added web vendorsHEADmaster

1 files changed, 54 insertions, 0 deletions

diff --git a/preact/debug/test/browser/component-stack-2.test.js b/preact/debug/test/browser/component-stack-2.test.js
new file mode 100644
index 0000000..a9a75af
--- /dev/null
+++ b/preact/debug/test/browser/component-stack-2.test.js
@@ -0,0 +1,54 @@
+import { createElement, render, Component } from 'preact';
+import 'preact/debug';
+import { setupScratch, teardown } from '../../../test/_util/helpers';
+
+/** @jsx createElement */
+
+// This test is not part of component-stack.test.js to avoid it being
+// transpiled with '@babel/plugin-transform-react-jsx-source' enabled.
+
+describe('component stack', () => {
+	/** @type {HTMLDivElement} */
+	let scratch;
+
+	let errors = [];
+	let warnings = [];
+
+	beforeEach(() => {
+		scratch = setupScratch();
+
+		errors = [];
+		warnings = [];
+		sinon.stub(console, 'error').callsFake(e => errors.push(e));
+		sinon.stub(console, 'warn').callsFake(w => warnings.push(w));
+	});
+
+	afterEach(() => {
+		console.error.restore();
+		console.warn.restore();
+		teardown(scratch);
+	});
+
+	it('should print a warning when "@babel/plugin-transform-react-jsx-source" is not installed', () => {
+		function Foo() {
+			return <Thrower />;
+		}
+
+		class Thrower extends Component {
+			constructor(props) {
+				super(props);
+				this.setState({ foo: 1 });
+			}
+
+			render() {
+				return <div>foo</div>;
+			}
+		}
+
+		render(<Foo />, scratch);
+
+		expect(
+			warnings[0].indexOf('@babel/plugin-transform-react-jsx-source') > -1
+		).to.equal(true);
+	});
+});