yeepay-mcp

# Task: Fix Jest ESM Module Mocking Issue **Goal:** Resolve the failing integration tests (`npm test`) caused by Jest's inability to correctly mock ESM modules in the current project setup. **Status:** Pending **Coordinator:** TASK-CMD-20250420-011500 (Related to TypeScript Refactor) **Assigned To:** bug-fixer **Acceptance Criteria:** * The specific error `TypeError: mockedCreatePayment.mockClear is not a function` (and any related mocking errors) is resolved. * All integration tests in `tests/integration.test.ts` pass successfully when running `npm test`. * The solution maintains the project's ESM nature if possible, or clearly documents the necessary configuration changes (e.g., forcing CommonJS for tests via Babel/Jest config). * The solution is robust and doesn't introduce regressions. **Context Files:** * `project_journal/tasks/TASK-TS-REFACTOR-20250420-011500.md` (See Summary section for details on the issue and attempted fixes) * `jest.config.js` * `babel.config.cjs` * `tsconfig.json` * `package.json` * `tests/integration.test.ts` * `src/tools/createPayment.ts` (and its mock) * `src/tools/queryPayment.ts` (and its mock) * `tests/__mocks__/` directory **Checklist:** * `[⏳]` Review the "🔴 Unresolved Issue" section in `project_journal/tasks/TASK-TS-REFACTOR-20250420-011500.md` to understand the problem and previous attempts. * `[⏳]` Analyze `jest.config.js`, `babel.config.cjs`, and `tsconfig.json` for potential conflicts or misconfigurations related to ESM/TypeScript/Jest transformation. * `[⏳]` Examine the mocking implementation in `tests/integration.test.ts` and the mock files (`tests/__mocks__/`, `src/tools/__mocks__/`). * `[⏳]` Research current best practices and known issues for mocking ESM modules with Jest, TypeScript, and Babel. Consider Jest's experimental ESM support (`--experimental-vm-modules`). * `[⏳]` Attempt alternative mocking strategies or configuration adjustments (e.g., using `babel-plugin-transform-vite-meta-env`, adjusting Babel targets, modifying Jest `transform` config). * `[⏳]` If direct ESM mocking remains problematic, investigate forcing CommonJS transformation specifically for the test environment (e.g., using separate Babel env config for tests). * `[⏳]` Implement the chosen solution. * `[⏳]` Run `npm test` repeatedly to confirm the fix and ensure no new errors arise. 📣 * `[⏳]` Document the solution and any necessary configuration changes clearly. * `[⏳]` Commit the relevant file changes. --- **Log - 2025-04-20 01:35 AM (Bug Fixer)** * **Action:** Reviewed previous task log `TASK-TS-REFACTOR-20250420-011500.md`. * **Findings:** The core issue stems from Jest's interaction with the refactored ESM/TypeScript modules. Standard mocking techniques failed, resulting in `TypeError: mockedCreatePayment.mockClear is not a function`. Previous attempts to adjust Jest/Babel configurations were unsuccessful. * **Next Step:** Reproduce the error locally by running `npm test`. --- **Log - 2025-04-20 01:35 AM (Bug Fixer)** * **Action:** Executed `npm test`. * **Outcome:** **Success (Bug Reproduced)**. Tests failed with the expected error: `TypeError: mockedCreatePayment.mockClear is not a function` in `tests/integration.test.ts:54`. * **Next Step:** Diagnose the root cause by examining test setup, mock implementation, and Jest/Babel configurations. --- **Log - 2025-04-20 01:38 AM (Bug Fixer)** * **Action:** Modified `package.json` to remove `NODE_OPTIONS=--experimental-vm-modules` from test scripts. Modified `jest.config.js` to remove `extensionsToTreatAsEsm` and set `useESM: false` for `ts-jest`. Executed `npm test`. * **Outcome:** **Success!** All tests in `tests/integration.test.ts` passed. The original `TypeError` and subsequent `ReferenceError` are resolved. * **Regression Test:** Existing tests in `tests/integration.test.ts` serve as regression tests for the mocking configuration, confirming it now works correctly. No new tests specific to the configuration fix were added. --- **Status:** ✅ Complete **Outcome:** Success **Summary:** Resolved Jest ESM module mocking issues by configuring the entire test environment to run in CommonJS mode. This involved removing Jest's experimental ESM flags (`NODE_OPTIONS=--experimental-vm-modules`, `extensionsToTreatAsEsm`, `useESM: true`) and ensuring Babel converts TypeScript to CommonJS specifically for the test environment (`babel.config.cjs` with `modules: 'auto'` for `NODE_ENV=test`). **Root Cause:** The core issue stemmed from conflicts and limitations in Jest's experimental ESM support when combined with `ts-jest`, Babel transformations, and module mocking (especially factory mocks). Attempting to run tests in ESM mode while relying on transformations that might implicitly introduce CommonJS patterns (like `require` during mocking) led to errors (`TypeError: mockClear is not a function`, `ReferenceError: require is not defined`). Switching the test environment entirely to the more stable CommonJS mode resolved these conflicts. **References:** * `package.json` (modified test scripts) * `jest.config.js` (modified transform, removed ESM settings) * `babel.config.cjs` (ensured CJS conversion for test env) * `tests/integration.test.ts` (tests now pass) **Verification:** All tests passed successfully after applying the configuration changes (`npm test` exit code 0).