Test coins contains more than 0 coins

test/index.js

@@ -4,3 +4,7 @@ import coins from '../';
 test('coins is an array', t => {
 	t.true(Array.isArray(coins));
 });
+
+test('coins contains more than 0 coins', t => {
+	t.true(coins.length > 0);
+});