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Pattern_18.test.js
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const reverseAlphabticalTriangle = require('../Pattern_18/Pattern_18');
describe('Reverse Alphabetical Triangle Pattern', () => {
it('should print the reverse alphabetical pattern for n = 5', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
reverseAlphabticalTriangle(5);
expect(consoleSpy.mock.calls).toEqual([
['E '],
['D E '],
['C D E '],
['B C D E '],
['A B C D E '],
]);
consoleSpy.mockRestore();
});
it('should print the reverse alphabetical pattern for n = 10', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
reverseAlphabticalTriangle(10);
expect(consoleSpy.mock.calls).toEqual([
['J '],
['I J '],
['H I J '],
['G H I J '],
['F G H I J '],
['E F G H I J '],
['D E F G H I J '],
['C D E F G H I J '],
['B C D E F G H I J '],
['A B C D E F G H I J '],
]);
consoleSpy.mockRestore();
});
it('should print the reverse alphabetical pattern for n = 15', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
reverseAlphabticalTriangle(15);
expect(consoleSpy.mock.calls).toEqual([
['O '],
['N O '],
['M N O '],
['L M N O '],
['K L M N O '],
['J K L M N O '],
['I J K L M N O '],
['H I J K L M N O '],
['G H I J K L M N O '],
['F G H I J K L M N O '],
['E F G H I J K L M N O '],
['D E F G H I J K L M N O '],
['C D E F G H I J K L M N O '],
['B C D E F G H I J K L M N O '],
['A B C D E F G H I J K L M N O '],
]);
consoleSpy.mockRestore();
});
});