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/*
* Copyright (C) 2014 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 com.google.android.apps.common.testing.ui.testapp;
import static com.google.android.apps.common.testing.ui.espresso.Espresso.onView;
import static com.google.android.apps.common.testing.ui.espresso.Espresso.registerIdlingResources;
import static com.google.android.apps.common.testing.ui.espresso.action.ViewActions.click;
import static com.google.android.apps.common.testing.ui.espresso.assertion.ViewAssertions.matches;
import static com.google.android.apps.common.testing.ui.espresso.matcher.ViewMatchers.withId;
import static com.google.android.apps.common.testing.ui.espresso.matcher.ViewMatchers.withText;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.android.apps.common.testing.ui.espresso.contrib.CountingIdlingResource;
import com.google.android.apps.common.testing.ui.testapp.SyncActivity.HelloWorldServer;
import android.test.ActivityInstrumentationTestCase2;
import android.test.suitebuilder.annotation.LargeTest;
/**
* Example for {@link CountingIdlingResource}. Demonstrates how to wait on a delayed response from
* request before continuing with a test.
*/
@LargeTest
public class AdvancedSynchronizationTest extends ActivityInstrumentationTestCase2<SyncActivity> {
private class DecoratedHelloWorldServer implements HelloWorldServer {
private final HelloWorldServer realHelloWorldServer;
private final CountingIdlingResource helloWorldServerIdlingResource;
private DecoratedHelloWorldServer(HelloWorldServer realHelloWorldServer,
CountingIdlingResource helloWorldServerIdlingResource) {
this.realHelloWorldServer = checkNotNull(realHelloWorldServer);
this.helloWorldServerIdlingResource = checkNotNull(helloWorldServerIdlingResource);
}
@Override
public String getHelloWorld() {
// Use CountingIdlingResource to track in-flight calls to getHelloWorld (a simulation of a
// network call). Whenever the count goes to zero, Espresso will be notified that this
// resource is idle and the test will be able to proceed.
helloWorldServerIdlingResource.increment();
try {
return realHelloWorldServer.getHelloWorld();
} finally {
helloWorldServerIdlingResource.decrement();
}
}
}
@SuppressWarnings("deprecation")
public AdvancedSynchronizationTest() {
// This constructor was deprecated - but we want to support lower API levels.
super("com.google.android.apps.common.testing.ui.testapp", SyncActivity.class);
}
@Override
public void setUp() throws Exception {
super.setUp();
SyncActivity activity = getActivity();
HelloWorldServer realServer = activity.getHelloWorldServer();
// Here, we use CountingIdlingResource - a common convenience class - to track the idle state of
// the server. You could also do this yourself, by implementing the IdlingResource interface.
CountingIdlingResource countingResource = new CountingIdlingResource("HelloWorldServerCalls");
activity.setHelloWorldServer(new DecoratedHelloWorldServer(realServer, countingResource));
registerIdlingResources(countingResource);
}
public void testCountingIdlingResource() {
// Request the "hello world!" text by clicking on the request button.
onView(withId(R.id.request_button)).perform(click());
// Espresso waits for the resource to go idle and then continues.
// The check if the text is visible can pass now.
onView(withId(R.id.status_text)).check(matches(withText(R.string.hello_world)));
}
}
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