fix test

packages/fuels/test/features/dev-2.test.ts

@@ -4,8 +4,7 @@ import { tmpdir } from 'os';
 import path from 'path';
 
 import { deferPromise, randomUUID } from '../../src';
-import { findChildProcessPid } from '../utils/findChildProcessPid';
-import { isProcessRunning } from '../utils/isProcessRunning';
+import { findChildProcessPid, waitProcessEnd } from '../utils/processUtils';
 
 function runInit() {
   const fuelsPath = path.join(process.cwd(), 'packages/fuels');
@@ -72,7 +71,8 @@ describe('dev', () => {
 
       await devExited.promise;
 
-      expect(isProcessRunning(fuelCorePid)).toBe(false);
+      // if it finishes before timeout, it means the process was killed successfully
+      await waitProcessEnd(fuelCorePid);
     },
     { timeout: 15000 }
   );

packages/fuels/test/utils/processUtils.ts

@@ -0,0 +1,52 @@
+import { sleep } from '@fuel-ts/utils';
+import { execSync } from 'child_process';
+
+export function findChildProcessPid(
+  parentPid: number,
+  childProcessName: string
+): number | undefined {
+  const childProcesses = execSync(`ps --ppid ${parentPid} -o pid,cmd --no-headers || true`)
+    .toString()
+    .split('\n')
+    .map((s) => s.trim())
+    .filter((s) => s !== '');
+
+  for (const cp of childProcesses) {
+    const [pid, name] = cp.split(' ');
+    if (name.indexOf(childProcessName) !== -1) {
+      return +pid;
+    }
+    const childPid = findChildProcessPid(+pid, childProcessName);
+    if (childPid) {
+      return childPid;
+    }
+  }
+
+  return undefined;
+}
+
+function isProcessRunning(pid: number) {
+  try {
+    // Check if the process exists
+    process.kill(pid, 0);
+    return true; // If no error, the process is running
+  } catch (e) {
+    const error = e as Error & { code: string };
+    // Error codes:
+    // ESRCH: No such process
+    // EPERM: Permission denied (you don't have permissions to check)
+    if (error.code === 'ESRCH') {
+      return false; // No such process
+    }
+    if (error.code === 'EPERM') {
+      return true; // Process exists, but we don't have permission to send a signal
+    }
+    throw error; // Some other unexpected error
+  }
+}
+
+export async function waitProcessEnd(pid: number) {
+  while (isProcessRunning(pid)) {
+    await sleep(100);
+  }
+}