From 3b4900193ba4a6ee40b3d5935650b5f68baf0729 Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Sat, 1 Oct 2022 16:02:29 -0700
Subject: Fix `setTimeout(0)`, improve test coverage slightly, reduce memory
 usage of timers

---
 test/bun.js/setTimeout.test.js | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'test/bun.js')

diff --git a/test/bun.js/setTimeout.test.js b/test/bun.js/setTimeout.test.js
index 79039a568..a899867df 100644
--- a/test/bun.js/setTimeout.test.js
+++ b/test/bun.js/setTimeout.test.js
@@ -41,3 +41,43 @@ it("clearTimeout", async () => {
   });
   expect(called).toBe(false);
 });
+
+it("setTimeout(() => {}, 0)", async () => {
+  var called = false;
+  setTimeout(() => {
+    called = true;
+  }, 0);
+  await new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve();
+    }, 10);
+  });
+  expect(called).toBe(true);
+  var ranFirst = -1;
+  setTimeout(() => {
+    if (ranFirst === -1) ranFirst = 1;
+  }, 1);
+  setTimeout(() => {
+    if (ranFirst === -1) ranFirst = 0;
+  }, 0);
+
+  await new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve();
+    }, 10);
+  });
+  expect(ranFirst).toBe(0);
+
+  ranFirst = -1;
+
+  const id = setTimeout(() => {
+    ranFirst = 0;
+  }, 0);
+  clearTimeout(id);
+  await new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve();
+    }, 10);
+  });
+  expect(ranFirst).toBe(-1);
+});
-- 
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