Implement repeat function with parameters and error handling

- Added str and count parameters to repeat function
- Used String.repeat to repeat str count times
- Throws error if count is negative
- Added tests for count = 1, 0, and negative values

Author: HoussamLh

Sprint-3/3-mandatory-practice/implement/repeat.js

@@ -1,5 +1,8 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be non-negative");
+  }
+  return str.repeat(count);
 }
 
-module.exports = repeat;
+module.exports = repeat;

Sprint-3/3-mandatory-practice/implement/repeat.test.js

@@ -16,17 +16,46 @@ test("should repeat the string count times", () => {
     expect(repeatedStr).toEqual("hellohellohello");
     });
 
+    const repeat = require("./repeat");
+
+//   test("should repeat the string count times", () => {
+//    expect(repeat("hello", 3)).toEqual("hellohellohello");
+//    });
+
 // case: handle Count of 1:
 // Given a target string str and a count equal to 1,
 // When the repeat function is called with these inputs,
 // Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
 
+test("should return original string when count is 1", () => {
+  expect(repeat("hello", 1)).toEqual("hello");
+});
+
+
 // case: Handle Count of 0:
 // Given a target string str and a count equal to 0,
 // When the repeat function is called with these inputs,
 // Then it should return an empty string, ensuring that a count of 0 results in an empty output.
 
+test("should return empty string when count is 0", () => {
+  expect(repeat("hello", 0)).toEqual("");
+});
+
 // case: Negative Count:
 // Given a target string str and a negative integer count,
 // When the repeat function is called with these inputs,
 // Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+
+test("should throw error for negative count", () => {
+  expect(() => repeat("hello", -1)).toThrow("Count must be non-negative");
+});
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