javascript 单击量角器中元素的给定坐标
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Clicking on given coordinates of element in protractor
提问by Bowzer2
I want to click on a specific location of my canvaselement, so I wrote the following Protractor code:
我想单击canvas元素的特定位置，因此我编写了以下量角器代码：
var canvas = element(by.id("canvas"));
var clickCanvas = function(toRight, toBottom) {
browser.actions()
.mouseMove(canvas, -toRight, -toBottom)
.click();
}
toRight/toBottomare the numbers of pixels where the click should be made, relative the top left corner of my canvas.
toRight/toBottom是应该进行点击的像素数，相对于我的画布的左上角。
However, the click does not seem to be executed at the given coordinates. I got the snippet from a related questionon the Software Quality Assurance & Testing stack exchange.
但是，单击似乎并未在给定坐标处执行。我从有关软件质量保证和测试堆栈交换的相关问题中获得了片段。
Can you confirm that this snippet works?
Can you suggest alternatives?
你能确认这个片段有效吗？
你能提出替代方案吗？
回答by Olov
I made this work, passing an object representing the coordinate as the second argument of mouseMove:
我完成了这项工作，将一个表示坐标的对象作为第二个参数传递给mouseMove：
var canvas = element(by.id("canvas"));
var clickCanvas = function (toRight, toBottom) {
browser.actions()
.mouseMove(canvas, {x: toRight, y: toBottom})
.click()
.perform();
};
回答by Sirk
you missed out .perform()
你错过了 .perform()
browser.actions().mouseMove(canvas, -toRight, -toBottom).click().perform();
browser.actions().mouseMove(canvas, -toRight, -toBottom).click().perform();
I use this a few times in my tests and confirm this works
我在测试中多次使用它并确认它有效
回答by alecxe
In this case, you have missed the perform()call:
在这种情况下，您错过了perform()电话：
browser.actions()
.mouseMove(canvas, -toRight, -toBottom)
.click(); // < no .perform() HERE
This is one of the common mistakes when writing e2e tests in Protractor/WebDriverJS.
这是在 Protractor/WebDriverJS 中编写 e2e 测试时常见的错误之一。
To prevent these errors from happening, there is a eslint-plugin-protractorplugin to ESLintthat would warn youif perform()was no called on browser.actions()chain.
为了防止发生这些错误，有一个eslint-plugin-protractor插件，ESLint这会警告你，如果perform()没有所谓的上browser.actions()链。
