Android testing samples

A collection of samples demonstrating different frameworks and techniques for automated testing.

Espresso Samples

BasicSample - Basic Espresso sample

CustomMatcherSample - Shows how to extend Espresso to match the hint property of an EditText

DataAdapterSample - Showcases the onData() entry point for Espresso, for lists and AdapterViews

FragmentScenarioSample - Basic usage of FragmentScenario with Espresso.

IdlingResourceSample - Synchronization with background jobs

IntentsBasicSample - Basic usage of intended() and intending()

IntentsAdvancedSample - Simulates a user fetching a bitmap using the camera

MultiWindowSample - Shows how to point Espresso to different windows

RecyclerViewSample - RecyclerView actions for Espresso

ScreenshotSample - Screenshot capturing and saving using Espresso and androidx.test.core APIs

WebBasicSample - Use Espresso-web to interact with WebViews

BasicSampleBundled - Basic sample for Eclipse and other IDEs

MultiProcessSample - Showcases how to use multiprocess Espresso.

UiAutomator Sample

BasicSample - Basic UI Automator sample

AndroidJUnitRunner Sample

AndroidJunitRunnerSample - Showcases test annotations, parameterized tests and testsuite creation

JUnit4 Rules Sample

**All previous samples use ActivityTestRule or IntentsTestRule but there’s one specific to ServiceTestRule:

BasicSample - Simple usage of ActivityTestRule

IntentsBasicSample - Simple usage of IntentsTestRule

ServiceTestRuleSample - Simple usage of ServiceTestRule

Prerequisites

• Android SDK v28
• Android Build Tools v28.03

Getting Started

These samples use the Gradle build system. To build a project, enter the project directory and use the ./gradlew assemble command or use “Import Project” in Android Studio.

• Use ./gradlew connectedAndroidTest to run the tests on a connected emulator or device.
• Use ./gradlew test to run the unit test on your local host.

There is a top-level build.gradle file if you want to build and test all samples from the root directory. This is mostly helpful to build on a CI (Continuous Integration) server.

AndroidX Test Library

Many of these samples use the AndroidX Test Library. Visit the Testing site on developer.android.com for more information.

Experimental Bazel Support

Some of these samples can be tested with Bazel on Linux. These samples contain a BUILD.bazel file, which is similar to a build.gradle file. The external dependencies are defined in the top level WORKSPACE file.

This is experimental feature. To run the tests, please install the latest version of Bazel (0.12.0 or later) by following the instructions on the Bazel website.

Bazel commands

# Clone the repository if you haven't.
$ git clone https://github.com/google/android-testing
$ cd android-testing

# Edit the path to your local SDK at the top of the WORKSPACE file
$ $EDITOR WORKSPACE

# Test everything in a headless mode (no graphical display)
$ bazel test //... --config=headless

# Test a single test, e.g. ui/espresso/BasicSample/BUILD.bazel
$ bazel test //ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_21_x86 --config=headless

# Query for all android_instrumentation_test targets
$ bazel query 'kind(android_instrumentation_test, //...)'
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_23_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_22_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_21_x86
//ui/uiautomator/BasicSample:BasicSampleInstrumentationTest_19_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_23_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_22_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_21_x86
//ui/espresso/RecyclerViewSample:RecyclerViewSampleInstrumentationTest_19_x86
//ui/espresso/MultiWindowSample:MultiWindowSampleInstrumentationTest_23_x86
//ui/espresso/MultiWindowSample:MultiWindowSampleInstrumentationTest_22_x86
...

# Test everything with GUI enabled
$ bazel test //... --config=gui

# Test with a local device or emulator. Ensure that `adb devices` lists the device.
$ bazel test //... --config=local_device

# If multiple devices are connected, add --device_serial_number=$identifier where $identifier is the name of the device in `adb devices`
$ bazel test //... --config=local_device --test_arg=--device_serial_number=$identifier

For more information, check out the documentation for Android Instrumentation Tests in Bazel. You may also want to check out Building an Android App with Bazel, and the list of Android Rules in the Bazel Build Encyclopedia.

Known issues:

• Building of APKs is supported on Linux, Mac and Windows, but testing is only supported on Linux.
• android_instrumentation_test.target_device attribute still needs to be specified even if --config=local_device is used.
• If using a local device or emulator, the APKs are not uninstalled automatically after the test. Use this command to
  remove the packages:
  • adb shell pm list packages com.example.android.testing | cut -d ':' -f 2 | tr -d '\r' | xargs -L1 -t adb uninstall

Please file Bazel related issues against the Bazel repository instead of this repository.

Support

• Google+ Community: https://plus.google.com/communities/105153134372062985968
• Stack Overflow: http://stackoverflow.com/questions/tagged/android-testing

If you’ve found an error in this sample, please file an issue:
https://github.com/googlesamples/android-testing

Patches are encouraged, and may be submitted by forking this project and
submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.

License

Copyright 2015 The Android Open Source Project, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor
license agreements. See the NOTICE file distributed with this work for
additional information regarding copyright ownership. The ASF licenses this
file to you 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.