1 files changed, 36 insertions, 0 deletions
diff --git a/preact/test/browser/lifecycles/componentDidMount.test.js b/preact/test/browser/lifecycles/componentDidMount.test.js
new file mode 100644
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--- /dev/null
+++ b/preact/test/browser/lifecycles/componentDidMount.test.js
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+import { createElement, render, Component } from 'preact';
+import { setupScratch, teardown } from '../../_util/helpers';
+
+/** @jsx createElement */
+
+describe('Lifecycle methods', () => {
+	/** @type {HTMLDivElement} */
+	let scratch;
+
+	beforeEach(() => {
+		scratch = setupScratch();
+	});
+
+	afterEach(() => {
+		teardown(scratch);
+	});
+
+	describe('#componentDidMount', () => {
+		it('is invoked after refs are set', () => {
+			const spy = sinon.spy();
+
+			class App extends Component {
+				componentDidMount() {
+					expect(spy).to.have.been.calledOnceWith(scratch.firstChild);
+				}
+
+				render() {
+					return <div ref={spy} />;
+				}
+			}
+
+			render(<App />, scratch);
+			expect(spy).to.have.been.calledOnceWith(scratch.firstChild);
+		});
+	});
+});