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package com.xtremelabs.robolectric.shadows;
import android.os.Looper;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.TextView;
import com.xtremelabs.robolectric.Robolectric;
import com.xtremelabs.robolectric.util.Transcript;
import static com.xtremelabs.robolectric.Robolectric.*;
import static com.xtremelabs.robolectric.matchers.TextViewHasTextMatcher.hasText;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.CoreMatchers.sameInstance;
import static org.hamcrest.core.CombinableMatcher.both;
import static org.junit.Assert.assertThat;
public class AdapterViewBehavior {
public static void shouldActAsAdapterView(AdapterView adapterView) throws Exception {
Robolectric.shadowOf(Looper.getMainLooper()).pause();
testSetAdapter_ShouldCauseViewsToBeRenderedAsynchronously(adapterView);
testSetAdapter_ShouldSelectFirstItemAsynchronously(adapterView);
testSetAdapter_ShouldFireOnNothingSelectedWhenAdapterCountIsReducedToZero(adapterView);
shouldIgnoreSetSelectionCallsWithInvalidPosition(adapterView);
shouldOnlyUpdateOnceIfInvalidatedMultipleTimes(adapterView);
testSetEmptyView_ShouldHideAdapterViewIfAdapterIsNull(adapterView);
testSetEmptyView_ShouldHideAdapterViewIfAdapterViewIsEmpty(adapterView);
testSetEmptyView_ShouldHideEmptyViewIfAdapterViewIsNotEmpty(adapterView);
testSetEmptyView_ShouldHideEmptyViewWhenAdapterGetsNewItem(adapterView);
}
private static void shouldIgnoreSetSelectionCallsWithInvalidPosition(AdapterView adapterView) {
final Transcript transcript = new Transcript();
adapterView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
transcript.add("onItemSelected fired");
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
ShadowHandler.idleMainLooper();
transcript.assertNoEventsSoFar();
adapterView.setSelection(AdapterView.INVALID_POSITION);
ShadowHandler.idleMainLooper();
transcript.assertNoEventsSoFar();
}
private static void testSetAdapter_ShouldCauseViewsToBeRenderedAsynchronously(AdapterView adapterView) throws Exception {
adapterView.setAdapter(new CountingAdapter(2));
assertThat(adapterView.getCount(), equalTo(2));
assertThat(adapterView.getChildCount(), equalTo(0));
ShadowHandler.idleMainLooper();
assertThat(adapterView.getChildCount(), equalTo(2));
assertThat((TextView) adapterView.getChildAt(0), hasText("Item 0"));
assertThat((TextView) adapterView.getChildAt(1), hasText("Item 1"));
}
private static void testSetAdapter_ShouldSelectFirstItemAsynchronously(final AdapterView adapterView) throws Exception {
final Transcript transcript = new Transcript();
adapterView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
assertThat(parent, sameInstance(adapterView));
assertThat(view, both(sameInstance(adapterView.getChildAt(position))).and(not(nullValue())));
assertThat(id, equalTo(adapterView.getAdapter().getItemId(position)));
transcript.add("selected item " + position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
adapterView.setAdapter(new CountingAdapter(2));
transcript.assertNoEventsSoFar();
ShadowHandler.idleMainLooper();
transcript.assertEventsSoFar("selected item 0");
}
private static void testSetAdapter_ShouldFireOnNothingSelectedWhenAdapterCountIsReducedToZero(final AdapterView adapterView) throws Exception {
final Transcript transcript = new Transcript();
adapterView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
transcript.add("onNothingSelected fired");
}
});
CountingAdapter adapter = new CountingAdapter(2);
adapterView.setAdapter(adapter);
ShadowHandler.idleMainLooper();
transcript.assertNoEventsSoFar();
adapter.setCount(0);
ShadowHandler.idleMainLooper();
transcript.assertEventsSoFar("onNothingSelected fired");
}
private static void testSetEmptyView_ShouldHideAdapterViewIfAdapterIsNull(final AdapterView adapterView) throws Exception {
adapterView.setAdapter(null);
View emptyView = new View(adapterView.getContext());
adapterView.setEmptyView(emptyView);
assertThat(adapterView.getVisibility(), is(View.GONE));
assertThat(emptyView.getVisibility(), is(View.VISIBLE));
}
private static void testSetEmptyView_ShouldHideAdapterViewIfAdapterViewIsEmpty(final AdapterView adapterView) throws Exception {
adapterView.setAdapter(new CountingAdapter(0));
View emptyView = new View(adapterView.getContext());
adapterView.setEmptyView(emptyView);
assertThat(adapterView.getVisibility(), is(View.GONE));
assertThat(emptyView.getVisibility(), is(View.VISIBLE));
}
private static void testSetEmptyView_ShouldHideEmptyViewIfAdapterViewIsNotEmpty(final AdapterView adapterView) throws Exception {
adapterView.setAdapter(new CountingAdapter(1));
View emptyView = new View(adapterView.getContext());
adapterView.setEmptyView(emptyView);
assertThat(adapterView.getVisibility(), is(View.VISIBLE));
assertThat(emptyView.getVisibility(), is(View.GONE));
}
private static void testSetEmptyView_ShouldHideEmptyViewWhenAdapterGetsNewItem(final AdapterView adapterView) throws Exception {
CountingAdapter adapter = new CountingAdapter(0);
adapterView.setAdapter(adapter);
View emptyView = new View(adapterView.getContext());
adapterView.setEmptyView(emptyView);
assertThat(adapterView.getVisibility(), is(View.GONE));
assertThat(emptyView.getVisibility(), is(View.VISIBLE));
adapter.setCount(1);
ShadowHandler.idleMainLooper();
assertThat(adapterView.getVisibility(), is(View.VISIBLE));
assertThat(emptyView.getVisibility(), is(View.GONE));
}
private static void testSetEmptyView_ShouldHideAdapterViewWhenAdapterBecomesEmpty(final AdapterView adapterView) throws Exception {
CountingAdapter adapter = new CountingAdapter(1);
adapterView.setAdapter(adapter);
View emptyView = new View(adapterView.getContext());
adapterView.setEmptyView(emptyView);
assertThat(adapterView.getVisibility(), is(View.GONE));
assertThat(emptyView.getVisibility(), is(View.VISIBLE));
adapter.setCount(0);
ShadowHandler.idleMainLooper();
assertThat(adapterView.getVisibility(), is(View.VISIBLE));
assertThat(emptyView.getVisibility(), is(View.GONE));
}
private static void shouldOnlyUpdateOnceIfInvalidatedMultipleTimes(final AdapterView adapterView) {
final Transcript transcript = new Transcript();
CountingAdapter adapter = new CountingAdapter(2) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
transcript.add("getView for " + position);
return super.getView(position, convertView, parent);
}
};
adapterView.setAdapter(adapter);
transcript.assertNoEventsSoFar();
adapter.notifyDataSetChanged();
adapter.notifyDataSetChanged();
ShadowHandler.idleMainLooper();
transcript.assertEventsSoFar("getView for 0", "getView for 1");
}
}
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