使用量角器测试Chart.js画布 [英] Test a Chart.js canvas with Protractor

问题描述

我对量角器很陌生，如果这是一个愚蠢的问题，对不起.我正在研究测试应用程序，需要测试Chart.js图中的值.

I'm fairly new to protractor so sorry if this is a stupid question. I'm looking into testing an application and need test the values inside a Chart.js graph.

有没有人知道如何使我的量角器程序在画布中显示.

Has anyone got any ideas on how to get my protractor program to look inside the canvas.

这是HTML中的画布输出.

This is the canvas output in HTML.

<canvas id="test" 
        class="chart chart-line ng-isolate-scope" 
        data="test.data" 
        labels="test.labels" 
        series="test.series" 
        legend="true" 
        options="test.options" 
        colours="test.colours" 
        width="1816" 
        height="800" 
        style="width: 908px; 
        height: 400px;">
</canvas>

谢谢.

推荐答案

量角器可以获取画布的属性，但无法访问其中创建的对象.但这取决于您要做什么.画布测试的策略可能包括图像差异和使用browser.actions 进行操作.

Protractor can get attributes of the canvas, but it can't access object created within it. But it depends what you're looking to do. Strategies for canvas testing might include image diffs, and string diffs, and often make use of browser.actions for manipulating them.

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