thanhnguyennguyen / cff

const {

    steps,

    steps2,

    steps3,

    steps4

} = require('./index.js');

// put your tests here

test('test steps: test some invalid inputs ', () => {

    expect(steps(-1)).toEqual([]);

    expect(steps(0)).toEqual([]);

});

test('test steps: some valid inputs ', () => {

    expect(steps(1)).toEqual(['#']);

    expect(steps(2)).toEqual(['# ', '##']);

    expect(steps(3)).toEqual(['#  ', '## ', '###']);

    expect(steps(4)).toEqual(['#   ', '##  ', '### ', '####']);

});

test('test steps2 (recursion): test some invalid inputs ', () => {

    expect(steps2(-1)).toEqual([]);

    expect(steps2(0)).toEqual([]);

});

test('test steps2 (recursion): some valid inputs ', () => {

    expect(steps2(1)).toEqual(['#']);

    expect(steps2(2)).toEqual(['# ', '##']);

    expect(steps2(3)).toEqual(['#  ', '## ', '###']);

    expect(steps2(4)).toEqual(['#   ', '##  ', '### ', '####']);

});

test('test steps3 (matrix): test some invalid inputs ', () => {

    expect(steps3(-1)).toEqual([]);

    expect(steps3(0)).toEqual([]);

});

test('test steps3 (matrix): some valid inputs ', () => {

    expect(steps3(1)).toEqual(['#']);

    expect(steps3(2)).toEqual(['# ', '##']);

    expect(steps3(3)).toEqual(['#  ', '## ', '###']);

    expect(steps3(4)).toEqual(['#   ', '##  ', '### ', '####']);

});

test('test steps4: test some invalid inputs ', () => {

    expect(steps4(-1)).toEqual([]);

    expect(steps4(0)).toEqual([]);

});

test('test steps4: some valid inputs ', () => {

    expect(steps4(1)).toEqual(['#']);

    expect(steps4(2)).toEqual(['# ', '##']);

    expect(steps4(3)).toEqual(['#  ', '## ', '###']);

    expect(steps4(4)).toEqual(['#   ', '##  ', '### ', '####']);

});