From 81f15a7df6972393893298019b3346fd8b970a02 Mon Sep 17 00:00:00 2001
From: "Kamat, Trivikram" <16024985+trivikr@users.noreply.github.com>
Date: Tue, 23 Jun 2026 20:15:59 -0700
Subject: [PATCH] test: limit young generation in heap snapshot tests

Set maxYoungGenerationSizeMb for the worker heap snapshot tests so the
temporary heap limit used while writing the snapshot is deterministic.
This keeps the tests focused on verifying that one snapshot is written
before the worker reports ERR_WORKER_OUT_OF_MEMORY.

Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: openai:gpt-5.5
---
 .../workload/grow-worker-and-set-near-heap-limit.js        | 7 +++++--
 test/fixtures/workload/grow-worker.js                      | 7 +++++--
 .../test-heapsnapshot-near-heap-limit-by-api-in-worker.js  | 1 +
 test/parallel/test-heapsnapshot-near-heap-limit-worker.js  | 1 +
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/test/fixtures/workload/grow-worker-and-set-near-heap-limit.js b/test/fixtures/workload/grow-worker-and-set-near-heap-limit.js
index 598088bcf90a..b7a379e24b4d 100644
--- a/test/fixtures/workload/grow-worker-and-set-near-heap-limit.js
+++ b/test/fixtures/workload/grow-worker-and-set-near-heap-limit.js
@@ -9,7 +9,10 @@ new Worker(path.join(__dirname, 'grow-and-set-near-heap-limit.js'), {
   },
   resourceLimits: {
     maxOldGenerationSizeMb:
-      parseInt(process.env.TEST_OLD_SPACE_SIZE) || 20
-  }
+      parseInt(process.env.TEST_OLD_SPACE_SIZE) || 20,
+    ...(process.env.TEST_YOUNG_SPACE_SIZE !== undefined && {
+      maxYoungGenerationSizeMb: parseInt(process.env.TEST_YOUNG_SPACE_SIZE),
+    }),
+  },
 });
 
diff --git a/test/fixtures/workload/grow-worker.js b/test/fixtures/workload/grow-worker.js
index 092d8f27751f..c80a5cd7b911 100644
--- a/test/fixtures/workload/grow-worker.js
+++ b/test/fixtures/workload/grow-worker.js
@@ -9,6 +9,9 @@ new Worker(path.join(__dirname, 'grow.js'), {
   ],
   resourceLimits: {
     maxOldGenerationSizeMb:
-      parseInt(process.env.TEST_OLD_SPACE_SIZE) || 20
-  }
+      parseInt(process.env.TEST_OLD_SPACE_SIZE) || 20,
+    ...(process.env.TEST_YOUNG_SPACE_SIZE !== undefined && {
+      maxYoungGenerationSizeMb: parseInt(process.env.TEST_YOUNG_SPACE_SIZE),
+    }),
+  },
 });
diff --git a/test/parallel/test-heapsnapshot-near-heap-limit-by-api-in-worker.js b/test/parallel/test-heapsnapshot-near-heap-limit-by-api-in-worker.js
index ac55933a4712..b7f4946c060c 100644
--- a/test/parallel/test-heapsnapshot-near-heap-limit-by-api-in-worker.js
+++ b/test/parallel/test-heapsnapshot-near-heap-limit-by-api-in-worker.js
@@ -22,6 +22,7 @@ const env = {
     env: {
       TEST_SNAPSHOTS: 1,
       TEST_OLD_SPACE_SIZE: 50,
+      TEST_YOUNG_SPACE_SIZE: 16,
       ...env
     }
   });
diff --git a/test/parallel/test-heapsnapshot-near-heap-limit-worker.js b/test/parallel/test-heapsnapshot-near-heap-limit-worker.js
index 46744cbd44d8..2701499c53bf 100644
--- a/test/parallel/test-heapsnapshot-near-heap-limit-worker.js
+++ b/test/parallel/test-heapsnapshot-near-heap-limit-worker.js
@@ -20,6 +20,7 @@ const env = {
     env: {
       TEST_SNAPSHOTS: 1,
       TEST_OLD_SPACE_SIZE: 50,
+      TEST_YOUNG_SPACE_SIZE: 16,
       ...env
     }
   });