獲取從ElementArrayFinder給我一個特定的元素髮出

Question

這是Get a specific element from an ElementArrayFinder in protractor based on the text of getText()

因此，一個跟進的問題，用我給出了答案，我用.filter()方法。它發現我想要的行，但我得到

Failed: Index out of bound. Trying to access element at index: 0, but there are only 0 elements that match locator By(css selector, li) 

所以，我把一些日誌記入它。這是我的代碼：

function getCardByName(name) { 
    let cards = element.all(by.css(li)); 
    cards.count().then(c => console.log("The count is ", c)); 
    let theCard = cards.filter(function(el, i) { 
     return el.getText().then(function(text) { 
      text = text.substr(0, text.search(" ID:")); 
      console.log(i + ") Does the text, " + text + ", match name, " + name + "? " + (text == name) + " | " + (text === name)); 
      text == name 
     }); 
    }).first(); 

    return new Card(theCard); 
} 

此代碼將選擇並返回第一個ElementFinder對象，並將其作爲參數傳遞給Card對象。

結果我得到我的實際頁面上是（名字是不是真實的）：

The count is 7 
0) Does text, KERGER, FEYSAL, equal name, CRAVEN, LILLARD? false | false 
1) Does text, JENNINGS, JEWELLAN, equal name, CRAVEN, LILLARD? false | false 
2) Does text, CRAVEN, LILLARD, equal name, CRAVEN, LILLARD? true | true 
3) Does text, HORSTMANN, GREG, equal name, CRAVEN, LILLARD? false | false 
4) Does text, MEUSA, FRANKLIN, equal name, CRAVEN, LILLARD? false | false 
5) Does text, LAURITO, RANDOLPH, equal name, CRAVEN, LILLARD? false | false 
6) Does text, JHANSON, LORENE, equal name, CRAVEN, LILLARD? false | false 
0) Does text, KERGER, FEYSAL, equal name, CRAVEN, LILLARD? false | false 
1) Does text, JENNINGS, JEWELLAN, equal name, CRAVEN, LILLARD? false | false 
2) Does text, CRAVEN, LILLARD, equal name, CRAVEN, LILLARD? true | true 
3) Does text, HORSTMANN, GREG, equal name, CRAVEN, LILLARD? false | false 
4) Does text, MEUSA, FRANKLIN, equal name, CRAVEN, LILLARD? false | false 
5) Does text, LAURITO, RANDOLPH, equal name, CRAVEN, LILLARD? false | false 
6) Does text, JHANSON, LORENE, equal name, CRAVEN, LILLARD? false | false 
0) Does text, KERGER, FEYSAL, equal name, CRAVEN, LILLARD? false | false 
1) Does text, JENNINGS, JEWELLAN, equal name, CRAVEN, LILLARD? false | false 
2) Does text, CRAVEN, LILLARD, equal name, CRAVEN, LILLARD? true | true 
3) Does text, HORSTMANN, GREG, equal name, CRAVEN, LILLARD? false | false 
... 


Failed: Index out of bound. ... 

這正好在6行循環13次（使用頁面實際上我測試反對）。但是它確實找到了我想要查找的行（請參閱結果的第3行上的「true | true」）爲什麼它循環了13次並且沒有停止，並且沒有將匹配結果加載到結果數組中？

Answer 1

你實際上並沒有返回一個布爾值，我所看到的（如果這是從你的代碼複製粘貼）。你要做的是（注意「return text == name」）：

function getCardByName(name) { 
    let cards = element.all(by.css(li)); 
    cards.count().then(c => console.log("The count is ", c)); 
    let theCard = cards.filter(function(el, i) { 
     return el.getText().then(function(text) { 
      text = text.substr(0, text.search(" ID:")); 
      console.log(i + ") Does the text, " + text + ", match name, " + name + "? " + (text == name) + " | " + (text === name)); 
      return text == name; 
     }); 
    }).first(); 

    return new Card(theCard); 
}