javascript - selenium-webdriver 将函数数组作为参数传递给 executeScript

Question

import webdriver from 'selenium-webdriver';

const driver = new webdriver.Builder()
              .withCapabilities(webdriver.Capabilities.chrome())
              .build();

driver.get('https://www.google.com');
let foo = function(rules) {
  rules.forEach(rule => {
    rule();
  });
}
let bar = function() { return 'bar' };
let baz = function() { return 'baz' };
driver.executeScript(foo, [bar, baz]).then(function(result) {
  console.log(result);
});

driver.quit();

它出错了

WebDriverError: unknown error: rule is not a function


let foo = function(rules) {
  return rules;
  // rules.forEach(rule => {
  //   rule();
  // });
}
let bar = function() { return 'bar' };
let baz = function() { return 'baz' };
driver.executeScript(foo, [bar, baz]).then(function(result) {
  console.log(result); // refer the log pasted below
});

看起来函数正在序列化为 string

[ 'function bar() {\n  return \'bar\';\n}',
  'function baz() {\n  return \'baz\';\n}' ]

任何关于如何将函数数组作为参数传递的指针都会有所帮助。

Answer 1

我找到了一个不同的解决方法，不使用 eval 明确地，但以类似的方式。

1. 要注入(inject)的函数必须是namedfunction

2. 注入(inject) function.toString()作为 <script> 的内容

   function foo(rules) {
     var result = [];
     rules.forEach(rule => {
       result.push(rule());
     });
     return result;
   }
   function bar() { return 'bar' };
   function baz() { return 'baz' };
   
   function inject(content) {
     var script = document.createElement('script');
     script.innerHTML = content;
     document.head.appendChild(script);
   }
   let script = `${bar.toString()} ${baz.toString()} ${foo.toString()}`;
   
   driver.executeScript(inject, script);
   

3. 然后执行所需的函数为

   driver.executeScript('return foo([bar, baz])').then(function(result) {
     // use the result
   });
   

---

完整的例子

// example.js
import webdriver from 'selenium-webdriver';

const driver = new webdriver.Builder()
  .withCapabilities(webdriver.Capabilities.chrome())
  .build();

driver.get('https://www.google.com');

function foo(rules) {
  var result = [];
  rules.forEach(rule => {
    result.push(rule());
  });
  return result;
}
function bar() { return 'bar' };
function baz() { return 'baz' };

function inject(content) {
  var script = document.createElement('script');
  script.innerHTML = content;
  document.head.appendChild(script);
}
let script = `${bar.toString()} ${baz.toString()} ${foo.toString()}`;

driver.executeScript(inject, script);

driver.executeScript('return foo([bar, baz])').then(function(result) {
  console.log(result);
});

driver.quit();

---

> babel-node example.js

[ 'bar', 'baz' ]