Add tests for empty strings. Update test names

Author: MahirShah300

practice-tdd/repeat-str.test.js

@@ -16,6 +16,13 @@ test("should repeat the string count times", () => {
   expect(repeatedStr).toEqual("hellohellohello");
 });
 
+test("should return empty string when str is empty and count = 3", () => {
+  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,
@@ -28,23 +35,43 @@ test("should repeat the string count times, count = 1", () => {
   expect(repeatedStr).toEqual("hello");
 });
 
+test("should return empty string when str is empty and count = 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,
 // Then it should return an empty string.
-test("should return empty string, count = 0", () => {
+test("should return empty string when count = 0", () => {
   const str = "hello";
   const count = 0;
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("");
 });
 
+test("should return empty string when string is empty and count = 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,
 // Then it should throw an error, as negative counts are not valid.
-test("should return error, count < 0", () => {
+test("should return error when count < 0", () => {
   const str = "hello";
   const count = -5;
   expect(() => repeatStr(str, count)).toThrow(/Error/);
 });
+
+test("should return error when count < 0 and  string is empty", () => {
+  const str = "";
+  const count = -5;
+  expect(() => repeatStr(str, count)).toThrow(/Error/);
+});