1 files changed, 120 insertions, 0 deletions
diff --git a/cli/tests/unit/timers_test.ts b/cli/tests/unit/timers_test.ts
index fc6f9af4d..ec9b6f757 100644
--- a/cli/tests/unit/timers_test.ts
+++ b/cli/tests/unit/timers_test.ts
@@ -9,6 +9,8 @@ import {
   unreachable,
 } from "./test_util.ts";
 
+const decoder = new TextDecoder();
+
 Deno.test(async function functionParameterBindingSuccess() {
   const promise = deferred();
   let count = 0;
@@ -573,3 +575,121 @@ Deno.test(
     await p;
   },
 );
+
+async function execCode(code: string) {
+  const p = Deno.run({
+    cmd: [
+      Deno.execPath(),
+      "eval",
+      "--unstable",
+      code,
+    ],
+    stdout: "piped",
+  });
+  const [status, output] = await Promise.all([p.status(), p.output()]);
+  p.close();
+  return [status.code, decoder.decode(output)];
+}
+
+Deno.test({
+  name: "unrefTimer",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      const timer = setTimeout(() => console.log("1"));
+      Deno.unrefTimer(timer);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - mix ref and unref 1",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      const timer1 = setTimeout(() => console.log("1"), 200);
+      const timer2 = setTimeout(() => console.log("2"), 400);
+      const timer3 = setTimeout(() => console.log("3"), 600);
+      Deno.unrefTimer(timer3);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "1\n2\n");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - mix ref and unref 2",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      const timer1 = setTimeout(() => console.log("1"), 200);
+      const timer2 = setTimeout(() => console.log("2"), 400);
+      const timer3 = setTimeout(() => console.log("3"), 600);
+      Deno.unrefTimer(timer1);
+      Deno.unrefTimer(timer2);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "1\n2\n3\n");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - unref interval",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      let i = 0;
+      const timer1 = setInterval(() => {
+        console.log("1");
+        i++;
+        if (i === 5) {
+          Deno.unrefTimer(timer1);
+        }
+      }, 10);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "1\n1\n1\n1\n1\n");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - unref then ref 1",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      const timer1 = setTimeout(() => console.log("1"), 10);
+      Deno.unrefTimer(timer1);
+      Deno.refTimer(timer1);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "1\n");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - unref then ref",
+  permissions: { run: true },
+  fn: async () => {
+    const [statusCode, output] = await execCode(`
+      const timer1 = setTimeout(() => {
+        console.log("1");
+        Deno.refTimer(timer2);
+      }, 10);
+      const timer2 = setTimeout(() => console.log("2"), 20);
+      Deno.unrefTimer(timer2);
+    `);
+    assertEquals(statusCode, 0);
+    assertEquals(output, "1\n2\n");
+  },
+});
+
+Deno.test({
+  name: "unrefTimer - invalid calls do nothing",
+  permissions: { run: true },
+  fn: () => {
+    Deno.unrefTimer(NaN);
+    Deno.refTimer(NaN);
+  },
+});