1 files changed, 50 insertions, 0 deletions
diff --git a/preact/hooks/test/browser/useRef.test.js b/preact/hooks/test/browser/useRef.test.js
new file mode 100644
index 0000000..7d7a657
--- /dev/null
+++ b/preact/hooks/test/browser/useRef.test.js
@@ -0,0 +1,50 @@
+import { createElement, render } from 'preact';
+import { setupScratch, teardown } from '../../../test/_util/helpers';
+import { useRef } from 'preact/hooks';
+
+/** @jsx createElement */
+
+describe('useRef', () => {
+	/** @type {HTMLDivElement} */
+	let scratch;
+
+	beforeEach(() => {
+		scratch = setupScratch();
+	});
+
+	afterEach(() => {
+		teardown(scratch);
+	});
+
+	it('provides a stable reference', () => {
+		const values = [];
+
+		function Comp() {
+			const ref = useRef(1);
+			values.push(ref.current);
+			ref.current = 2;
+			return null;
+		}
+
+		render(<Comp />, scratch);
+		render(<Comp />, scratch);
+
+		expect(values).to.deep.equal([1, 2]);
+	});
+
+	it('defaults to undefined', () => {
+		const values = [];
+
+		function Comp() {
+			const ref = useRef();
+			values.push(ref.current);
+			ref.current = 2;
+			return null;
+		}
+
+		render(<Comp />, scratch);
+		render(<Comp />, scratch);
+
+		expect(values).to.deep.equal([undefined, 2]);
+	});
+});