Group tests together

Author: enjoy15

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

@@ -1,110 +1,45 @@
-const getOrdinalNumber = require("./get-ordinal-number");
-// In this week's prep, we started implementing getOrdinalNumber
 
-// continue testing and implementing getOrdinalNumber for additional cases
-// Write your tests using Jest - remember to run your tests often for continual feedback
+const getOrdinalNumber = require("./get-ordinal-number");
 
-// Case 1: Identify the ordinal number for 1
-// When the number is 1,
-// Then the function should return "1st"
+// To ensure thorough testing, we need broad scenario coverage. Listing individual values, however, can quickly lead to an unmanageable number of test cases.
+// Instead of writing tests for individual numbers, we group all possible input values into meaningful categories and select representative samples from each category to test. This approach improves coverage and makes our tests easier to maintain.
 
-test("should return '1st' for 1", () => {
+// Numbers ending in 1 (except those ending in 11): should append 'st'
+test("append 'st' to numbers ending in 1, except those ending in 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(101)).toEqual("101st");
 });
 
-// Case 2: Identify the ordinal number for 2
-// When the number is 2,
-// Then the function should return "2nd"
-
-test("should return '2nd' for 2", () => {
+// Numbers ending in 2 (except those ending in 12): should append 'nd'
+test("append 'nd' to numbers ending in 2, except those ending in 12", () => {
   expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
 });
 
-// Case 3: Identify the ordinal number for 3
-// When the number is 3,
-// Then the function should return "3rd"
-
-test("should return '3rd' for 3", () => {
+// Numbers ending in 3 (except those ending in 13): should append 'rd'
+test("append 'rd' to numbers ending in 3, except those ending in 13", () => {
   expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
 });
 
-// Case 4: Identify the ordinal number for 4
-// When the number is 4,
-// Then the function should return "4th"
-
-test("should return '4th' for 4", () => {
-  expect(getOrdinalNumber(4)).toEqual("4th");
-});
-
-// Case 5: Identify the ordinal number for 11
-// When the number is 11,
-// Then the function should return "11th"
-
-test("should return '11th' for 11", () => {
+// Numbers ending in 11, 12, 13: should append 'th'
+test("append 'th' to numbers ending in 11, 12, 13", () => {
   expect(getOrdinalNumber(11)).toEqual("11th");
-});
-
-// Case 6: Identify the ordinal number for 12
-// When the number is 12,
-// Then the function should return "12th"
-
-test("should return '12th' for 12", () => {
   expect(getOrdinalNumber(12)).toEqual("12th");
-});
-
-// Case 7: Identify the ordinal number for 13
-// When the number is 13,
-// Then the function should return "13th"
-
-test("should return '13th' for 13", () => {
   expect(getOrdinalNumber(13)).toEqual("13th");
-});
-
-// Case 8: Identify the ordinal number for 21
-// When the number is 21,
-// Then the function should return "21st"
-
-test("should return '21st' for 21", () => {
-  expect(getOrdinalNumber(21)).toEqual("21st");
-});
-
-// Case 9: Identify the ordinal number for 22
-// When the number is 22,
-// Then the function should return "22nd"
-
-test("should return '22nd' for 22", () => {
-  expect(getOrdinalNumber(22)).toEqual("22nd");
-});
-
-// Case 10: Identify the ordinal number for 23
-// When the number is 23,
-// Then the function should return "23rd"
-
-test("should return '23rd' for 23", () => {
-  expect(getOrdinalNumber(23)).toEqual("23rd");
-});
-
-// Case 11: Identify the ordinal number for 101
-// When the number is 101,
-// Then the function should return "101st"
-
-test("should return '101st' for 101", () => {
-  expect(getOrdinalNumber(101)).toEqual("101st");
-});
-
-// Case 12: Identify the ordinal number for 111
-// When the number is 111,
-// Then the function should return "111th"
-
-test("should return '111th' for 111", () => {
   expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
 });
 
-// Case 13: Identify the ordinal number for 0
-// When the number is 0,
-// Then the function should return "0th"
-
-test("should return '0th' for 0", () => {
+// All other numbers: should append 'th'
+test("append 'th' to all other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(14)).toEqual("14th");
   expect(getOrdinalNumber(0)).toEqual("0th");
 });