使用Espresso测试可绘制的更改 [英] Using Espresso to test drawable changes

问题描述

我是Espresso测试的新手，但似乎没有任何方法可以测试可绘制的更改.

I'm new to Espresso testing, but there doesn't seem like there's any way to test drawable changes.

我有一个教程，是一个ImageView Drawable幻灯片演示，被塞进"一个半透明的TextView中.在我的测试中，我想确保在按下下一个按钮时，已将正确的Drawable插入到教程的ImageView中.

I have a tutorial that is an ImageView Drawable slideshow 'tucked into' a semi-transparent TextView. In my tests, I want to ensure that when the next button is pressed, the proper Drawable has been inserted into the tutorial's ImageView.

没有默认的Matcher用于检查Drawable，因此我着手使用 https://stackoverflow.com/a/28785178/981242 .不幸的是，由于无法检索ImageView的活动Drawable的ID，因此我无法完成matchesSafely()的实现.

There is no default Matcher to check for Drawables, so I set out to write my own using https://stackoverflow.com/a/28785178/981242. Unfortunately, since there is no way to retrieve the id of an ImageView's active Drawable, I can't complete the matchesSafely() implementation.

这不是测试活动的Drawable的唯一用例.人们在这种情况下通常使用什么工具?

This can't be the only use case for testing active Drawables. What is the tool that people normally use for situations like this?

推荐答案

我不希望比较位图，而应遵循以下答案的建议: https://stackoverflow.com/a/14474954/1396068

I prefer not to compare bitmaps and instead follow this answer's advice: https://stackoverflow.com/a/14474954/1396068

设置图像视图的可绘制对象时，还要使用setTag(R.drawable.your_drawable)将可绘制对象ID存储在其标记中.然后使用Espresso的withTagValue(equalTo(R.drawable.your_drawable))匹配器检查标签是否正确.

When setting the image view's drawable, also store the drawable ID in its tag with setTag(R.drawable.your_drawable). Then use Espresso's withTagValue(equalTo(R.drawable.your_drawable)) matchers to check for the correct tag.

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