test: deflake test-common-expect-warning

The subprocess might exit before the data is flushed. Run the assertion after the `'end'` event is emitted. PR-URL: #42046 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Darshan Sen <[email protected]>
nodejs · Feb 24, 2022 · 626367c · 626367c
1 parent 663a669
commit 626367c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/test/parallel/test-common-expect-warning.js b/test/parallel/test-common-expect-warning.js
@@ -36,9 +36,11 @@ if (process.argv[2] !== 'child') {
     child.stderr.on('data', (data) => {
       stderr += data;
     });
+    child.stderr.on('end', common.mustCall(() => {
+      assert.match(stderr, /Unexpected extra warning received/);
+    }));
     child.on('exit', common.mustCall((status) => {
       assert.notStrictEqual(status, 0);
-      assert.match(stderr, /Unexpected extra warning received/);
     }));
   }
 } else {