I am trying to understand the Protractor code for locating elements
within an ng-repeat. I work with the Python binding for WebDriver so I
want to mimic the behavior within Python. Within the findRepeaterRows
function there is the code
/* while it is not a comment node OR ... */ while (elem.nodeType != 8 ||
/* the nodeValue contains the specific ng-repeat, 'repeater' we are
looking for */ elem.nodeValue.indexOf(repeater) == -1) { /* and if it is
an element node */ if (elem.nodeType == 1) { /* push it into the rows
array */ row.push(elem); } /* move onto the next sibling */ elem =
elem.nextSibling; }
I am having a tough time reading/interpreting what the inner while loop
is doing. My hang-up is in the definition of a Node [1,2] and the
nextSibling [3]. Looking at the example within Protractor's API
documentation [4]
// Returns a promise that resolves to an array of WebElements containing
// the DIVs for the second book.
var bookInfo = element.all(by.repeater('book in library').row(1));
I am not sure what nodes get hit when it loops through and what
nodeValue it is trying to match with or really what the value is of
various node types (I see it is looking for the 'repeater' we
specify,elem.nodeValue.indexOf(repeater) == -1).
Could anyone explain this using pseudo code and maybe the Protractor's
API documentation [4] or the internal Protractor tests? Thanks.
I have tried running the Protractor runner with a debug breakpoint,
browser.debugger() [5], but it does not seem to be stopping. I am not
running under Windows but Linux so I don't think I am hitting issue
#552, maybe undergrading selenium will help (#907)? Again thanks for any
insight you can provide.
[1] https://developer.mozilla.org/en-US/docs/Web/API/Node
[2] https://developer.mozilla.org/en-US/docs/Web/API/Node.nodeType
[3] https://developer.mozilla.org/en-US/docs/Web/API/Node.nextSibling
[4]
https://github.com/angular/protractor/blob/master/docs/api.md#api-protractorby-prototype-repeater
[5] https://github.com/angular/protractor/blob/master/docs/debugging.md
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