modbus-serial
Version:
A pure JavaScript implemetation of MODBUS-RTU (Serial and TCP) for NodeJS.
108 lines (87 loc) • 3.83 kB
JavaScript
/* eslint-disable no-undef */
const expect = require("chai").expect;
const BlePort = require("./../../ports/bleport");
const { DeviceMock, WebBluetoothMock } = require("web-bluetooth-mock");
const TX_SERVICE_UUID = "0000ffd0-0000-1000-8000-00805f9b34fb";
const TX_CHARACTERISTIC_UUID = "0000ffd1-0000-1000-8000-00805f9b34fb";
const RX_SERVICE_UUID = "0000fff0-0000-1000-8000-00805f9b34fb";
const RX_CHARACTERISTIC_UUID = "0000fff1-0000-1000-8000-00805f9b34fb";
describe("Bluetooth LE port", function() {
function prepare() {
const deviceMock = new DeviceMock("Test Device", [TX_SERVICE_UUID, RX_SERVICE_UUID]);
const txServiceMock = deviceMock.getServiceMock(TX_SERVICE_UUID);
const txCharacteristicMock = txServiceMock.getCharacteristicMock(TX_CHARACTERISTIC_UUID);
const rxServiceMock = deviceMock.getServiceMock(RX_SERVICE_UUID);
const rxCharacteristicMock = txServiceMock.getCharacteristicMock(RX_CHARACTERISTIC_UUID);
const bluetooth = new WebBluetoothMock([deviceMock]);
const port = new BlePort({
bluetooth,
txService: TX_SERVICE_UUID,
txCharacteristic: TX_CHARACTERISTIC_UUID,
rxService: RX_SERVICE_UUID,
rxCharacteristic: RX_CHARACTERISTIC_UUID
});
return { bluetooth, deviceMock, port, rxCharacteristicMock, rxServiceMock, txCharacteristicMock, txServiceMock };
}
describe("#isOpen", function() {
it("should not be open before #open", function() {
const { port } = prepare();
expect(port.isOpen).to.be.false;
});
it("should be open after #open", function(done) {
const { port } = prepare();
port.open(function(error) {
expect(error).to.be.undefined;
expect(port.isOpen).to.be.true;
done();
});
});
it("should not be open after #close", function(done) {
const { port } = prepare();
port.open(function(error) {
expect(error).to.be.undefined;
port.close(function(error) {
expect(error).to.be.undefined;
expect(port.isOpen).to.be.false;
done();
});
});
});
});
describe("data handler", function() {
it("should return a valid Modbus RTU message", function(done) {
const { port } = prepare();
port.once("data", function(data) {
expect(data.toString("hex")).to.equal("110306ae415652434049ad");
done();
});
port.open(function(error) {
expect(error).to.be.undefined;
port.write(Buffer.from("1103006B00037687", "hex"));
setTimeout(function() {
const buffer = Buffer.from("110306ae415652434049ad", "hex");
port._handleCharacteristicValueChanged(bufferToEvent(buffer));
});
});
});
});
describe("#write", function() {
it("should write a valid RTU message to the port", function(done) {
const { port, txCharacteristicMock } = prepare();
txCharacteristicMock.writeValue = (buffer) => {
expect(Buffer.from(buffer).toString("hex")).to.equal("1103006b00037687");
done();
};
port.open(function(error) {
expect(error).to.be.undefined;
port.write(Buffer.from("1103006B00037687", "hex"));
});
});
});
});
function bufferToEvent(buffer) {
const arrayBuffer = BlePort._bufferToArrayBuffer(buffer);
const dataView = new DataView(arrayBuffer);
return { target: { value: dataView } };
}
;