1 files changed, 47 insertions, 0 deletions
diff --git a/test/js/web/timers/setImmediate.test.js b/test/js/web/timers/setImmediate.test.js
new file mode 100644
index 000000000..9cd6fa1c9
--- /dev/null
+++ b/test/js/web/timers/setImmediate.test.js
@@ -0,0 +1,47 @@
+import { it, expect } from "bun:test";
+
+it("setImmediate", async () => {
+  var lastID = -1;
+  const result = await new Promise((resolve, reject) => {
+    var numbers = [];
+
+    for (let i = 0; i < 10; i++) {
+      const id = setImmediate((...args) => {
+        numbers.push(i);
+        if (i === 9) {
+          resolve(numbers);
+        }
+        try {
+          expect(args.length).toBe(1);
+          expect(args[0]).toBe(i);
+        } catch (err) {
+          reject(err);
+        }
+      }, i);
+      expect(id > lastID).toBe(true);
+      lastID = id;
+    }
+  });
+
+  for (let j = 0; j < result.length; j++) {
+    expect(result[j]).toBe(j);
+  }
+  expect(result.length).toBe(10);
+});
+
+it("clearImmediate", async () => {
+  var called = false;
+  const id = setImmediate(() => {
+    called = true;
+    expect(false).toBe(true);
+  });
+  clearImmediate(id);
+
+  // assert it doesn't crash if you call clearImmediate twice
+  clearImmediate(id);
+
+  await new Promise((resolve, reject) => {
+    setImmediate(resolve);
+  });
+  expect(called).toBe(false);
+});