Updated 2-practice-tdd

Author: cjyuan

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

@@ -4,10 +4,18 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // continue testing and implementing getOrdinalNumber for additional cases
 // Write your tests using Jest - remember to run your tests often for continual feedback
 
-// Case 1: Identify the ordinal number for 1
-// When the number is 1,
-// Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
+// To ensure thorough testing, we need broad scenarios that cover all possible cases.
+// Listing individual values, however, can quickly lead to an unmanageable number of test cases.
+// Instead of writing tests for individual numbers, consider grouping all possible input values
+// into meaningful categories. Then, select representative samples from each category to test. 
+// This approach improves coverage and makes our tests easier to maintain.
+
+// Case 1: Numbers ending with 1 (but not 11)
+// When the number ends with 1, except those ending with 11,
+// Then the function should return a string by appending "st" to the number.
+test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
-});
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(31)).toEqual("131st");
+});

Sprint-3/2-practice-tdd/repeat-str.test.js

@@ -29,4 +29,4 @@ test("should repeat the string count times", () => {
 // case: 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 or return an appropriate error message, as negative counts are not valid.
+// Then it should throw an error, as negative counts are not valid.