Implement repeatStr function with error handling and add tests for various cases

Author: Oussama-Mouggal

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

@@ -1,5 +1,10 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be non-negative");
+  }
+  if (count === 0) {
+    return "";
+  }
+  return str.repeat(count);
 }
-
 module.exports = repeatStr;

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

@@ -15,7 +15,28 @@ test("should repeat the string count times", () => {
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("hellohellohello");
 });
+// Case: handle count of 1:
+test("should return the string when count is 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
+
+// Case: Handle count of 0:
+test("should return an empty string when count is 0", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
+// Case: Handle negative count:
+test("should throw an error when count is negative", () => {
+  const str = "hello";
+  const count = -1;
+  expect(() => repeatStr(str, count)).toThrow();
+});
 // Case: handle count of 1:
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,