refactor: update test descriptions and add edge cases based on CJ review

Author: mahmoudshaabo1984

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

@@ -22,3 +22,17 @@ test("should count multiple occurrences of a character", () => {
 // And a character `char` that does not exist within `str`.
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of `char` were found.
+
+test("should return 0 when character does not exist in the string", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 0 when the string is completely empty", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -24,14 +24,17 @@ test("should append 'rd' for numbers ending with 3", () => {
 });
 
 // Case 4: The 'Teens' exceptions (11, 12, 13)
-test("should append 'th' for 11, 12, and 13", () => {
+test("should append 'th' for numbers ending with 11, 12, and 13", () => {
   expect(getOrdinalNumber(11)).toEqual("11th");
   expect(getOrdinalNumber(12)).toEqual("12th");
   expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(212)).toEqual("212th");
+  expect(getOrdinalNumber(313)).toEqual("313th");
 });
 
 // Case 5: General 'th' cases
-test("should append 'th' for other numbers", () => {
+test("should append 'th' for numbers ending in 0, 4, 5, 6, 7, 8, and 9", () => {
   expect(getOrdinalNumber(4)).toEqual("4th");
   expect(getOrdinalNumber(10)).toEqual("10th");
 });