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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 androidx.lifecycle;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.MatcherAssert.assertThat;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.viewmodeltest.TestViewModel;
import androidx.test.annotation.UiThreadTest;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.filters.SmallTest;
import androidx.test.rule.ActivityTestRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
@SmallTest
@RunWith(AndroidJUnit4.class)
public class ViewModelTestInTransaction {
@Rule
public ActivityTestRule<EmptyActivity> mActivityRule =
new ActivityTestRule<>(EmptyActivity.class);
@Test
@UiThreadTest
public void testViewModelInTransactionActivity() {
EmptyActivity activity = mActivityRule.getActivity();
TestFragment fragment = new TestFragment();
activity.getSupportFragmentManager().beginTransaction().add(fragment, "tag").commitNow();
TestViewModel viewModel = ViewModelProviders.of(activity).get(TestViewModel.class);
assertThat(viewModel, is(fragment.mViewModel));
}
@Test
@UiThreadTest
public void testViewModelInTransactionFragment() {
EmptyActivity activity = mActivityRule.getActivity();
ParentFragment parent = new ParentFragment();
activity.getSupportFragmentManager().beginTransaction().add(parent, "parent").commitNow();
assertThat(parent.mExecuted, is(true));
}
public static class ParentFragment extends Fragment {
private boolean mExecuted;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TestFragment fragment = new TestFragment();
getChildFragmentManager().beginTransaction().add(fragment, "tag").commitNow();
TestViewModel viewModel = ViewModelProviders.of(this).get(TestViewModel.class);
assertThat(viewModel, is(fragment.mViewModel));
mExecuted = true;
}
}
public static class TestFragment extends Fragment {
TestViewModel mViewModel;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Fragment parentFragment = getParentFragment();
ViewModelProvider provider = parentFragment != null
? ViewModelProviders.of(parentFragment) : ViewModelProviders.of(getActivity());
mViewModel = provider.get(TestViewModel.class);
assertThat(mViewModel, notNullValue());
}
}
}