@@ -17,4 +17,42 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
1717 expect ( getOrdinalNumber ( 1 ) ) . toEqual ( "1st" ) ;
1818 expect ( getOrdinalNumber ( 21 ) ) . toEqual ( "21st" ) ;
1919 expect ( getOrdinalNumber ( 131 ) ) . toEqual ( "131st" ) ;
20+
21+ } ) ;
22+
23+ // Case 2: Numbers ending with 2 (but not 12)
24+ // When the number ends with 2, except those ending with 12,
25+ // Then the function should return a string by appending "nd" to the number.
26+ test ( "should append 'nd' for numbers ending with 2, except those ending with 12" , ( ) => {
27+ expect ( getOrdinalNumber ( 2 ) ) . toEqual ( "2nd" ) ;
28+ expect ( getOrdinalNumber ( 22 ) ) . toEqual ( "22nd" ) ;
29+ expect ( getOrdinalNumber ( 132 ) ) . toEqual ( "132nd" ) ;
30+ } ) ;
31+
32+ // Case 3: Numbers ending with 3 (but not 13)
33+ // When the case ends with 3, expect those ending with 13
34+ // Then the function should return a string by appending "rd" to the number.
35+ test ( "should append 'rd' for numbers ending with 3, except those ending with 13" , ( ) => {
36+ expect ( getOrdinalNumber ( 3 ) ) . toEqual ( "3rd" ) ;
37+ expect ( getOrdinalNumber ( 23 ) ) . toEqual ( "23rd" ) ;
38+ expect ( getOrdinalNumber ( 133 ) ) . toEqual ( "133rd" ) ;
39+ } ) ;
40+
41+ // Case 4: Numbers ending with 11, 12, or 13
42+ // When the number ends with 11, 12, or 13,
43+ // Then the function should return a string by appending "th" to the number.
44+ test ( "should append 'th' for numbers ending with 11, 12, or 13" , ( ) => {
45+ expect ( getOrdinalNumber ( 11 ) ) . toEqual ( "11th" ) ;
46+ expect ( getOrdinalNumber ( 12 ) ) . toEqual ( "12th" ) ;
47+ expect ( getOrdinalNumber ( 13 ) ) . toEqual ( "13th" ) ;
48+ } ) ;
49+
50+ // Case 5: ALL other numbers
51+ // When the number does not end with 1, 2, 3, 11, 12, or 13,
52+ // Then the function should return a string by appending "th" to the number.
53+ test ( "should append 'th' for all other numbers" , ( ) => {
54+ expect ( getOrdinalNumber ( 4 ) ) . toEqual ( "4th" ) ;
55+ expect ( getOrdinalNumber ( 10 ) ) . toEqual ( "10th" ) ;
56+ expect ( getOrdinalNumber ( 14 ) ) . toEqual ( "14th" ) ;
57+ expect ( getOrdinalNumber ( 100 ) ) . toEqual ( "100th" ) ;
2058} ) ;
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