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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.arch.lifecycle;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.MatcherAssert.assertThat;
import android.arch.lifecycle.ViewModelProvider.NewInstanceFactory;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class ViewModelProviderTest {
private ViewModelProvider mViewModelProvider;
@Before
public void setup() {
mViewModelProvider = new ViewModelProvider(new ViewModelStore(), new NewInstanceFactory());
}
@Test
public void twoViewModelsWithSameKey() throws Throwable {
String key = "the_key";
ViewModel1 vm1 = mViewModelProvider.get(key, ViewModel1.class);
assertThat(vm1.mCleared, is(false));
ViewModel2 vw2 = mViewModelProvider.get(key, ViewModel2.class);
assertThat(vw2, notNullValue());
assertThat(vm1.mCleared, is(true));
}
@Test
public void localViewModel() throws Throwable {
class VM extends ViewModel1 {
}
try {
mViewModelProvider.get(VM.class);
Assert.fail();
} catch (IllegalArgumentException ignored) {
}
}
@Test
public void twoViewModels() {
ViewModel1 model1 = mViewModelProvider.get(ViewModel1.class);
ViewModel2 model2 = mViewModelProvider.get(ViewModel2.class);
assertThat(mViewModelProvider.get(ViewModel1.class), is(model1));
assertThat(mViewModelProvider.get(ViewModel2.class), is(model2));
}
@Test
public void testOwnedBy() {
final ViewModelStore store = new ViewModelStore();
ViewModelStoreOwner owner = new ViewModelStoreOwner() {
@Override
public ViewModelStore getViewModelStore() {
return store;
}
};
ViewModelProvider provider = new ViewModelProvider(owner, new NewInstanceFactory());
ViewModel1 viewModel = provider.get(ViewModel1.class);
assertThat(viewModel, is(provider.get(ViewModel1.class)));
}
@Test(expected = IllegalStateException.class)
public void testNotAttachedActivity() {
// This is similar to call ViewModelProviders.of in Activity's constructor
ViewModelProviders.of(new FragmentActivity());
}
@Test(expected = IllegalStateException.class)
public void testNotAttachedFragment() {
// This is similar to call ViewModelProviders.of in Activity's constructor
ViewModelProviders.of(new Fragment());
}
public static class ViewModel1 extends ViewModel {
boolean mCleared;
@Override
protected void onCleared() {
mCleared = true;
}
}
public static class ViewModel2 extends ViewModel {
}
}
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