Add test cases using jest for the function repeat

Author: Iswanna

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

@@ -20,13 +20,31 @@ test("should repeat the string count times", () => {
 // 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 the original input with no repetition", () => {
+  const str = "milk";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual(str);
+})
 
 // 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 an empty string", () => {
+  const str = "rice";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).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 return an error message", () => {
+  const str = "food";
+  const count = -2;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Negative number invalid");
+})