测试背景颜色浓咖啡Android

Question

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？

我制作了一个自定义匹配器,类似于@Irfan建议的,谢谢!

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]);
        }
    };
}

Answer 1

在我的测试中,我有以下用于测试EditText颜色的匹配器:

public static Matcher<View> withTextColor(final int color) {
    Checks.checkNotNull(color);
    return new BoundedMatcher<View, EditText>(EditText.class) {
        @Override
        public boolean matchesSafely(EditText warning) {
            return color == warning.getCurrentTextColor();
        }
        @Override
        public void describeTo(Description description) {
            description.appendText("with text color: ");
        }
    };
}

用法是:

onView(withId(R.id.password_edittext)).check(matches(withTextColor(Color.RED)));

Answer 2

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`

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

你可以这样试试

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

然后

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

希望这会让你开始.

Answer 3

我迟到了，但这可能对其他人有帮助

    public static Matcher<View> matchesBackgroundColor(final int expectedResourceId) {
    return new BoundedMatcher<View, View>(View.class) {
        int actualColor;
        int expectedColor;
        String message;

        @Override
        protected boolean matchesSafely(View item) {
            if (item.getBackground() == null) {
                message = item.getId() + " does not have a background";
                return false;
            }
            Resources resources = item.getContext().getResources();
            expectedColor = ResourcesCompat.getColor(resources, expectedResourceId, null);

            try {
                actualColor = ((ColorDrawable) item.getBackground()).getColor();
            }
            catch (Exception e) {
                actualColor = ((GradientDrawable) item.getBackground()).getColor().getDefaultColor();
            }
            finally {
                if (actualColor == expectedColor) {
                    Timber.i("Success...: Expected Color " + String.format("#%06X", (0xFFFFFF & expectedColor))
                            + " Actual Color " + String.format("#%06X", (0xFFFFFF & actualColor)));
                }
            }
            return actualColor == expectedColor;
        }
        @Override
        public void describeTo(final Description description) {
            if (actualColor != 0) { message = "Background color did not match: Expected "
                    +  String.format("#%06X", (0xFFFFFF & expectedColor))
                    + " was " + String.format("#%06X", (0xFFFFFF & actualColor));
            }
            description.appendText(message);
        }
    };
}

我还以十六进制格式记录了预期的和实际的颜色，这可能会有所帮助。

用法： onView(withId(R.id.viewId)).check(matches(matchesBackgroundColor(R.color.colorId)));