13.2.0",
     "nodemon": "^2.0.15",
     "prettier": "^2.8.7",
+    "ts-jest": "^29.1.1",
     "ts-node": "^10.8.1",
     "typescript": "^4.2.3"
   }

src/validation.ts

@@ -2,7 +2,7 @@ import { PayloadType, ContractCallPayload, getAbi, addressToString, StacksTransa
 
 // rules for transaction sponsorship eligibility
 // customize this if you are forking this repo
-export async function validateTransaction(transaction: StacksTransaction) {
+export async function validateTransaction(transaction: StacksTransaction): Promise<boolean> {
   if (transaction.payload.payloadType !== PayloadType.ContractCall) {
     throw new Error('Transaction is not a contract call');
   }

tests/jest.setup.ts

@@ -0,0 +1,19 @@
+//mocking the use of env variables, even if .env file changes, it won't affect tests
+jest.mock("../config/config", () => {
+  return {
+    seed: "xxx",
+    password: "xxx",
+    numAddresses: 3,
+    maxFee: 10,
+  };
+});
+
+jest.mock("@stacks/transactions", () => {
+  return Object.assign(
+    {},
+    {
+      ...jest.requireActual("@stacks/transactions"),
+      callReadOnlyFunction: jest.fn(),
+    }
+  );
+});