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const {LazyArray, Pointer, uint8, uint16, DecodeStream, EncodeStream} = require('../');
const should = require('chai').should();
const concat = require('concat-stream');
describe('LazyArray', function() {
describe('decode', function() {
it('should decode items lazily', function() {
const stream = new DecodeStream(Buffer.from([1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, 4);
const arr = array.decode(stream);
arr.should.not.be.an.instanceof(Array);
arr.should.have.length(4);
stream.pos.should.equal(4);
arr.get(0).should.equal(1);
arr.get(1).should.equal(2);
arr.get(2).should.equal(3);
arr.get(3).should.equal(4);
should.not.exist(arr.get(-1));
return should.not.exist(arr.get(5));
});
it('should be able to convert to an array', function() {
const stream = new DecodeStream(Buffer.from([1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, 4);
const arr = array.decode(stream);
return arr.toArray().should.deep.equal([1, 2, 3, 4]);
});
it('should have an inspect method', function() {
const stream = new DecodeStream(Buffer.from([1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, 4);
const arr = array.decode(stream);
return arr.inspect().should.equal('[ 1, 2, 3, 4 ]');
});
return it('should decode length as number before array', function() {
const stream = new DecodeStream(Buffer.from([4, 1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, uint8);
const arr = array.decode(stream);
return arr.toArray().should.deep.equal([1, 2, 3, 4]);
});
});
describe('size', () =>
it('should work with LazyArrays', function() {
const stream = new DecodeStream(Buffer.from([1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, 4);
const arr = array.decode(stream);
return array.size(arr).should.equal(4);
})
);
return describe('encode', () =>
it('should work with LazyArrays', function(done) {
const stream = new DecodeStream(Buffer.from([1, 2, 3, 4, 5]));
const array = new LazyArray(uint8, 4);
const arr = array.decode(stream);
const enc = new EncodeStream;
enc.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from([1, 2, 3, 4]));
return done();
})
);
array.encode(enc, arr);
return enc.end();
})
);
});