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Android App Test

Android App Test Vorgehensweise

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Android App Test

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Android App Test - Inhaltsverzeichnis

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Figure 2 shows the coverage tool window for a calculator unit test that tests for addition, subtraction, multiplication, and division. Figure 2. See the code coverage percentages for your application.

For more information about local unit tests, see Building local unit tests. When you run a JUnit or instrumented test, the results appear in the Run window.

A green bar means all tests succeeded and a red bar means at least one test failed. Figure 3 shows a successful test run. Figure 3.

Test results appear in the Run window. The Run window displays the tests in a tree view on the left, and the results and messages for the current test suite in the output pane on the right.

Use the toolbars, context menus, and status icons to manage the test results, as follows:. If a unit test contains assertEquals failures from comparing two string objects, you can see what the differences are between the two string objects to find out what caused the failures, as follows:.

Content and code samples on this page are subject to the licenses described in the Content License.

Android Studio. Download What's new User guide Preview. Meet Android Studio. Manage your project. Write your app. Build and run your app.

Run apps on the emulator. Run apps on a hardware device. Configure your build. Debug your app. Test your app. Profile your app. Benchmark your app. Inspect CPU activity.

Publish your app. Command line tools. Google is committed to advancing racial equity for Black communities. See how. Android Developers. Test types and location The location of your test code depends on the type of test you are writing.

Add a new test To create either a local unit test or an instrumented test, you can create a new test for a specific class or method by following these steps: Open the Java file containing the code you want to test.

In the menu that appears, click Create New Test. In the Create Test dialog, edit any fields and select any methods to generate, and then click OK.

In the Choose Destination Directory dialog, click the source set corresponding to the type of test you want to create: androidTest for an instrumented test or test for a local unit test.

Then click OK. Alternatively, you can create a generic Java file in the appropriate test source set as follows: In the Project window on the left, click the drop-down menu and select the Project view.

Expand the appropriate module folder and the nested src folder. To add a local unit test, expand the test folder and the nested java folder; to add an instrumented test, expand the androidTest folder and the nested java folder.

Name the file and then click OK. Create instrumented test for a build variant If your project includes build variants with unique source sets, then you might want corresponding instrumented test source sets.

To add a testing source set for your build variant, follow these steps: In the Project window on the left, click the drop-down menu and select the Project view.

For the directory name, enter "androidTest VariantName. Enter "java" as the directory name, and then click OK. To learn more, go to Configure product flavors.

Change the test build type By default, all tests run against the debug build type. To create a test module, proceed as follows: Create a library module.

In the module level build file , apply the com. Sync your project. Run a test To run a test, proceed as follows: Be sure your project is synchronized with Gradle by clicking Sync Project in the toolbar.

Run your test in one of the following ways: In the Project window, right-click a test and click Run.

In the Code Editor, right-click a class or method in the test file and click Run to test all methods in the class.

To run all tests, right-click on the test directory and click Run tests. View test coverage The test coverage tool is available for local unit tests to track the percentage and areas of your app code that your unit tests have covered.

The following procedure shows how to run a unit test inline from the editor: Double-click the unit test you want to run. In the editor, place your cursor in the line you want to run with coverage.

If you place your cursor in the class declaration, all test methods in that class run. If you place your cursor in a method declaration, all code in that method runs.

If you place your cursor on a particular line within a method, only that line runs. Right-click the line where you placed your cursor.

In the context menu, choose Run test-name with coverage. View the test results When you run a JUnit or instrumented test, the results appear in the Run window.

Use the toolbars, context menus, and status icons to manage the test results, as follows: Use the run toolbar to rerun the current test, stop the current test, rerun failed tests not shown because it is available for unit tests only , pause output, and dump threads.

Use the testing toolbar to filter and sort test results. You can also expand or collapse nodes, show test coverage, and import or export test results.

Click the context menu to track the running test, show inline statistics, scroll to the stacktrace, open the source code at an exception, auto scroll to the source, and select the first failed test when the test run completes.

Test status icons indicate whether a test has an error, was ignored, failed, is in progress, has passed, is paused, was terminated, or was not run.

We recommend you use this app if you want an easy-to-use app to do a through test of hardware of your Android device. So, be sure to check it out.

Download Phone Doctor Plus Free 2. Sure, Phone Doctor Plus has a better user interface and is more user-friendly, but Phone Check allows you to test the hardware extensively and monitor the hardware readings in the background.

Apart from that, there is a comprehensive guided test where you can choose specific components and sensors for hardware testing.

Having said all of that, what I love about this app is how quick it is in performing and reporting the tests. Furthermore, besides testing, this app also offers vast details about the hardware on your Android device.

Overall, Phone Check and Test is one of the best apps to test hardware on Android devices and if Phone Doctor Plus does not cut for you, this app will definitely stand up to your expectations.

Download Phone Check and Test Free 3. TestM Hardware TestM is another excellent app for testing hardware on Android devices, be it a smartphone or a tablet.

The app allows you to inspect the screen, sound, connectivity, motion sensors, camera, vibration motor, USB port and a lot more. Simply put, on the hardware front, TestM analyses every component and is compatible with more than 14, Android devices.

But that is not all, apart from testing, TesM also offers diagnostic services. You can run a range of troubleshooting steps to repair the issues you are having on your smartphone.

It also gives you a hardware diagnostic report so you can provide the information to repair shops for a better understanding of the issue.

All in all, TestM Hardware is a pretty good app and brings multiple features into one app— from hardware testing to diagnostic service— and you can surely rely on this app.

The app is also designed quite well in the material design language and seems quite straightforward. It offers almost 30 tests for various hardware components and sensors.

However, Test your Android goes one step further from testing and brings a diagnostic mode to fix the dead pixels on the screen.

While the developer does not guarantee the fix, users have reported that it works quite well. On top of it, there are few utilities too like barcode scanner and sound meter which can help you in some situations.

So to put it straight, Test your Android app is among the best apps to test hardware with versatile features and you can definitely give it a shot.

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Talking about the range of tests, the app allows you to examine Bluetooth, GPS, Microphone, proximity sensor, battery, touch display sensitivity, and many other hardware elements.

Other than that, the app gives you information like processor count, CPU and RAM usage, temperatur e and other device-related information.

To conclude, Test My Device is a simple and quick app for testing hardware on Android devices and if other apps are unable to find the defective component then you can give Test My Device a try.

Yes, the process takes quite a bit to finish, but the results are pretty promising. If you are looking for an app that can test the display hardware on Android, this is the app to get.

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Android App Test Video

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Android App Test Video

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Configure devices. Interact with peripherals. Build user-space drivers. Manage devices. Create a build. Push an update. Chrome OS devices.

Core topics. Interact with other apps. Handling app links. App shortcuts. App widgets. Architecture Components. Data Binding Library. Paging Library.

Paging 3. How-To Guides. Advanced Concepts. Threading in WorkManager. Navigation component. Intents and intent filters. User interface.

Add motion to your layout with MotionLayout. MotionLayout XML reference. Improving layout performance. Custom view components. Look and feel. Add the app bar.

Control the system UI visibility. Supporting swipe-to-refresh. Pop-up messages overview. Adding search functionality. Creating backward-compatible UIs.

Media app architecture. Building an audio app. Building a video app. Routing between devices. Background tasks. Manage device awake state. Save to shared storage.

Save data in a local database. Sharing simple data. Sharing files. Sharing files with NFC. Printing files. Content providers. In your tests, the real implementation of one module can call the fake implementation of the other module.

As you create a new module, however, don't be too dogmatic about making it full-featured right away.

It's OK for a particular module to not have one or more layers of the app's stack. To learn more about how to define modules in your app, as well as platform support for creating and publishing modules, see Android App Bundles.

When setting up your environment and dependencies for creating tests in your app, follow the best practices described in this section. A typical project in Android Studio contains two directories in which you place tests.

Organize your tests as follows:. Real devices offer the highest fidelity but also take the most time to run your tests.

Simulated devices, on the other hand, provide improved test speed at the cost of lower fidelity. The platform's improvements in binary resources and realistic loopers, however, allow simulated devices to produce more realistic results.

Virtual devices offer a balance of fidelity and speed. When you use virtual devices to test, use snapshots to minimize setup time in between tests.

When creating tests, you have the option of creating real objects or test doubles , such as fake objects or mock objects. Generally, using real objects in your tests is better than using test doubles, especially when the object under test satisfies one of the following conditions:.

In particular, mocking instances of types that you don't own usually leads to brittle tests that work only when you've understood the complexities of someone else's implementation of that type.

Use such mocks only as a last resort. It's OK to mock your own objects, but keep in mind that mocks annotated using Spy provide more fidelity than mocks that stub out all functionality within a class.

However, it's better to create fake or even mock objects if your tests try to perform the following types of operations on a real object:. Tip: Check with the library authors to see if they provide any officially-supported testing infrastructures, such as fakes, that you can reliably depend on.

After you've configured your testing environment, it's time to write tests that evaluate your app's functionality. This section describes how to write small, medium, and large tests.

The Testing Pyramid, shown in Figure 2, illustrates how your app should include the three categories of tests: small, medium, and large:.

As you work up the pyramid, from small tests to large tests, each test increases in fidelity but also increases in execution time and effort to maintain and debug.

Therefore, you should write more unit tests than integration tests, and more integration tests than end-to-end tests. Although the proportion of tests for each category can vary based on your app's use cases, we generally recommend the following split among the categories: 70 percent small, 20 percent medium, and 10 percent large.

The small tests that you write should be highly-focused unit tests that exhaustively validate the functionality and contracts of each class within your app.

As you add and change methods within a particular class, create and run unit tests against them. If these tests depend on the Android framework, use a unified, device-agnostic API, such as the androidx.

This consistency allows you to run your test locally without a physical device or emulator. If your tests rely on resources , enable the includeAndroidResources option in your app's build.

Your unit tests can then access compiled versions of your resources, allowing the tests to run more quickly and accurately.

For tests that always run on a JVM-powered development machine, you can use Robolectric. Robolectric simulates the runtime for Android 4.

This functionality allows you to test code that depends on the framework without needing to use an emulator or mock objects. Robolectric supports the following aspects of the Android platform:.

You can run instrumented unit tests on a physical device or emulator. This form of testing involves significantly slower execution times than local unit tests, however, so it's best to rely on this method only when it's essential to evaluate your app's behavior against actual device hardware.

If you need a test to execute on the main thread, annotate it using UiThreadTest. In addition to testing each unit of your app by running small tests, you should validate your app's behavior from the module level.

To do so, write medium tests, which are integration tests that validate the collaboration and interaction of a group of units.

Use your app's structure and the following examples of medium tests in order of increasing scope to define the best way to represent groups of units in your app:.

Espresso helps keep tasks synchronized as you perform UI interactions similar to the following on a device or on Robolectric:.

To learn more about these interactions and how to use them in your app's tests, see the Espresso guide. Although it's important to test each class and module within your app in isolation, it's just as important to validate end-to-end workflows that guide users through multiple modules and features.

These types of tests form unavoidable bottlenecks in your code, but you can minimize this effect by validating an app that's as close to the actual, finished product as possible.

If your app is small enough, you might need only one suite of large tests to evaluate your app's functionality as a whole.

Otherwise, you should divide your large test suites by team ownership, functional verticals, or user goals.

Typically, it's better to test your app on an emulated device or a cloud-based service like Firebase Test Lab , rather than on a physical device, as you can test multiple combinations of screen sizes and hardware configurations more easily and quickly.

In addition to supporting medium-sized instrumentation tests, Espresso provides support for synchronization when completing the following tasks in large tests:.

This section describes how to use elements of AndroidX Test to further refine your app's tests. The Guava team provides a fluent assertions library called Truth.

You can use this library as an alternative to JUnit- or Hamcrest-based assertions when constructing the validation step—or then step—of your tests.

Usually, you use Truth to express that a particular object has a specific property using phrases that contain the conditions you're testing, such as the following:.

AndroidX Test supports several additional subjects for Android to make Truth-based assertions even easier to construct:. The AndroidX Test API helps you carry out common tasks related to mobile app testing, which the following sections discuss.

Espresso allows you to programmatically locate and interact with UI elements in your app in a thread-safe way.

To learn more, see the Espresso guide. The test runner facilitates loading your test package and the app under test onto a device or emulator, running your tests, and reporting the results.

To further increase these tests' reliability, use Android Test Orchestrator, which runs each UI test in its own Instrumentation sandbox.

This architecture reduces shared state between tests and isolates app crashes on a per-test basis. For more information about the benefits that Android Test Orchestrator provides as you test your app, see the Android Test Orchestrator guide.

The UI Automator API lets you interact with visible elements on a device, regardless of the activity or fragment that has focus. Caution: We recommend testing your app using UI Automator only when your app must interact with the system UI or another app to fulfill a critical use case.

Because UI Automator interacts with a particular system UI, you must re-run and fix your UI Automator tests after each platform version upgrade and after each new release of Google Play services.

As an alternative to using UI Automator, we recommend adding hermetic tests or separating your large test into a suite of small and medium tests.

In particular, focus on testing one piece of inter-app communication at a time, such as sending information to other apps and responding to intent results.

The Espresso-Intents tool can help you write these smaller tests. Your app's interface should allow all users, including those with accessibility needs, to interact with the device and complete tasks more easily in your app.

To help validate your app's accessibility, Android's testing library provides several pieces of built-in functionality, which is discussed in the following sections.

To learn more about how to validate your app's usability for different types of users, see the guide on testing your app's accessibility.

Enable accessibility checks by including the AccessibilityChecks annotation at the beginning of your test suite, as shown in the following code snippet:.

Enable accessibility checks by calling AccessibilityChecks. For more information on how to interpret the results of these accessibility checks, see the Espresso accessibility checking guide.

Use the ActivityScenario and FragmentScenario classes to test how your app's activities and fragments respond to system-level interruptions and configuration changes.

To learn more, see the guides on how to test activities and test fragments. AndroidX Test includes code for managing the lifecycles of key services.

To learn how to define these rules, see the JUnit4 Rules guide. If your app's behavior depends on the device's SDK version, use the SdkSuppress annotation, passing in values for minSdkVersion or maxSdkVersion depending on how you've branched your app's logic:.

Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app.

App resources.

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