1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.databinding.testapp;
18
19import android.databinding.DataBindingUtil;
20import android.databinding.ViewDataBinding;
21import android.support.test.InstrumentationRegistry;
22import android.support.test.rule.ActivityTestRule;
23
24/**
25 * Convenience rule for tests that use data binding.
26 * @param <T> The type of the generated binding class
27 */
28public class DataBindingTestRule<T extends ViewDataBinding>
29        extends ActivityTestRule<TestActivity> {
30    final int mLayoutId;
31    private T mBinding;
32    public DataBindingTestRule(int layoutId) {
33        super(TestActivity.class);
34        mLayoutId = layoutId;
35    }
36
37    @Override
38    protected void afterActivityLaunched() {
39        super.afterActivityLaunched();
40        InstrumentationRegistry.getInstrumentation().runOnMainSync(new Runnable() {
41            @Override
42            public void run() {
43                mBinding = DataBindingUtil.setContentView(getActivity(), mLayoutId);
44            }
45        });
46    }
47
48    public T getBinding() {
49        return mBinding;
50    }
51
52    public void executePending() {
53        try {
54            runOnUiThread(new Runnable() {
55                @Override
56                public void run() {
57                    mBinding.executePendingBindings();
58                }
59            });
60        } catch (Throwable throwable) {
61            throw new RuntimeException("unexpected problem in execute pending", throwable);
62        }
63    }
64}
65