Add empty string tests for repeatStr.

Author: abmhts

practice-tdd/repeat-str.test.js

@@ -15,7 +15,12 @@ test("should repeat the string count times", () => {
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("hellohellohello");
 });
-
+test("should return an empty string when repeating an empty string multiple times", () => {
+  const str = "";
+  const count = 3;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 // 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,
@@ -26,6 +31,12 @@ test("should return the original `str` without repetition", () => {
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("hello");
 });
+test("should return an empty string when the string is empty and count is 1", () => {
+  const str = "";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 // Case: Handle count of 0:
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
@@ -36,6 +47,12 @@ test("should return an empty string", () => {
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("");
 });
+test("should return an empty string when the string is empty and count is 0", () => {
+  const str = "";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 // Case: Handle negative count:
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,