Added edge case and invalid input tests and updated function to pass

Author: i786m

Sprint-3/2-practice-tdd/repeat.js

@@ -1,6 +1,12 @@
 function repeat(str, count) {
-  if (count < 0) {
-    return "Count must be a non-negative integer"
+  if ( arguments.length !== 2) {
+    return "Function requires exactly 2 arguments";
+  }
+  if (typeof str !== "string") {
+    return "First argument must be a string";
+  }
+  if (!Number.isInteger(count) || count < 0) {
+    return "Second argument must be a non-negative integer";
   }
   return str.repeat(count);
 }

Sprint-3/2-practice-tdd/repeat.test.js

@@ -46,5 +46,56 @@ test("should return empty string if count is 0", () => {
 test("should return error message for negative count", () => {
   const str = "hello";
   const count = -2;
-  expect(repeat(str, count)).toEqual("Count must be a non-negative integer");
-});
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+});
+
+// invalid input tests
+test("should return error message for non-integer count", () => {
+  const str = "hello";
+  const count = 2.5;
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+});
+
+test("should return error message for non-string input", () => {
+  const str = 123;
+  const count = 3;
+  expect(repeat(str, count)).toEqual("First argument must be a string");
+});
+
+test("should return error message for non-string input with invalid count", () => {
+  const str = { text: "hello" };
+  const count = -2;
+  expect(repeat(str, count)).toEqual("First argument must be a string");
+});
+
+test("should return error message for string input with non number count", () => {
+  const str = "hello";
+  const count = "3";
+  const count2 = [];
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+  expect(repeat(str, count2)).toEqual("Second argument must be a non-negative integer");
+});
+
+test("should return error message for string input with NaN count", () => {
+  const str = "hello";
+  const count = NaN;
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+});
+
+test("should return error message for string input with null count", () => {
+  const str = "hello";
+  const count = null;
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+});
+
+test("should return error message for string input with undefined count", () => {
+  const str = "hello";
+  const count = undefined;
+  expect(repeat(str, count)).toEqual("Second argument must be a non-negative integer");
+});
+
+test('should have the correct amount of arguments', () => { 
+  expect(repeat('hello')).toEqual("Function requires exactly 2 arguments");
+  expect(repeat("hello", 3, 3)).toEqual("Function requires exactly 2 arguments"); 
+ })
+