added more test cases to files as advised by the reviewer

Author: Mugs3

practice-tdd/count.test.js

@@ -37,3 +37,10 @@ test("should count multiple occurrences of a character", () => {
   const count = countChar(str, char);
   expect(count).toEqual(0);
 });
+
+test("should count multiple occurrences of a character", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

practice-tdd/get-ordinal-number.test.js

@@ -33,6 +33,12 @@ test("should append 'rd' for numbers ending with 3", () => {
 
 test("should append 'th' for numbers ending with 4, except those ending with 0", () => {
   expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(20)).toEqual("20th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
   expect(getOrdinalNumber(144)).toEqual("144th");
   expect(getOrdinalNumber(40)).toEqual("40th");
 });

practice-tdd/repeat-str.test.js

@@ -22,10 +22,10 @@ test("should repeat the string count times", () => {
 // Then it should return the original `str` without repetition.
 
 test("should repeat the string count times", () => {
-  const str = "hello";
+  const str = "Morning";
   const count = 1;
   const repeatedStr = repeatStr(str, count);
-  expect(repeatedStr).toEqual("hello");
+  expect(repeatedStr).toEqual("Morning");
 });
 
 // Case: Handle count of 0:
@@ -40,6 +40,13 @@ test("should repeat the string count times", () => {
   expect(repeatedStr).toEqual("");
 });
 
+test("should repeat the string count times", () => {
+  const str = "Hiya!";
+  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,
@@ -50,3 +57,10 @@ test("should throw an error, as negative counts are not valid", () => {
   const count = -1;
   expect(() => repeatStr(str, count)).toThrow("negative counts are not valid");
 });
+
+test("should repeat the string count times", () => {
+  const str = "";
+  const count = 4;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});