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const {String:StringT, uint8, DecodeStream, EncodeStream} = require('../');
const should = require('chai').should();
const concat = require('concat-stream');
describe('String', function() {
describe('decode', function() {
it('should decode fixed length', function() {
const stream = new DecodeStream(Buffer.from('testing'));
const string = new StringT(7);
return string.decode(stream).should.equal('testing');
});
it('should decode length from parent key', function() {
const stream = new DecodeStream(Buffer.from('testing'));
const string = new StringT('len');
return string.decode(stream, {len: 7}).should.equal('testing');
});
it('should decode length as number before string', function() {
const stream = new DecodeStream(Buffer.from('\x07testing'));
const string = new StringT(uint8);
return string.decode(stream).should.equal('testing');
});
it('should decode utf8', function() {
const stream = new DecodeStream(Buffer.from('🍻'));
const string = new StringT(4, 'utf8');
return string.decode(stream).should.equal('🍻');
});
it('should decode encoding computed from function', function() {
const stream = new DecodeStream(Buffer.from('🍻'));
const string = new StringT(4, function() { return 'utf8'; });
return string.decode(stream).should.equal('🍻');
});
it('should decode null-terminated string and read past terminator', function() {
const stream = new DecodeStream(Buffer.from('🍻\x00'));
const string = new StringT(null, 'utf8');
string.decode(stream).should.equal('🍻');
return stream.pos.should.equal(5);
});
return it('should decode remainder of buffer when null-byte missing', function() {
const stream = new DecodeStream(Buffer.from('🍻'));
const string = new StringT(null, 'utf8');
return string.decode(stream).should.equal('🍻');
});
});
describe('size', function() {
it('should use string length', function() {
const string = new StringT(7);
return string.size('testing').should.equal(7);
});
it('should use correct encoding', function() {
const string = new StringT(10, 'utf8');
return string.size('🍻').should.equal(4);
});
it('should use encoding from function', function() {
const string = new StringT(10, function() { return 'utf8'; });
return string.size('🍻').should.equal(4);
});
it('should add size of length field before string', function() {
const string = new StringT(uint8, 'utf8');
return string.size('🍻').should.equal(5);
});
it('should work with utf16be encoding', function() {
const string = new StringT(10, 'utf16be');
return string.size('🍻').should.equal(4);
});
it('should take null-byte into account', function() {
const string = new StringT(null, 'utf8');
return string.size('🍻').should.equal(5);
});
return it('should use defined length if no value given', function() {
const array = new StringT(10);
return array.size().should.equal(10);
});
});
return describe('encode', function() {
it('should encode using string length', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('testing'));
return done();
})
);
const string = new StringT(7);
string.encode(stream, 'testing');
return stream.end();
});
it('should encode length as number before string', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('\x07testing'));
return done();
})
);
const string = new StringT(uint8);
string.encode(stream, 'testing');
return stream.end();
});
it('should encode length as number before string utf8', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('\x0ctesting 😜', 'utf8'));
return done();
})
);
const string = new StringT(uint8, 'utf8');
string.encode(stream, 'testing 😜');
return stream.end();
});
it('should encode utf8', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('🍻'));
return done();
})
);
const string = new StringT(4, 'utf8');
string.encode(stream, '🍻');
return stream.end();
});
it('should encode encoding computed from function', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('🍻'));
return done();
})
);
const string = new StringT(4, function() { return 'utf8'; });
string.encode(stream, '🍻');
return stream.end();
});
return it('should encode null-terminated string', function(done) {
const stream = new EncodeStream;
stream.pipe(concat(function(buf) {
buf.should.deep.equal(Buffer.from('🍻\x00'));
return done();
})
);
const string = new StringT(null, 'utf8');
string.encode(stream, '🍻');
return stream.end();
});
});
});