93 lines
3.0 KiB
TypeScript
93 lines
3.0 KiB
TypeScript
// Copyright 2021 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, jasmine */
|
|
import 'jasmine';
|
|
|
|
import {Buffer} from 'buffer';
|
|
|
|
import {Encoder} from './encoder';
|
|
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('Encoder', () => {
|
|
let encoder: Encoder;
|
|
let textEncoder: TextEncoder;
|
|
|
|
beforeEach(() => {
|
|
encoder = new Encoder();
|
|
textEncoder = new TextEncoder();
|
|
});
|
|
|
|
it('creates frame for empty data', () => {
|
|
const data = textEncoder.encode('');
|
|
expect(encoder.uiFrame(0, data)).toEqual(
|
|
withFlags(withFCS(new Uint8Array([0x01, 0x03])))
|
|
);
|
|
expect(encoder.uiFrame(0x1a, data)).toEqual(
|
|
withFlags(withFCS(new Uint8Array([0x35, 0x03])))
|
|
);
|
|
expect(encoder.uiFrame(0x1a, data)).toEqual(
|
|
withFlags(withFCS(textEncoder.encode('\x35\x03')))
|
|
);
|
|
});
|
|
|
|
it('creates frame for one byte', () => {
|
|
const data = textEncoder.encode('A');
|
|
expect(encoder.uiFrame(0, data)).toEqual(
|
|
withFlags(withFCS(textEncoder.encode('\x01\x03A')))
|
|
);
|
|
});
|
|
|
|
it('creates frame for multibyte data', () => {
|
|
const data = textEncoder.encode('123456789');
|
|
expect(encoder.uiFrame(0, data)).toEqual(
|
|
withFlags(withFCS(textEncoder.encode('\x01\x03123456789')))
|
|
);
|
|
});
|
|
|
|
it('creates frame for multibyte data with address', () => {
|
|
const data = textEncoder.encode('123456789');
|
|
expect(encoder.uiFrame(128, data)).toEqual(
|
|
withFlags(withFCS(textEncoder.encode('\x00\x03\x03123456789')))
|
|
);
|
|
});
|
|
|
|
it('creates frame for data with escape sequence', () => {
|
|
const data = textEncoder.encode('\x7d');
|
|
const expectedContent = util.concatenate(
|
|
textEncoder.encode('\x7d\x5d\x03\x7d\x5d'),
|
|
protocol.frameCheckSequence(textEncoder.encode('\x7d\x03\x7d'))
|
|
);
|
|
expect(encoder.uiFrame(0x3e, data)).toEqual(withFlags(expectedContent));
|
|
|
|
const data2 = textEncoder.encode('A\x7e\x7dBC');
|
|
const expectedContent2 = util.concatenate(
|
|
textEncoder.encode('\x7d\x5d\x03A\x7d\x5e\x7d\x5dBC'),
|
|
protocol.frameCheckSequence(textEncoder.encode('\x7d\x03A\x7e\x7dBC'))
|
|
);
|
|
expect(encoder.uiFrame(0x3e, data2)).toEqual(withFlags(expectedContent2));
|
|
});
|
|
});
|