test/base-stack.test.js

const { expect } = require('chai');
const Base = require('../src/base');

/** @test {CorrodeBase#varStack} */
describe('CorrodeBase#varStack', () => {
    beforeEach(function(){
        this.base = new Base();
        this.eqArray = require('./helpers/asserts').eqArray.bind(this);
    });

    /** @test {CorrodeBase#push} */
    it('pushes and pops', function(done){
        this.base
            .uint8('val_0')
            .push('child')
            .uint8('val_1')
            .push('child')
            .uint8('val_2')
            .pop()
            .uint8('val_3')
            .pop()
            .uint8('val_4');

        this.eqArray([0, 1, 2, 3, 4, 5], done, {
            val_0: 0,
            val_4: 4,
            child: {
                val_1: 1,
                val_3: 3,
                child: {
                    val_2: 2,
                }
            }
        })
    });

    /** @test {CorrodeBase#pop} */
    it('denies popping the root-layer', function(){
        this.base.pop();
        expect(this.eqArray.bind(this, [], () => {}, {})).to.throw(ReferenceError);
    });

    /**
     * @test {CorrodeBase#push}
     * @test {CorrodeBase#pop}
     */
    it('pushes back into old layers', function(done){
        this.base
            .uint8('val_0')
            .push('child')
            .uint8('val_1')
            .pop()
            .uint8('val_2')
            .push('child')
            .uint8('val_3')
            .pop()
            .uint8('val_4');

        this.eqArray([0, 1, 2, 3, 4], done, {
            val_0: 0,
            val_2: 2,
            val_4: 4,
            child: {
                val_1: 1,
                val_3: 3
            }
        });
    });

    /**
     * @test {CorrodeBase#push}
     * @test {CorrodeBase#finishRemainingJobs}
     */
    it('automatically unpushes as it unwinds', function(done){
        this.base
            .uint8('var_0')
            .push('child')
            .uint8('var_1');

        this.eqArray([0, 1, 2], done, {
            var_0: 0,
            child: {
                var_1: 1
            }
        });
    });

    /**
     * @test {CorrodeBase#options.strictObjectMode}
     */
    it('denies pushing into non-object vars', function(){
        this.base
            .uint8('var_0')
            .push('var_0')
            .uint8('var_1');

        expect(this.eqArray.bind(this, [0, 1, 2], () => {}, {})).to.throw(TypeError);
    });
});