BindingViewInflaterTest.java

package org.robobinding.binder;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import org.robobinding.NonBindingViewInflater;
import org.robobinding.PendingAttributesForView;
import org.robobinding.PredefinedPendingAttributesForView;
import org.robobinding.ViewResolutionErrors;

import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

/**
 * 
 * @since 1.0
 * @version $Revision: 1.0 $
 * @author Cheng Wei
 */
@RunWith(MockitoJUnitRunner.class)
public class BindingViewInflaterTest {
	@Mock
	private BindingAttributeResolver bindingAttributeResolver;
	@Mock
	private BindingAttributeParser bindingAttributeParser;
	private BindingViewInflater bindingViewInflater;

	private int layoutId = 0;

	@Before
	public void setUp() {
		ViewResolutionResult viewResolutionResult = emptyViewResolutionResult();
		when(bindingAttributeResolver.resolve(any(PendingAttributesForView.class))).thenReturn(viewResolutionResult);

		bindingViewInflater = new BindingViewInflater(new NonBindingViewInflaterWithOnViewCreationCall(),
				bindingAttributeResolver, bindingAttributeParser);
	}

	private ViewResolutionResult emptyViewResolutionResult() {
		ResolvedBindingAttributesForView viewBindingAttributes = mock(ResolvedBindingAttributesForView.class);
		ViewResolutionErrors errors = mock(ViewResolutionErrors.class);
		return new ViewResolutionResult(viewBindingAttributes, errors);
	}

	@Test
	public void givenAChildViewWithBindingAttributes_whenInflateView_thenAChildViewBindingAttributesShouldBeAdded() {
		declareAChildView();

		InflatedViewWithRoot inflatedView = bindingViewInflater.inflateView(layoutId);

		assertThat(numberOfChildViewBindingAttributes(inflatedView), equalTo(1));
	}

	private void declareAChildView() {
		Map<String, String> pendingAttributeMappings = Maps.newHashMap();
		pendingAttributeMappings.put("attribute", "attributeValue");
		when(bindingAttributeParser.parse(any(AttributeSet.class))).thenReturn(pendingAttributeMappings);
	}

	@Test
	public void givenAChildViewWithoutBindingAttributes_whenInflateBindingView_thenNoChildViewBindingAttributesShouldBeAdded() {
		declareEmptyChildViews();

		InflatedViewWithRoot inflatedView = bindingViewInflater.inflateView(layoutId);

		assertThat(numberOfChildViewBindingAttributes(inflatedView), equalTo(0));
	}

	private void declareEmptyChildViews() {
		when(bindingAttributeParser.parse(any(AttributeSet.class))).thenReturn(Collections.<String, String> emptyMap());
	}

	@Test
	public void givenAPredefinedPendingAttributesForView_whenInflateView_thenChildViewBindingAttributesIsAdded() {
		InflatedViewWithRoot inflatedView = bindingViewInflater.inflateView(layoutId, createAPredefinedPendingAttributesForView(), null, false);

		assertThat(numberOfChildViewBindingAttributes(inflatedView), equalTo(1));
	}

	private int numberOfChildViewBindingAttributes(InflatedViewWithRoot inflatedView) {
		List<ResolvedBindingAttributesForView> childViewBindingAttributesGroup = inflatedView.childViewBindingAttributesGroup;
		return childViewBindingAttributesGroup.size();
	}

	private Collection<PredefinedPendingAttributesForView> createAPredefinedPendingAttributesForView() {
		PredefinedPendingAttributesForView predefinedPendingAttributesForView = mock(PredefinedPendingAttributesForView.class);
		PendingAttributesForView pendingAttributesForView = mock(PendingAttributesForView.class);
		when(predefinedPendingAttributesForView.createPendingAttributesForView(any(View.class))).thenReturn(pendingAttributesForView);

		return Lists.newArrayList(predefinedPendingAttributesForView);
	}

	private class NonBindingViewInflaterWithOnViewCreationCall implements NonBindingViewInflater {
		@Override
		public View inflateWithoutRoot(int layoutId) {
			View resultView = null;
			performOnViewCreationCall(resultView);
			return resultView;
		}

		private void performOnViewCreationCall(View view) {
			bindingViewInflater.onViewCreated(view, mock(AttributeSet.class));
		}

		@Override
		public View inflate(int layoutId, ViewGroup root, boolean attachToRoot) {
			View resultView = null;
			performOnViewCreationCall(resultView);
			return resultView;
		}
	}
}