A game told: twenty-seven written moves stepped through on the boards with a callout wherever there is something to see, and a composer to write the next one

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CCLa2PaEeCj8njQZSWGqHx

src/lib/game/lessons.test.ts

@@ -61,3 +61,22 @@ describe('the lessons', () => {
 		void other;
 	});
 });
+
+describe('the game told', () => {
+	it('plays through the engine from the opening to a checkmate, and every callout sits on a move', async () => {
+		const { toldStates, TOLD_MOVES, CALLOUTS } = await import('./told');
+		const states = toldStates();
+		expect(states).toHaveLength(TOLD_MOVES.length + 1);
+		const last = states[states.length - 1];
+		expect(last.end).toBe('mate');
+		expect(last.over?.winner).toBe('A');
+		for (const n of Object.keys(CALLOUTS).map(Number)) expect(n).toBeLessThanOrEqual(TOLD_MOVES.length);
+		// The things the callouts say happened.
+		expect(last.moves[8].captured).toBe('R');
+		expect(last.moves[16].kind).toBe('B');
+		expect(last.moves[20].captured).toBe('H');
+		expect(last.moves[23].captured).toBe('H');
+		expect(last.moves[26].captured).toBe('S');
+		expect(last.moves[26].check).toBe(true);
+	});
+});