Matchers file from Episode 29 of Caster.IO - Creating Custom ViewMatchers

TaskoMatchers.java

package com.donnfelker.tasko;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.support.test.espresso.matcher.BoundedMatcher;
import android.text.TextUtils;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

public class TaskoMatchers {

    public static Matcher<View> withTaskViewName(final String expected) {
        return new TypeSafeMatcher<View>() {
            @Override
            protected boolean matchesSafely(View item) {
                if(item != null && item.findViewById(R.id.task_item_task_name) != null) {
                    TextView taskName = (TextView) item.findViewById(R.id.task_item_task_name);
                    if(TextUtils.isEmpty(taskName.getText())) {
                        return false;
                    } else {
                        return taskName.getText().equals(expected);
                    }
                } else {
                    return false;
                }
            }

            @Override
            public void describeTo(Description description) {
                description.appendText("Looked for " + expected + " in the task_item.xml file");
            }
        };
    }

    public static Matcher<View> withCompoundDrawable(final int resourceId) {
        return new BoundedMatcher<View, TextView>(TextView.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("has compound drawable resource " + resourceId);
            }

            @Override
            public boolean matchesSafely(TextView textView) {
                for (Drawable drawable : textView.getCompoundDrawables()) {
                    if (sameBitmap(textView.getContext(), drawable, resourceId)) {
                        return true;
                    }
                }
                return false;
            }
        };
    }

    public static Matcher<View> withImageDrawable(final int resourceId) {
        return new BoundedMatcher<View, ImageView>(ImageView.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("has image drawable resource " + resourceId);
            }

            @Override
            public boolean matchesSafely(ImageView imageView) {
                return sameBitmap(imageView.getContext(), imageView.getDrawable(), resourceId);
            }
        };
    }

    private static boolean sameBitmap(Context context, Drawable drawable, int resourceId) {
        Drawable otherDrawable = context.getResources().getDrawable(resourceId);
        if (drawable == null || otherDrawable == null) {
            return false;
        }
        if (drawable instanceof StateListDrawable && otherDrawable instanceof StateListDrawable) {
            drawable = drawable.getCurrent();
            otherDrawable = otherDrawable.getCurrent();
        }
        if (drawable instanceof BitmapDrawable) {
            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
            Bitmap otherBitmap = ((BitmapDrawable) otherDrawable).getBitmap();
            return bitmap.sameAs(otherBitmap);
        }
        return false;
    }
}