test(browser): tap a role-based control end to end

every control on the page is an <li role="option">, the shape the
replay ui gives its step rows, and the spec carries no action of its
own: the property firing is the evidence the default enumeration offered
a tap on one.

test/browser/testdata/aria-roles/spec.ts

@@ -0,0 +1,16 @@
+import { always, extract, taps } from "@sanderling/spec";
+
+const selections = extract((s) => {
+  const el = s.ax.find({ id: "selected" });
+  return el ? parseInt(el.text, 10) || 0 : 0;
+}).named("selections");
+
+// Every control on the page is an <li role="option">, the shape the replay UI
+// gives its own step rows. Nothing else can move this counter, so the spec
+// carries no action of its own: this property firing IS the evidence that the
+// default enumeration offered a tap on a role-based control.
+const noRowWasEverSelected = always(() => selections.current === 0);
+
+export const properties = { noRowWasEverSelected };
+
+export const actionsRoot = taps;