I was receiving an error when trying to make calls to SQLite using @taynguyen answer, so instead of: InstrumentationRegistry.getTargetContext(). That allows, with some pain, some unit tests. So I created my test class like below. Use InstrumentationRegistry instead. How to access both test and application Context in an Android test? The class that I want to test is a POJO class. Extending IC sheaves across smooth normal crossing divisors. How to get the context from Unit Test in android - Stack Overflow Asking for help, clarification, or responding to other answers. Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I created there context for prefname and prefmode in shared preference, How to get the context from Unit Test in android, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. Should convert 'k' and 't' sounds to 'g' and 'd' sounds when they follow 's' in a word for pronunciation? rather than "Gaudeamus igitur, *dum iuvenes* sumus!"? There is only one application context, so you should get the same one. Could entrained air be used to increase rocket efficiency, like a bypass fan? Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? First story of aliens pretending to be humans especially a "human" family (like Coneheads) that is trying to fit in, maybe for a long time? You can derive from MockContext and return for example a MockResources on getResources(), a valid ContentResolver on getContentResolver(), etc. To learn more, see our tips on writing great answers. I need this to load some files from assets from the test project. Point out the problem with this code. Calling getActivity() essentially calls the OnCreate() method which fails and thus generates a Null Pointer Exception. Edit: You will always have access to the application context. The "this" Keyword. Am also extending the test suite class with the ActivityInstrumentationTestCase2 class. Is there any evidence suggesting or refuting that Russian officials knowingly lied that Russia was not going to attack Ukraine? After hours of searching. Android JUnit4 Testing - Where to get Context from? Not the answer you're looking for? But I was not sure, is it the best practice to achieve this? Does the policy change for AI-generated content affect users who (want to) Get context of test project in Android junit test case, Accessing resources in an android test project, Unit testing on Android Studio: "not mocked" error, Android Studio Unit test SQLiteDataBase is null. How to access resources in Android Unittest? I have adapted yuku's answer with a non static direct context reference. This might be a simple question but I just wanted to make sure I am right. To learn more, see our tips on writing great answers. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Rationale for sending manned mission to another star? Room Local Unit Test - Query PagedList from DataSource.Factory, Android Unit test with Room database error, Theoretical Approaches to crack large files encrypted with AES. Asking for help, clarification, or responding to other answers. This is the function that I have to test: It crash when try to do context.getResources().getString(R.string.sInicialLunes)). InstrumentationRegistry cannot be resolved as a symbol. https://developer.android.com/training/testing/integration-testing/index.html. To learn more, see our tips on writing great answers. The alternative is to run for example Robolectric which simulates a whole Android OS. Lilypond (v2.24) macro delivers unexpected results, Solana SMS 500 Error: Unable to resolve module with Metaplex SDK and Project Serum Anchor. If the way I have grasped the concept of unit testing please point it out. What's the purpose of a convex saw blade? Making statements based on opinion; back them up with references or personal experience. Insufficient travel insurance to cover the massive medical expenses for a visitor to US? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Note: The test is NOT instrumentation test. Next step would be to create subclass of AndroidJUnitRunner, may be like this: Finally, you need to tell android to use this runner: As a result of the above, application context will be instance of TestMyApplication across your instrumentation tests. Why are mountain bike tires rated for so much lower pressure than road bikes? Thanks for contributing an answer to Stack Overflow! Are all constructible from below sets parameter free definable? Now I got the problem that I need a context to create my SQLiteBridge. AndroidTestCase Class Overview From looking at the docs, it seems like it should be able to provide you with a valid Context to pass to SQLiteOpenHelper. How can we access context of an application in Robolectric? I am trying to do an unit test for an android app and I need to get a string from res.string resources. I've tried this and it works, but the prefix is being ignored and thus the "real" database is being used in the test. Extend this if you need to access Resources or other things that depend on Activity Context. What if the numbers and words I wrote on my check don't match? Uri objects do not function in a unit test, even though they behave fine when running your app . . What happens if you've already found the item an old map leads to? What does "Welcome to SeaWorld, kid!" I am writing my first Android database backend and I'm struggling to unit test the creation of my database. @tintomathew, for MockK see my answer below. This is just to confirm that example works, otherwise there would be the same problem as in your case . Semantics of the `:` (colon) function in Bash when used in a pipe? First story of aliens pretending to be humans especially a "human" family (like Coneheads) that is trying to fit in, maybe for a long time? Thanks for contributing an answer to Stack Overflow! You need to write your test in androidTest package. InstrumentationTestCaseTest to test Context and Assertions. Is there a way to get the current processes context from a library using some global object accessable in any process from a library so I can call context.getClassLoader()? Making statements based on opinion; back them up with references or personal experience. Nope, they didn't, failed exactly the same as mine. :|, This is not so simple or maybe things have changed: I found out that this.getInstrumentation().getTargetContext() returns exactly my application context (I know this for sure because I have custom "MyApplication" class) AND .getApplicationContext() returns null. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. Diagonalizing selfadjoint operator on core domain. I have following lines in my Source code :- . Paper leaked during peer review - what are my options? What maths knowledge is required for a lab-based (molecular and cell biology) PhD? With all this done, you can now import hypersoft.systems.android.Starbox, and in your code you can get the ApplicationContext by calling Starbox.instance.getApplicationContext(). The problem is that I am calling this class from a Service. Return the context of the single, global Application object of the current process. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. You sure have earned the bounty, thanks for your effort! Are all constructible from below sets parameter free definable? Can I trust my bikes frame after I was hit by a car if there's no visible cracking? Two attempts of an if with an "and" are failing: if [ ] -a [ ] , if [[ && ]] Why? mean? Can the use of flaps reduce the steady-state turn radius at a given airspeed and angle of bank? Extending IC sheaves across smooth normal crossing divisors, "I don't like it when it is rainy." Getting context in AndroidTestCase or InstrumentationTestCase in Android Studio's Unit Test feature. Theoretical Approaches to crack large files encrypted with AES. Not the answer you're looking for? Keep in mind we need some of the following, the test is androidTest and not unit. Can I trust my bikes frame after I was hit by a car if there's no visible cracking? Is "different coloured socks" not correct? Theoretical Approaches to crack large files encrypted with AES. Why is Bb8 better than Bc7 in this position? Doubt in Arnold's "Mathematical Methods of Classical Mechanics", Chapter 2. Built-in use with JUnit 4 and AndroidX library. Can I also say: 'ich tut mir leid' instead of 'es tut mir leid'? Does the policy change for AI-generated content affect users who (want to) how can I mock the Context using Mockito and Robolectric? What is pressure energy in a closed system? Now, modify your AndroidManifest.xml tag to have the attribute android:name="hypersoft.systems.android.Starbox", and be sure the Starbox.java class file is located in the project component directory: android rather than starbox. because java.lang.NullPointerException. In Android there are two types of unit tests: Instrumented: they are slow, only run on a real device or an emulator and live in the app/src/androidTest folder by default Local or. Recovery on an ancient version of my TexStudio file. What are some ways to check if a molecular simulation is running properly? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. JUnit: How to get context on a non activity testCase? Find centralized, trusted content and collaborate around the technologies you use most. mean? For AndroidX use InstrumentationRegistry.getInstrumentation().getTargetContext() or InstrumentationRegistry.getInstrumentation().getContext(). What's the purpose of a convex saw blade? rev2023.6.2.43474. Or change any config to test your function. The problem is that I cannot get the context or the activity, is possible? Injecting in Tests | Koin Insufficient travel insurance to cover the massive medical expenses for a visitor to US? AppSearchException; android.app.appsearch.observer. What's the purpose of a convex saw blade? Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary? Semantics of the `:` (colon) function in Bash when used in a pipe? Is it OK to pray any five decades of the Rosary or do they have to be in the specific set of mysteries? What happens if you've already found the item an old map leads to? A good rule of thumb is to have the following distribution of tests: 70-80 % unit tests to ensure stability of your code basis 20-30 % functional tests to ensure that the application really works Connect and share knowledge within a single location that is structured and easy to search. How can I populate the context before an activity is started and have it available to that Activity? rev2023.6.2.43474. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Is there a place where adultery is a crime? Here is the complete solution: Update: AndroidTestCase This class was deprecated in API level 24. Different ways to get Context in Android | by Susheel karam - Medium Did an AI-enabled drone attack the human operator in a simulation environment? When running gradlew testDebug the tests are run, but all of the tests that require a Context fail because getContext (AndroidTestCase) / getInstrumentation.getContext () (InstrumentationTestCase) both return null. When mocking object, you have to mock all interactions this mock has (it's methods too). Is it possible to design a compact antenna for detecting the presence of 50 Hz mains voltage at very short range? How much of the power drawn by a chip turns into heat? Is Spider-Man the only Marvel character that has been represented as multiple non-human characters? androidx.test.InstrumentationRegistry is deprecated. How to access both test and application Context in an Android test? I tried out 4 options that are mentioned here How can we access context of an application in Robolectric? android - Getting the Application Context - Stack Overflow Finally, it observes the resulting behavior. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Is there a faster algorithm for max(ctz(x), ctz(y))? rev2023.6.2.43474. The use case is, having a json file we can reference vs hard coding the json string into the class we are unit testing. android.app.appsearch.exceptions. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Is "different coloured socks" not correct? I think I will use Robolectric .. but thanks for this solution! How to read resource file from unit test? What's the difference between getTargetContext() and getContext (on InstrumentationRegistry)? In kotlin val context = InstrumentationRegistry.getInstrumentation().context worked for me. Unit Testing in Android using Mockito therebootedcoder Read Discuss Most classes have dependencies, and methods frequently delegate work to other methods in other classes, which we refer to as class dependencies. Getting context in AndroidTestCase or InstrumentationTestCase in Android Studio's Unit Test feature, Doubt in Arnold's "Mathematical Methods of Classical Mechanics", Chapter 2. Yes but it seems silly that Android does not provide access to the test project context in simple JUnit tests. Insufficient travel insurance to cover the massive medical expenses for a visitor to US? Here is a recent way to setup (unit) instrumentation tests. And if you wanna learn more about its testing you can check it here. So my code which retrieves application context adapts for this case also, see, I need application and with your code i get this error: android.app.ContextImpl cannot be cast to android.app.Application, Accessing application context from TestSuite in Setup() before calling getActivity(), github.com/andstatus/andstatus/blob/master/src/org/andstatus/, https://developer.android.com/training/testing/integration-testing/index.html, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Or if you wanted to make sure that you are getting the application context, and not, say, an activity one, you can have your constructor take Application as a parameter which is a Context. See: Build local unit tests > Include framework dependencies - Android documentation, See: How to add Java 9 to Android Studio? The class network component is injected by using dagger needs the context parameter to check connection, this is my view model: The application.applicationContext always returns null which then returns IllegalStateException. Context is a very big object, therefore you must look for what is done with it. In line SessionManager.java:41 you are doing something with a Context that is forbidden by Mockito. What to test on Android applications Your test should focus on the business logic of your application. Is it possible to design a compact antenna for detecting the presence of 50 Hz mains voltage at very short range? How do you get hold of an Android Context for a Junit test from a Java Project? val app = InstrumentationRegistry.getInstrumentation ().targetContext.applicationContext as Application val model = YourModel (app) // now run tests with model. How to get Context for Unit Test ~ AndroidBugFix @birdy how can I use this together with JUnit5? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find centralized, trusted content and collaborate around the technologies you use most. This is the problem with unit tests. In my android application I have a constructor that uses: The activity is passed into the constructor as a parameter. Doubt in Arnold's "Mathematical Methods of Classical Mechanics", Chapter 2, Or change any config to test your function. The roles ChatGPT uses are: System: The system message provides the initial context and guidance for the model. While new Activity() of course gives me a Context, I can not access my resources (Strings, Assets) from it unfortunately. Yes I did, did not work. Is there a way to get a Context object in a class extending TestCase? Benefits of testing. However if you call InstrumentationRegistry.getContext() directly you may get an exception opening your database. How to unit test a class that uses context? Other methods are already deprecated. SQLiteBridge creates and handles a SQLite database on the system.. My setup is like here (so I'm using Junit4 [thanks god]): Currently the problem I am encountering is obtaining a valid Context object to pass to my implementation of SQLiteOpenHelper. Because I cant see an upside to reveal the whole application object to the whole project when all one needs and uses is the context. Why do I get different sorting for the same query on the same data in two identical MariaDB instances? How strong is a strong tie splice to weight placed in it from above? 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. I want to separate this function and other functions that gonna come in the future and test in this class. Making statements based on opinion; back them up with references or personal experience. rather than "Gaudeamus igitur, *dum iuvenes* sumus!"? How to get Context for Unit Test February 07, 2022 android, android-testing, java No comments Issue I'm trying to pass the context into a constructor for a unit test. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I ended up extending my viewholder class which receives context object as parameter, which I mocked inside my test class (@mock lateinit var context context). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can you identify this fighter from the silhouette? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I just tried it and it worked! how did you come to this idea or where did you read that, many times in unit test mock classes don't really do the job because they are fake but we to test something real, ApplicationProvider.getApplicationContext(), Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. To create that database I need the Android application context. VS "I don't like it raining.". This way I do not have to implement all those test that are not worth the time according to my point of view - Asking for help, clarification, or responding to other answers. To do the testing I need to create a Database version that gets built in memory. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What is wrong with the way I try to create this Room database instance? Kotlin updated example: Full running example: https://github.com/fada21/AndroidTestContextExample. Create a class domain.company.pseudo.ApplicationName which extends android.app.Application. Android ApplicationTestCase using a MockContext, Getting a Context for use in AndroidTestCase when class under test is not an activity. What fortifications would autotrophic zoophytes construct? Would you mind telling me what the mistake is and why I can't get any context with Roblectric? This is the problem with unit tests. If you want to get the context with Kotlin and Mockito, you can do it in the following way: You can even run it on main thread using runOnMainSync. To do the testing I need to create a Database version that gets built in memory. Is it possible to type a single quote/paren/etc. These unit tests should test my class SQLiteBridge. How do I troubleshoot a zfs dataset that the server when the server can't agree if it's mounted or not? android - How to get Context in unit test to create Room database in Find centralized, trusted content and collaborate around the technologies you use most. Something's not right. What happens if you've already found the item an old map leads to? Is there any evidence suggesting or refuting that Russian officials knowingly lied that Russia was not going to attack Ukraine?