测试背景色 espresso Android [英] Testing background color espresso Android

问题描述

是否可以使用浓缩咖啡检查背景颜色是否与给定颜色匹配?

Is it possible to check if the background color matches a given color with espresso?

更新:

我做了一个自定义匹配器，类似于@Irfan 建议的，谢谢！

I made a custom matcher, similar to what @Irfan suggested, thanks!

public static Matcher<Object> backgroundShouldHaveColor(int expectedColor) {
    return buttondShouldHaveBackgroundColor(equalTo(expectedColor));
}
private static Matcher<Object> buttonShouldHaveBackgroundColor(final Matcher<Integer> expectedObject) {
    final int[] color = new int[1];
    return new BoundedMatcher<Object, Button>( Button.class) {
        @Override
        public boolean matchesSafely(final Button actualObject) {

            color[0] =((ColorDrawable) actualObject.getBackground()).getColor();


            if( expectedObject.matches(color[0])) {
                return true;
            } else {
                return false;
            }
        }
        @Override
        public void describeTo(final Description description) {
            // Should be improved!
            description.appendText("Color did not match "+color[0]);
        }
    };
}

推荐答案

我不确定，但我们可以检索一些元素的颜色，如按钮和文本视图 `

I am not sure about that but we can retrieve the color of some of elements like button and text views `

Button button = (Button) findViewById(R.id.my_button);
Drawable buttonBackground = button.getBackground();

你可以试试这个

ColorDrawable b_color = (ColorDrawable) button.getBackground();

然后

int color = b_color.getColor();
if (color == R.color.green) {
    log("color is green");
}

希望这能帮助您入门.

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