test/corrode-pointer.test.js

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

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

    it('retrieves from array', function(done){
        this.base
            .loop('array', function(end, discard, i){
                if(i >= 3){
                    return end();
                }
                this
                    .uint8('values')
                    .map.push();
            })
            .pointer('alphabet', ['a', 'b', 'c'], 'uint8')
            .pointer('numeric', 'array', 'uint8');

        this.eqArray([3, 5, 7, 1, 2], done, {
            array: [3, 5, 7],
            alphabet: 'b',
            numeric: 7
        });
    });

    it('retrieves from object', function(done){
        this.base
            .tap('obj', function(){
                this.loop(function(end, discard, i){
                    if(i >= 3){
                        return end();
                    }
                    this.uint8(i);
                });
            })
            .pointer('alphabet', { 0: 'a', 1: 'b', 2: 'c' }, 'uint8')
            .pointer('numeric', 'obj', 'uint8');

        this.eqArray([3, 5, 7, 1, 2], done, {
            obj: { 0: 3, 1: 5, 2: 7},
            alphabet: 'b',
            numeric: 7
        });
    });

    // why not?
    it('retrieves from string', function(done){
        this.base
            .terminatedString('string')
            .pointer('numeric', 'string', 'uint8');

        this.eqArray([0x68, 0x65, 0x6c, 0x6c, 0x6f, 0, 4], done, {
            string: 'hello',
            numeric: 'o'
        });
    });
});