How to use driver.startAndroidSession method in Appium Android Driver

...287    afterEach(() => {288      sandbox.restore();289    });290    it('should set actual platform version', async () => {291      await driver.startAndroidSession();292      driver.adb.getPlatformVersion.calledOnce.should.be.true;293    });294    it('should auto launch app if it is on the device', async () => {295      driver.opts.autoLaunch = true;296      await driver.startAndroidSession();297      driver.initAUT.calledOnce.should.be.true;298    });299    it('should handle chrome sessions', async () => {300      driver.opts.browserName = 'Chrome';301      await driver.startAndroidSession();302      driver.startChromeSession.calledOnce.should.be.true;303    });304    it('should unlock the device', async () => {305      await driver.startAndroidSession();306      helpers.unlock.calledOnce.should.be.true;307    });308    it('should start AUT if auto lauching', async () => {309      driver.opts.autoLaunch = true;310      await driver.startAndroidSession();311      driver.initAUT.calledOnce.should.be.true;312    });313    it('should not start AUT if not auto lauching', async () => {314      driver.opts.autoLaunch = false;315      await driver.startAndroidSession();316      driver.initAUT.calledOnce.should.be.false;317    });318    it('should set the context if autoWebview is requested', async () => {319      driver.opts.autoWebview = true;320      await driver.startAndroidSession();321      driver.defaultWebviewName.calledOnce.should.be.true;322      driver.setContext.calledOnce.should.be.true;323    });324    it('should set the context if autoWebview is requested using timeout', async () => {325      driver.setContext.onCall(0).throws(errors.NoSuchContextError);326      driver.setContext.onCall(1).returns();327      driver.opts.autoWebview = true;328      driver.opts.autoWebviewTimeout = 5000;329      await driver.startAndroidSession();330      driver.defaultWebviewName.calledOnce.should.be.true;331      driver.setContext.calledTwice.should.be.true;332    });333    it('should respect timeout if autoWebview is requested', async function () {334      this.timeout(10000);335      driver.setContext.throws(new errors.NoSuchContextError());336      let begin = Date.now();337      driver.opts.autoWebview = true;338      driver.opts.autoWebviewTimeout = 5000;339      await driver.startAndroidSession().should.eventually.be.rejected;340      driver.defaultWebviewName.calledOnce.should.be.true;341      // we have a timeout of 5000ms, retrying on 500ms, so expect 10 times342      driver.setContext.callCount.should.equal(10);343      let end = Date.now();344      (end - begin).should.be.above(5000);345    });346    it('should not set the context if autoWebview is not requested', async () => {347      await driver.startAndroidSession();348      driver.defaultWebviewName.calledOnce.should.be.false;349      driver.setContext.calledOnce.should.be.false;350    });351    it('should set ignoreUnimportantViews cap', async () => {352      driver.opts.ignoreUnimportantViews = true;353      await driver.startAndroidSession();354      driver.settings.update.calledOnce.should.be.true;355      driver.settings.update.firstCall.args[0].ignoreUnimportantViews.should.be.true;356    });357    it('should not call dismissChromeWelcome on missing chromeOptions', async () => {358      driver.opts.browserName = 'Chrome';359      await driver.startAndroidSession();360      driver.dismissChromeWelcome.calledOnce.should.be.false;361    });362    it('should call dismissChromeWelcome', async () => {363      driver.opts.browserName = 'Chrome';364      driver.opts.chromeOptions = {365        "args" : ["--no-first-run"]366      };367      await driver.startAndroidSession();368      driver.dismissChromeWelcome.calledOnce.should.be.true;369    });370  });371  describe('validateDesiredCaps', () => {372    before(() => {373      driver = new AndroidDriver();374    });375    it('should throw an error if caps do not contain an app, package or valid browser', () => {376      expect(() => {377        driver.validateDesiredCaps({platformName: 'Android', deviceName: 'device'});378      }).to.throw(/must include/);379      expect(() => {380        driver.validateDesiredCaps({platformName: 'Android', deviceName: 'device', browserName: 'Netscape Navigator'});381      }).to.throw(/must include/);...