Testing tab navigation order

In one of our tests, we need to make sure that the tab keyboard navigation inside a form is performed in the correct order.

Question: What is the conventional way to check the tab navigation order with protractor?

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Currently we are solving it by repeating the following step for as many input fields existing in a form (code below):

• check the ID of the currently focused element


• send TAB to the currently focused element

Here is the example spec:

it("should navigate with tab correctly", function () {
    var regCodePage = new RegCodePage();
    browser.wait(protractor.ExpectedConditions.visibilityOf(regCodePage.title), 10000);

    // registration code field has focus by default
    expect(regCodePage.registrationCode.getId()).toEqual(browser.driver.switchTo().activeElement().getId());

    // focus moved to Remember Registration Code
    regCodePage.registrationCode.sendKeys(protractor.Key.TAB);
    expect(regCodePage.rememberRegistrationCode.getId()).toEqual(browser.driver.switchTo().activeElement().getId());

    // focus moved to Request Code
    regCodePage.rememberRegistrationCode.sendKeys(protractor.Key.TAB);
    expect(regCodePage.requestCode.getId()).toEqual(browser.driver.switchTo().activeElement().getId());

    // focus moved to Cancel
    regCodePage.requestCode.sendKeys(protractor.Key.TAB);
    expect(regCodePage.cancelButton.getId()).toEqual(browser.driver.switchTo().activeElement().getId());

    // focus moved back to the input
    regCodePage.cancelButton.sendKeys(protractor.Key.TAB);
    expect(regCodePage.registrationCode.getId()).toEqual(browser.driver.switchTo().activeElement().getId());
});

where regCodePage is a Page Object:

var RegCodePage = function () {
    this.title = element(by.css("div.modal-header b.login-modal-title"));
    this.registrationCode = element(by.id("regCode"));

    this.rememberRegistrationCode = element(by.id("rememberRegCode"));
    this.requestCode = element(by.id("forgotCode"));

    this.errorMessage = element(by.css("div.auth-reg-code-block div#message"));

    this.sendRegCode = element(by.id("sendRegCode"));
    this.cancelButton = element(by.id("cancelButton"));
    this.closeButton = element(by.css("div.modal-header button.close"));
};

module.exports = RegCodePage;

It is working, but it is not really explicit and readable which makes it difficult to maintain. Also, another "smell" in the current approach is a code duplication.

If the current approach is how you would also do it, I would appreciate any insights about making it reusable.