tty.getWindowSize is not a function

src/subprocess/thread/worker.development.js

@@ -2,10 +2,5 @@
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const { register: registerTypescriptHandler } = require('ts-node');
 
-// monkeypatch Node.JS native TTY function
-// otherwise mocha native base reporter throws exception
-// inside a worker environment
-require('tty').getWindowSize = () => 75;
-
 registerTypescriptHandler();
 require(`${__dirname}/worker.ts`);

src/subprocess/thread/worker.ts

@@ -1,5 +1,9 @@
-import { workerData } from 'worker_threads';
+// monkeypatch Node.JS native TTY function
+// otherwise mocha native base reporter throws exception
+// inside a worker environment
+require('tty').getWindowSize = () => 75;
 
+import { workerData } from 'worker_threads';
 import { runMocha } from '../runner';
 import { WorkerData } from '../../main/thread/worker';
 

test/index.sh

@@ -65,6 +65,7 @@ test 'syntax errors' test/syntax-errors/index.js
 test '--require option support' test/require-option/index.sh
 test 'run programmatically (base API)' test/run-programmatically/callback/index.js
 test 'run programmatically (reporter.done is called)' test/run-programmatically/reporter-done/index.js
+test 'run programmatically (worker TTY)' test/run-programmatically/tty-worker/index.js
 test '--no-exit option support' test/reporter-end-no-exit/index.js
 test 'node native add-on' test/node-native-addon/index.sh
 test 'skip-suite' test/skip-suite/index.sh

test/run-programmatically/_spec/dummy.js

@@ -0,0 +1,5 @@
+describe('Dummy suite', () => {
+    it('should finish now', () => {
+        // pass
+    });
+});

test/run-programmatically/tty-worker/README

@@ -0,0 +1,2 @@
+Check that spec reporter can work in a non-TTY window
+TODO: this test fails when you run index.js from the terminal but doesn't fail when it's executed from tests/index.sh

test/run-programmatically/tty-worker/index.js

@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const MochaParallelTests = require('../../../dist/main/mocha').default;
+const mocha = new MochaParallelTests();
+
+mocha
+    .reporter('spec')
+    .addFile(`${__dirname}/../_spec/dummy.js`)
+    .run();
+
+process.on('unhandledRejection', (reason) => {
+    console.log(`Unhandled promise rejection: ${reason.stack}`);
+    process.exit(1);
+});