si7021-sensor/test/si7021-test.js

A Node.js I2C module for the Silicon Labs Si7021 Temperature and Humidity and Sensor

process.env.NODE_ENV = 'test';

const chai   = require('chai');
const Si7021 = require('../Si7021.js');
const expect = chai.expect;

describe('si7021-sensor', () => {
  it('it should communicate with the device', (done) => {
    const si7021 = new Si7021();
    expect(si7021).to.be.an.instanceof(Si7021);
    si7021.reset()
      .then((result) => {
        expect(result).to.not.be.equal(0);
        done();
      })
      .catch((err) => {
        done(err);
      });
  });

  it('it should receive valid sensor data', (done) => {
    const si7021 = new Si7021();
    expect(si7021).to.be.an.instanceof(Si7021);
    si7021.reset()
      .then((result) => {
        expect(result).to.not.be.equal(0);
        return si7021.readSensorData();
      })
      .then((data) => {
        console.log(`Si7021 sensor data: ${JSON.stringify(data)}`);
        expect(data).to.have.all.keys('temperature_C', 'humidity');
        expect(data.temperature_C).to.be.within(-40, 85);
        expect(data.humidity).to.be.within(0, 100);
        done();
      })
      .catch((err) => {
        done(err);
      });
  });
});