1 files changed, 12 insertions, 0 deletions
diff --git a/preact-router/test_helpers/assert-clone-of.js b/preact-router/test_helpers/assert-clone-of.js
new file mode 100644
index 0000000..5a1a707
--- /dev/null
+++ b/preact-router/test_helpers/assert-clone-of.js
@@ -0,0 +1,12 @@
+import { cloneElement } from 'preact';
+
+export default function assertCloneOf({ Assertion }) {
+	if (Assertion.__assertCloneOfMounted === true) return;
+	Assertion.__assertCloneOfMounted = true;
+
+	Assertion.addMethod('cloneOf', function(routeJsx, { matches = {}, url = this._obj.props.path } = {}) {
+		const vnode = this._obj;
+		const clonedRoute = cloneElement(routeJsx, { url, matches, ...matches });
+		new chai.Assertion(vnode).to.be.eql(clonedRoute);
+	});
+}