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// Copyright 2022 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
/* eslint-env browser */
import {Decoder} from './decoder';
import * as protocol from './protocol';
import * as util from './util';
const FLAG = Uint8Array.from([protocol.FLAG]);
function withFCS(data: Uint8Array): Uint8Array {
return util.concatenate(data, protocol.frameCheckSequence(data));
}
function withFlags(data: Uint8Array): Uint8Array {
return util.concatenate(FLAG, data, FLAG);
}
describe('Decoder', () => {
let decoder: Decoder;
let textEncoder: TextEncoder;
beforeEach(() => {
decoder = new Decoder();
textEncoder = new TextEncoder();
});
it('parses a correct UI frame peoperly', () => {
const expectedData = textEncoder.encode('123456789');
const expectedAddress = 128;
const frameData = withFlags(
withFCS(textEncoder.encode('\x00\x03\x03123456789'))
);
const frames = Array.from(decoder.process(frameData));
expect(frames.length).toEqual(1);
expect(frames[0].address).toEqual(expectedAddress);
expect(frames[0].data).toEqual(expectedData);
expect(frames[0].ok()).toBe(true);
});
});