London | Emmanuel Gessessew | Module-Structuring-and-Testing-Data | sprint 3| WEEK 3

Sprint-3/implement/get-card-value.js

@@ -46,3 +46,4 @@ function getCardValue(card) {
 }
 
 
+module.exports = getCardValue;

Sprint-3/implement/getCardValue.test.js

@@ -0,0 +1,33 @@
+test('should return the numeric value for cards 2 to 9', function() {
+    for (let card = 2; card <= 9; card++) {
+        expect(getCardValue(card)).toBe(card);
+    }
+});
+
+test('should return 10 for face cards "10", "J", "Q", "K"', function() {
+    expect(getCardValue("10")).toBe(10);
+    expect(getCardValue("J")).toBe(10);
+    expect(getCardValue("Q")).toBe(10);
+    expect(getCardValue("K")).toBe(10);
+});
+
+test('should return 11 for the Ace card "A"', function() {
+    expect(getCardValue("A")).toBe(11);
+});
+
+test('should throw an error for invalid card types (e.g., "Z")', function() {
+    expect(() => getCardValue("Z")).toThrow("Invalid card");
+});
+
+test('should throw an error for invalid numeric cards (e.g., 1, 0, -3)', function() {
+    expect(() => getCardValue(1)).toThrow("Invalid card");
+    expect(() => getCardValue(0)).toThrow("Invalid card");
+    expect(() => getCardValue(-3)).toThrow("Invalid card");
+});
+
+test('should throw an error for non-numeric and non-string inputs', function() {
+    expect(() => getCardValue(null)).toThrow("Invalid card");
+    expect(() => getCardValue(undefined)).toThrow("Invalid card");
+    expect(() => getCardValue([])).toThrow("Invalid card");
+    expect(() => getCardValue({})).toThrow("Invalid card");
+});