added string length requirement to card value test

Author: miriamjorna

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

@@ -22,11 +22,15 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  
   if (typeof card !== "string") {
     throw new Error("Card must be a string");
   }
 
+   if (card.length < 2) {
+    throw new Error("Card must have at least two characteristics");
+  }
+
   const rank = card.slice(0, -1);
   const suit = card.slice(-1);
 

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("11♠")).toThrow("Invalid card format");
   expect(() => getCardValue("A♤")).toThrow("Invalid card format");
   expect(() => getCardValue(123)).toThrow("Card must be a string");
+  expect(() => getCardValue(1)).toThrow("Card must have at least two characteristics");
+  expect(() => getCardValue("")).toThrow("Card must have at least two characteristics");
 });
 
 // https://jestjs.io/docs/expect#tothrowerror