Fix jest config

Author: anttiviljami

jest.config.js

@@ -6,4 +6,6 @@ module.exports = {
   testTimeout: 15000,
   verbose: true,
   silent: true,
+  setupFilesAfterEnv: ['<rootDir>/src/__tests__/setup.ts'],
+  forceExit: true,
 };

src/__tests__/setup.ts

@@ -0,0 +1,27 @@
+// oclif registers listeners on process streams at module load time. Since Jest
+// re-initialises modules per test file (even with -i), listeners accumulate
+// across suites and exceed Node's default limit of 10.
+//
+// Top-level code here runs before the test file's imports, so we snapshot
+// the current listeners now and restore after each suite in afterAll.
+const EVENTS = ['error', 'resize', 'close', 'finish', 'drain'];
+const streams = [process.stdout, process.stderr, process.stdin] as const;
+
+const snapshots = new Map(
+  streams.map((stream) => [
+    stream,
+    new Map(EVENTS.map((event) => [event, [...(stream as NodeJS.EventEmitter).listeners(event)]])),
+  ]),
+);
+
+afterAll(() => {
+  for (const [stream, snapshot] of snapshots) {
+    for (const [event, saved] of snapshot) {
+      for (const listener of (stream as NodeJS.EventEmitter).listeners(event)) {
+        if (!saved.includes(listener)) {
+          (stream as NodeJS.EventEmitter).removeListener(event, listener as (...args: unknown[]) => void);
+        }
+      }
+    }
+  }
+});