Bagaimana untuk memilih pilihan di drop down protractorjs e2e tes

element(by.cssContainingText('option', 'BeaverBox Testing')).click();

var selectDropdownbyNum = function ( element, optionNum ) {
  if (optionNum){
    var options = element.all(by.tagName('option'))   
      .then(function(options){
        options[optionNum].click();
      });
  }
};

var SelectWrapper = function(selector) {
    this.webElement = element(selector);
};
SelectWrapper.prototype.getOptions = function() {
    return this.webElement.all(by.tagName('option'));
};
SelectWrapper.prototype.getSelectedOptions = function() {
    return this.webElement.all(by.css('option[selected="selected"]'));
};
SelectWrapper.prototype.selectByValue = function(value) {
    return this.webElement.all(by.css('option[value="' + value + '"]')).click();
};
SelectWrapper.prototype.selectByPartialText = function(text) {
    return this.webElement.all(by.cssContainingText('option', text)).click();   
};
SelectWrapper.prototype.selectByText = function(text) {
    return this.webElement.all(by.xpath('option[.="' + text + '"]')).click();   
};

module.exports = SelectWrapper;

var SelectWrapper  = require('select-wrapper');
var mySelect = new SelectWrapper(by.id('locregion'));

# select an option by value
mySelect.selectByValue('4');

# select by visible text
mySelect.selectByText('BoxLox');

element(by.model('parent_id')).sendKeys('BKN01');

ptor.findElement(protractor.By.css('select option:nth-child(1)')).click();

function switchType(typeName) {
     $('.dropdown').element(By.cssContainingText('option', typeName)).click();
};

element(by.model('formModel.client'))
    .all(by.tagName('option'))
    .get(120)
    .click();

$('select').click();
$('select option=["' + optionInputFromFunction + '"]').click();
// This looks useless but it slows down the click event
// long enough to register a change in Angular.
browser.actions().mouseDown().mouseUp().perform();

element.all(by.id('locregion')).then(function(selectItem) {
  expect(selectItem[0].getText()).toEqual('Ranjans Mobile Testing')
  selectItem[0].click(); //will click on first item
  selectItem[3].click(); //will click on fourth item
});

selectOption(option: ElementFinder |Locator | string, timeout?: number): Promise<void>

selectOptionByIndex(select: ElementFinder | Locator | string, index: number, timeout?: number): Promise<void>

selectOptionByText(select: ElementFinder | Locator | string, text: string, timeout?: number): Promise<void>

var select = element(by.model('organization.parent_id'));
select.$('[value="1"]').click();

element.all(by.css('md-select')).each(function (eachElement, index) {
    eachElement.click();                    // select the <select>
    browser.waitForAngular();              // wait for the renderings to take effect
    element(by.css('md-option')).click();   // select the first md-option
    browser.waitForAngular();              // wait for the renderings to take effect
});

function selectOption(modelSelector, index) {
    for (var i=0; i<index; i++){
        element(by.model(modelSelector)).sendKeys("\uE015");
    }
}

selectMyOption: function (optionNum) {
       selectOption('myOption', optionNum)
}

myPage.selectMyOption(1);

<select
    ng-model="foo" 
    ng-options="bar as bar.title for bar in bars track by bar.id">
</select>

element(by.css('[value="' + neededBarId+ '"]')).click();

selectDropDownByText:function(optionValue) {
            element(by.cssContainingText('option', optionValue)).click(); //optionValue: dropDownOption
        }

            <select ng-model="operator">
            <option value="name">Addition</option>
            <option value="age">Division</option>
            </select>

        var operators=element(by.model('operator'));
            operators.$('[value=Addition]').click();

var selectDropdownElement= element(by.id('select-dropdown'));
selectDropdownElement.all(by.tagName('option'))
      .then(function (options) {
          options[0].click();
      });

  onPrepare: function() {
    browser._selectDropdownbyNum = function (element, optionNum) {
      /* A helper function to select in a dropdown control an option
      * with specified number.
      */
      return element.all(by.tagName('option')).then(
        function(options) {
          options[optionNum].click();
        });
    };
  },

var setOption = function(optionToSelect) {

    var select = element(by.id('locregion'));
    select.click();
    select.all(by.tagName('option')).filter(function(elem, index) {
        return elem.getText().then(function(text) {
            return text === optionToSelect;
        });
    }).then(function(filteredElements){
        filteredElements[0].click();
    });
};

// using the function
setOption('BeaverBox Testing');