added empty string tests for the repeatStr function

Author: marscancode

practice-tdd/repeat-str.test.js

@@ -16,6 +16,13 @@ test("should repeat the string count times", () => {
   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,
@@ -27,6 +34,13 @@ test("should return the original string when count equals 1", () => {
   expect(repeatedStr).toEqual("hello");
 });
 
+test("should return an empty string when count equals 1 and the string is empty", () => {
+  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,
@@ -37,6 +51,12 @@ test("should return an empty string when count equals 0", () => {
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("");
 });
+test("should return an empty string when count equals 0 and the string is empty", () => {
+  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`,
@@ -47,3 +67,9 @@ test("should throw an error when count is a negative number", () => {
   const count = -2;
   expect(() => repeatStr(str, count)).toThrow();
 });
+
+test("should throw an error when count is negative and the string is empty", () => {
+  const str = "";
+  const count = -2;
+  expect(() => repeatStr(str, count)).toThrow();
+});