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Pattern_09.test.js
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const printDiamond = require('../Pattern_09/Pattern_09');
describe('printDiamond', () => {
it('should print the diamond pattern for n=5', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
printDiamond(5);
expect(consoleSpy).toHaveBeenCalledTimes(10);
expect(consoleSpy.mock.calls).toEqual([
[' * '],
[' *** '],
[' ***** '],
[' ******* '],
['*********'],
['*********'],
[' ******* '],
[' ***** '],
[' *** '],
[' * '],
]);
consoleSpy.mockRestore();
});
it('should print the diamond pattern for n=10', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
printDiamond(10);
expect(consoleSpy).toHaveBeenCalledTimes(20);
expect(consoleSpy.mock.calls).toEqual([
[' * '],
[' *** '],
[' ***** '],
[' ******* '],
[' ********* '],
[' *********** '],
[' ************* '],
[' *************** '],
[' ***************** '],
['*******************'],
['*******************'],
[' ***************** '],
[' *************** '],
[' ************* '],
[' *********** '],
[' ********* '],
[' ******* '],
[' ***** '],
[' *** '],
[' * '],
]);
consoleSpy.mockRestore();
});
it('should print the diamond pattern for n=15', () => {
const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
printDiamond(15);
expect(consoleSpy).toHaveBeenCalledTimes(30);
expect(consoleSpy.mock.calls).toEqual([
[' * '],
[' *** '],
[' ***** '],
[' ******* '],
[' ********* '],
[' *********** '],
[' ************* '],
[' *************** '],
[' ***************** '],
[' ******************* '],
[' ********************* '],
[' *********************** '],
[' ************************* '],
[' *************************** '],
['*****************************'],
['*****************************'],
[' *************************** '],
[' ************************* '],
[' *********************** '],
[' ********************* '],
[' ******************* '],
[' ***************** '],
[' *************** '],
[' ************* '],
[' *********** '],
[' ********* '],
[' ******* '],
[' ***** '],
[' *** '],
[' * '],
]);
consoleSpy.mockRestore();
});
});