testy

const assert = require('chai').assert;
const generator = require('../guest-src/generator');

describe('Generator', function(){
    beforeEach(function() {
        testGrid = [
            [6,4,1,9,8,2,3,5,7],
            [8,7,2,3,6,5,4,9,1],
            [3,5,9,4,1,7,2,8,6],
            [2,3,7,8,9,1,6,4,5],
            [1,8,6,5,2,4,7,3,9],
            [5,9,4,7,3,6,8,1,2],
            [4,1,8,2,7,9,5,6,3],
            [7,6,5,1,4,3,9,2,8],
            [9,2,3,6,5,8,1,7,4]
        ];

        testGridToSolve = [
            [6,4,1,9,8,2,3,5,7],
            [8,7,2,3,6,5,4,9,1],
            [3,5,9,4,1,7,2,8,6],
            [2,3,7,8,9,1,6,4,5],
            [1,8,6,5,2,4,7,3,9],
            [5,9,4,7,3,6,8,1,2],
            [4,1,8,2,7,9,5,6,3],
            [7,6,5,1,4,3,9,2,8],
            [9,2,3,6,5,8,0,0,0]
        ];
      });

    describe('check', function(){
        it('check function should return true for solved grid', function() {
            assert.equal(generator.check(testGrid), true);
        });

        it('check function return false for unsolved grid', function() {
            assert.equal(generator.check(testGridToSolve), false);
        });

    });

    describe('fill', function(){

        it('fill function should solve the test grid with 3 empty squares', function() {
            assert.deepEqual(generator.fill(testGridToSolve), testGrid);
        });

        it('fill function should not leave any empty square (represented by 0)', function() {
            assert.notDeepInclude(generator.fill(testGridToSolve), 0);
        });
    });

    describe('shuffle', function(){

        it('shuffle has the same length as the initial list and keeps its every element', function() {
            list = [1,2,3,4,5,6,7,8];
            shuffled = generator.shuffle(list);

            list.forEach(elem => assert.include(shuffled, elem));
            assert.equal(list.length, shuffled.length);
        });
    });
});