Android Instrumentation Tests Instrumentation tests are Java tests based on android.app.Instrumentation. They run on a device.
What's the difference between Android instrumentation tests and unit tests?
As of Android Studio 1.1rc there's Unit testing support and I'm wondering what's the difference between Android Instrumentation Tests and Unit tests. Unit tests are useful for testing code which doesn't call the Android API, and the Android instrumentation tests are rather integration tests to test Android API specific elements or GUI components.
What is the use of instrumentation in testing?
Instrumentation gives a handle to the application context used to poke around the application to validate test assertions, allowing you to write test cases to test applications at a much lower level than UI screen shot tests. Note that Instrumentation cannot catch UI bugs. Instrumentation Framework Classes
What is the difference between instrumentation tests and API testing?
Instrumentation tests they are also into the Junit package, but the control of the Android API is quite total because Instrumentation Tests are instantiated in the system before any application code is run, and to test you need to open the real application (emulator or a phone connected with USB).
Where can I find instrumentation test cases in Android?
Each instrumentation test case is similar to an Android application with the distinction that it starts another application. For example, have a look in the tests/Contactsdirectory. There should be a Makefile and an Android Manifest file. Tests are located in tests/Contacts/src/com/google/android/contactstests.
What is instrumentation in mobile testing?
Instrumentation is a process to prepare the application for testing or automation. Part of the instrumentation process may add "instruments" that allow the testing framework to gain access to parts of the application. Perfecto provides tools for instrumenting mobile applications for different purposes.
How do I use Android instrumentation test?
To run a test with am instrument :Build or rebuild your main application and test package.Install your test package and main application Android package files (APK files) to your current Android device or emulator.At the command line, enter: adb shell am instrument -w
What are types of Android testing?
Following types of testing are performed in order to certify an Android application: Functional Testing: ... Android UI Testing: ... Compatibility Testing: ... Interface Testing: ... Network Testing: ... Performance Testing: ... Installation Testing: ... Security Testing:More items...•
What is the difference between unit tests and instrumented tests?
Unit tests are useful for testing code which doesn't call the Android API, and the Android instrumentation tests are rather integration tests to test Android API specific elements or GUI components.
What is instrumentation testing?
Instrumented tests run on Android devices, whether physical or emulated. As such, they can take advantage of the Android framework APIs. Instrumented tests therefore provide more fidelity than local tests, though they run much more slowly.
What is instrumental testing?
Instrumented tests are tests that run on physical devices and emulators, and they can take advantage of the Android framework APIs and supporting APIs, such as AndroidX Test.
What are different types of testing?
The different types of testsUnit tests. Unit tests are very low level and close to the source of an application. ... Integration tests. ... Functional tests. ... End-to-end tests. ... Acceptance testing. ... Performance testing. ... Smoke testing.
What is Android testing strategy?
By separating the code into different layers and clearly defining borders with abstractions between them, it is possible to test parts of an Android application independently. It is even possible to completely abstract Android SDK from the application's use cases, so they could be reused for a different platform.
What is Android manual testing?
Mobile application testing is a process by which developer developed for hand held mobile devices is tested for its functionality, usability and consistency. Mobile application testing can be automated or manual type of testing.
How many types of system testing are there?
There are four levels of software testing: unit testing, integration testing, system testing and acceptance testing, all are used for the testing purpose.
What are the 3 techniques of regression testing?
The various regression testing techniques are:Retest all. This technique checks all the test cases on the current program to check its integrity. ... Regression test selection. ... Test case prioritization. ... Hybrid.
What is difference between UI and functional testing?
While unit testing tests both what an application segment does and how it does it, functional testing tests only what the application does. A functional test is not concerned with an application's internal details.
How do I make my own Android test?
Press "Sync Project with Gradle file" (at the top panel). You should see now a folder "java" (inside "androidTest") is a green color....Add a src/instrumentTest/java directory for the tests.Add a test class (extending ActivityTestCase) in the package com. ... Start a virtual device.More items...•
How do you write test cases for Android Apps?
Test cases should be written in such a way that they allow a person to test only one feature at a time. One should not overlap or complicate test cases. Cover all the positive and negative probabilities of the test outcomes. Write in simple language with exact and accurate names of forms, fields, etc.
Which package do we need to use for writing Android test cases?
You will useAndroid studio to create an Android application under a package com. tutorialspoint.
When should you use the Android test directory to store your test classes?
When should you use the androidTest directory to store your test classes?when the tests consist only of unit tests.when the number of tests to run is large(500+).when the tests need to run on your local machine.when the tests need to run on real or virtual devices.
Dependencies
These are the dependencies we will add the build.gradle file of the app module for the examples provided below.
Creating the Test class
The skeleton of a Test class for instrumented tests is very similar to the one we saw for unit tests in our second post.
Controlling data
When working with UI tests, it is advisable to isolate the presentation layer from the rest of layers, which are not really the ones being put to test**.**
How to interact with the view
The major difference between how we work a function for a unit test and how we do it for UI test comes now.
Related views
Sometimes we need to verify that a view we are going to operate on is related to another view, such as for example a Toolbar or a Dialog.
Navigation tests
This type of tests are perfectly valid for verifying that in the event of various conditions**, the app navigation performs correctly, both when going forward and when going back**.
End to End (E2E) tests
In the example we have been using, we made use of the setUp function in order to substitute the Presenter and mock the UseCase. This created a controlled scenario in which only the View and the Presenter were being tested, without involving the rest of classes and layers that take part in the actual app.
What is Instrumentation.java?
Instrumentation.javahas helper functions that send key events and strings, for example:
What is an instrumentation test runner?
The instrumentation test runner is an instrumentation that runs instrumentation test cases and injects itself into each test case. Instrumentation test cases need to be grouped together with an instrumentation test runner with the appropriate target package.
Where are Android framework tests?
Framework test cases test the Android application framework or specific Android application functionality that requires an Android runtime context. These tests can be found in //device/testsand //device/apps/AndroidTests.
What is ActivityTestCase used for?
This class can be used to write tests for a specific activity. An activity is launched in its setUp()method and finished with tearDown. If you write a test case that extends ActivityTestCase, you can write tests that access the activity using getActivity()and assume it has been set up properly.
How to run a test using am?
To run your tests, use the am instrumentcommand with your InstrumentationTestRunneras its argument. Results are printed as a result of the instrumentation. For example, the following snippet displays the output after running the framework tests with one test failing (note the unusual syntax caused by how instrumentations are run via am):
Where are tests files located?
Files are located within a testsdirectory found in the root directory:
Can you run all tests in Java?
If you prefer to explicitly state which tests comprise all of your tests, you can define a test suite and run that directly. By convention, all test packages in your system should have at least one suite called AllTests(see AllTests.java). To run all of the tests using the AllTestssuite for the api demos test app:
What is an instrumentation test?
Instrumentation tests: Instrumentation tests run on a device or an emulator. In the background, your app will be installed and then a testing app will also be installed which will control your app, launching it and running UI tests as needed. Instrumentation tests can be used to test none UI logic as well.
What is a unit test?
Unit tests are useful for testing code which doesn't call the Android API, and the Android instrumentation tests are rather integration tests to test Android API specific elements or GUI components. However if you use a framework like Robolectric or Mockito in your unit tests, you can test Android code (without the need of a device) ...
Why are unit tests used in mocks?
Unit tests isolate the component under test, and this is the reason why are often used together with Mocks frameworks as Mockito:because isolate the unit from their dependencies. Please notice what you say regarding the Android API is partially true, because there are also Instrumented Unit tests, namely Instrumentation is part of the Junit package as well, and also the classes that extend TestCase as the class AndroidTestCase is part of the Junit package but allows the use of A)Context, that you can call with getContext (), and B)Resources that are part of the Android API! Also please consider AndroidTestCase is a base class and there are several other classes quite useful that extend this class. They test specifically Loaders, ContentProviders and even Services and also them have access to the Android API. so these classes provide JUnit testing framework as well as Android-specific methods. Now with Junit4 there is the ServiceTestRule that extends directly from Object and allow you easier to test a Service, although you cannot start an Intent directly inside this class.
Why do we call local tests?
The main reason for this seems to be that you want to be able to run tests without a device or an emulator attached. Unit tests cannot test the UI for your app without mocking objects such as an Activity. Instrumentation tests:
What is Espresso test?
class-level methods) and provide basic validation that code is working as expected. Espresso tests provide basic validation that the UI is working as expected.
What is a roboelectric test?
Roboelectric allows a test style that is closer to black box testing, making the tests more effective for refactoring and allowing the tests to focus on the behavior of the application instead of the implementation of Android. You can still use a mocking framework along with Robolectric if you like.
Can you test Android code without a device?
However if you use a framework like Robolectric or Mockito in your unit tests, you can test Android code (without the need of a device) if I'm not mistaken.
Instrumentation Framework
- Classes
The following classes help glue together Instrumentationwith JUnit testing. Three additional base classes extend InstrumentationTestCase to allow you to test Activity and Providerclasses: - Understanding the am Command
The am command is a command-line interface to the ActivityManager (see http://code.google.com/android/reference/android/app/ActivityManager.html for details). amis used to start and instrument activities using the adb shell command, as shown in the snippet below:
Platform Test Suites
- This section provides an overview for various unit and functional test cases that can be executed through the instrumentation framework.
Running Tests
- Each instrumentation test case is similar to an Android application with the distinction that it starts another application. For example, have a look in the tests/Contactsdirectory. 1. There should be a Makefile and an Android Manifest file. 2. Tests are located in tests/Contacts/src/com/google/android/contactstests. 3. The Instrumentation Test Run...
Writing Tests
- When writing tests, refer to the ApiDemos tests as models (located at //device/samples/ApiDemos). This section provides an overview of the test structure with ApiDemos.
Troubleshooting
- If you run your test cases and nothing appears to happen, have a look at adb logcat. The following is a common problem: It's possible that the instrumentation apk isn't installed on your device or that the package name is incorrect in the Manifest file.