more invalid tests

Author: JohnnyBoyV

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js

@@ -30,6 +30,8 @@ test("Should throw an error for invalid card strings", () => {
   expect(() => getCardValue("1♠")).toThrow("Invalid card");
   expect(() => getCardValue("A-Z")).toThrow("Invalid card");
   expect(() => getCardValue("Joker")).toThrow("Invalid card");
+  expect(() => getCardValue("")).toThrow("Invalid card");
+  expect(() => getCardValue("5⋆")).toThrow("Invalid card");
 });
 
 // To learn how to test whether a function throws an error as expected in Jest,