add test

test/js/node/test/parallel/test-process-ref-unref.js

@@ -0,0 +1,60 @@
+'use strict';
+
+require('../common');
+
+const {
+  describe,
+  it,
+} = require('node:test');
+
+const {
+  strictEqual,
+} = require('node:assert');
+
+class Foo {
+  refCalled = 0;
+  unrefCalled = 0;
+  ref() {
+    this.refCalled++;
+  }
+  unref() {
+    this.unrefCalled++;
+  }
+}
+
+class Foo2 {
+  refCalled = 0;
+  unrefCalled = 0;
+  [Symbol.for('nodejs.ref')]() {
+    this.refCalled++;
+  }
+  [Symbol.for('nodejs.unref')]() {
+    this.unrefCalled++;
+  }
+}
+
+describe('process.ref/unref work as expected', () => {
+  it('refs...', () => {
+    // Objects that implement the new Symbol-based API
+    // just work.
+    const foo1 = new Foo();
+    const foo2 = new Foo2();
+    process.ref(foo1);
+    process.unref(foo1);
+    process.ref(foo2);
+    process.unref(foo2);
+    strictEqual(foo1.refCalled, 1);
+    strictEqual(foo1.unrefCalled, 1);
+    strictEqual(foo2.refCalled, 1);
+    strictEqual(foo2.unrefCalled, 1);
+
+    // Objects that implement the legacy API also just work.
+    const i = setInterval(() => {}, 1000);
+    strictEqual(i.hasRef(), true);
+    process.unref(i);
+    strictEqual(i.hasRef(), false);
+    process.ref(i);
+    strictEqual(i.hasRef(), true);
+    clearInterval(i);
+  });
+});