| 1 | import { describe, test, it } from 'node:test'; | |
| 2 | import { recite } from './main.js'; | |
| 3 | import assert from 'node:assert'; | |
| 4 | ||
| 5 | describe('Beer Song', () => { | |
| 6 | // Test case: verify the function correctly handles the first verse (99 bottles) | |
| 7 | test('first generic verse', () => { | |
| 8 | const expected = [ | |
| 9 | '99 bottles of beer on the wall, 99 bottles of beer.', | |
| 10 | 'Take one down and pass it around, 98 bottles of beer on the wall.' | |
| 11 | ]; | |
| 12 | assert.deepStrictEqual(recite(99), expected); | |
| 13 | }); | |
| 14 | ||
| 15 | // Test case: verify the function correctly handles the last standard verse (3 bottles) | |
| 16 | test('last generic verse', () => { | |
| 17 | const expected = [ | |
| 18 | '3 bottles of beer on the wall, 3 bottles of beer.', | |
| 19 | 'Take one down and pass it around, 2 bottles of beer on the wall.' | |
| 20 | ]; | |
| 21 | assert.deepStrictEqual(recite(3), expected); | |
| 22 | }); | |
| 23 | ||
| 24 | // Test case: verify the function correctly handles the verse with 2 bottles | |
| 25 | test('verse with 2 bottles', () => { | |
| 26 | const expected = [ | |
| 27 | '2 bottles of beer on the wall, 2 bottles of beer.', | |
| 28 | 'Take one down and pass it around, 1 bottle of beer on the wall.' | |
| 29 | ]; | |
| 30 | assert.deepStrictEqual(recite(2), expected); | |
| 31 | }); | |
| 32 | ||
| 33 | // Test case: verify the function correctly handles the verse with 1 bottle | |
| 34 | test('verse with 1 bottle', () => { | |
| 35 | const expected = [ | |
| 36 | '1 bottle of beer on the wall, 1 bottle of beer.', | |
| 37 | 'Take it down and pass it around, no more bottles of beer on the wall.' | |
| 38 | ]; | |
| 39 | assert.deepStrictEqual(recite(1), expected); | |
| 40 | }); | |
| 41 | ||
| 42 | // Edge case: tests the special verse when there are no more bottles | |
| 43 | test('verse with 0 bottles', () => { | |
| 44 | const expected = [ | |
| 45 | 'No more bottles of beer on the wall, no more bottles of beer.', | |
| 46 | 'Go to the store and buy some more, 99 bottles of beer on the wall.' | |
| 47 | ]; | |
| 48 | assert.deepStrictEqual(recite(0), expected); | |
| 49 | }); | |
| 50 | ||
| 51 | // Test case: verify the function correctly handles multiple verses | |
| 52 | test('first two verses', () => { | |
| 53 | const expected = [ | |
| 54 | '99 bottles of beer on the wall, 99 bottles of beer.', | |
| 55 | 'Take one down and pass it around, 98 bottles of beer on the wall.', | |
| 56 | '', | |
| 57 | '98 bottles of beer on the wall, 98 bottles of beer.', | |
| 58 | 'Take one down and pass it around, 97 bottles of beer on the wall.' | |
| 59 | ]; | |
| 60 | assert.deepStrictEqual(recite(99, 2), expected); | |
| 61 | }); | |
| 62 | ||
| 63 | // Test case: verify the function correctly handles the last three verses | |
| 64 | test('last three verses', () => { | |
| 65 | const expected = [ | |
| 66 | '2 bottles of beer on the wall, 2 bottles of beer.', | |
| 67 | 'Take one down and pass it around, 1 bottle of beer on the wall.', | |
| 68 | '', | |
| 69 | '1 bottle of beer on the wall, 1 bottle of beer.', | |
| 70 | 'Take it down and pass it around, no more bottles of beer on the wall.', | |
| 71 | '', | |
| 72 | 'No more bottles of beer on the wall, no more bottles of beer.', | |
| 73 | 'Go to the store and buy some more, 99 bottles of beer on the wall.' | |
| 74 | ]; | |
| 75 | assert.deepStrictEqual(recite(2, 3), expected); | |
| 76 | }); | |
| 77 | ||
| 78 | // Edge case: tests reciting a single verse from the middle of the song | |
| 79 | test('single verse from the middle', () => { | |
| 80 | const expected = [ | |
| 81 | '50 bottles of beer on the wall, 50 bottles of beer.', | |
| 82 | 'Take one down and pass it around, 49 bottles of beer on the wall.' | |
| 83 | ]; | |
| 84 | assert.deepStrictEqual(recite(50), expected); | |
| 85 | }); | |
| 86 | ||
| 87 | // This test verifies the function correctly handles multiple edge cases in sequence | |
| 88 | test('multiple verses across special boundaries', () => { | |
| 89 | const expected = [ | |
| 90 | '3 bottles of beer on the wall, 3 bottles of beer.', | |
| 91 | 'Take one down and pass it around, 2 bottles of beer on the wall.', | |
| 92 | '', | |
| 93 | '2 bottles of beer on the wall, 2 bottles of beer.', | |
| 94 | 'Take one down and pass it around, 1 bottle of beer on the wall.', | |
| 95 | '', | |
| 96 | '1 bottle of beer on the wall, 1 bottle of beer.', | |
| 97 | 'Take it down and pass it around, no more bottles of beer on the wall.' | |
| 98 | ]; | |
| 99 | assert.deepStrictEqual(recite(3, 3), expected); | |
| 100 | }); | |
| 101 | }); |
| Test Name | Status |
|---|---|
first generic verse | Pass |
last generic verse | Pass |
verse with 2 bottles | Pass |
verse with 1 bottle | Pass |
verse with 0 bottles | Pass |
first two verses | Pass |
last three verses | Pass |
all verses | Pass |
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