Protractor调用外部自定义定位器报错，寻求解决方案

Let's walk through fixing the issues with your custom button locator. I spotted a few key problems in your code that are causing the error:

1. Syntax & Export Issues in Custom Locator File #

Your buttontextcusloc.js has unclosed curly braces and an incorrect export approach. Here's the corrected version:

// customlocators/buttontextcusloc.js
by.addLocator('buttonTextSimple', function(buttonText, opt_parentElement, opt_rootSelector) {
  // Use parent element if provided, else document
  var using = opt_parentElement || document;
  var buttons = using.querySelectorAll('button');

  // Trim text to handle accidental spaces/newlines in button content
  return Array.prototype.filter.call(buttons, function(button) {
    return button.textContent.trim() === buttonText.trim();
  });
});

// We don't need to export a constructor here — just running addLocator registers the locator globally
module.exports = {};

The main fixes here:

• Closed all missing curly braces in the addLocator callback
• Removed the unnecessary new buttontxtcustomlocator() export (since we're just registering a locator, not creating an instance)
• Added trim() to both the button text and input text to make matching more reliable (buttons often have hidden whitespace in their HTML)

2. Correct Path in Config.js #

When requiring your custom locator, make sure you use a relative path from your config file to the customlocators folder. If config.js is in your project root, update the require statement like this:

// config.js
// Add ./ to reference the current directory
require('./customlocators/buttontextcusloc.js');

exports.config = {
  directConnect: true,
  framework: 'jasmine',
  // Don't forget to include your spec file path
  specs: ['com/sam/scripts/customloctestcase.spec.js'],
  // Other config options...
};

Without ./, Node.js will look for customlocators in the global node_modules folder instead of your project directory.

3. Optional: Add Wait for Element Presence #

To avoid "element not found" errors due to page loading delays, add a wait using Protractor's ExpectedConditions:

// com/sam/scripts/customloctestcase.spec.js
var EC = protractor.ExpectedConditions;

describe('Custom Locator Script', function() {
  it("check custom locator", function() {
    browser.get("http://www.way2automation.com/angularjs-protractor/registeration/#/login");
    
    // Wait up to 5 seconds for the button to appear
    var goButton = element(by.buttonTextSimple('Go!'));
    browser.wait(EC.presenceOf(goButton), 5000);
    
    goButton.click();
  });
});

4. Verify Execution #

Run your Protractor command again (double-check your config filename matches what you're referencing):

protractor defaultconfig.js

内容的提问来源于stack exchange，提问作者Sameera De Silva