How much of the power drawn by a chip turns into heat? 1. Not the answer you're looking for? Extending IC sheaves across smooth normal crossing divisors. And if you wanna learn more about its testing you can check it here. You can derive from MockContext and return for example a MockResources on getResources(), a valid ContentResolver on getContentResolver(), etc. What happens if you've already found the item an old map leads to? So what's the difference between these contexts? Then, it applies some stimulus to the system under test, usually by calling a method on it. Is it possible to design a compact antenna for detecting the presence of 50 Hz mains voltage at very short range? Your Update 3 made my first test work, but the second test in the class still failed. If this is in an instrumented test, then Robolectric is not needed. Can the use of flaps reduce the steady-state turn radius at a given airspeed and angle of bank? Recovery on an ancient version of my TexStudio file. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In my android application I have a constructor that uses: The activity is passed into the constructor as a parameter. Then you are trying to use its applicationContext however you did not mock it. But Why? 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. The class that I want to test is a POJO class. ApplicationProvider.getApplicationContext(). 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. Sound for when duct tape is being pulled off of a roll. This is just to confirm that example works, otherwise there would be the same problem as in your case . 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? Now I got the problem that I need a context to create my SQLiteBridge. You can go for getApplicationContext() if you wanna get context of whole application. Ok, this issue is resolved. The Spring ApplicationContext | Baeldung Can I trust my bikes frame after I was hit by a car if there's no visible cracking? Get context of test project in Android junit test case Asking for help, clarification, or responding to other answers. You can bypass the @hide annotation using reflection. You can have just one constructor that takes a Context, you don't really need two. How to access both test and application Context in an Android test? This way I do not have to implement all those test that are not worth the time according to my point of view. How to write unit test of app based on Android Architecture - Medium To learn more, see our tips on writing great answers. Is it OK to pray any five decades of the Rosary or do they have to be in the specific set of mysteries? This might be a simple question but I just wanted to make sure I am right. Why are mountain bike tires rated for so much lower pressure than road bikes? 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. How to get the activity or application context in AndroidTestCase, Getting a Context for use in AndroidTestCase when class under test is not an activity. Why is Bb8 better than Bc7 in this position? You need to write your test in androidTest package. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. Is Spider-Man the only Marvel character that has been represented as multiple non-human characters? So I created my test class like below. I don't see why. unit testing - Android mocking applicationcontext inside application Diagonalizing selfadjoint operator on core domain. InstrumentationRegistry.getContext () - provides the Context of this Instrumentation's package. Return the context of the single, global Application object of the current process. You need to mock it as well: Assume 1) your test is instrumentation test 2) you are using subclass of Application - say, MyApplication. JUnit: How to get context on a non activity testCase? Hence my dilemma. and here the build.gradle for the project: EDIT: My tests all worked before upgrading to AS 1.1.0 and ran on a device / emulator. If you are willing to change to Room instead of using SQLite directly, its testing is well documented. val app = InstrumentationRegistry.getInstrumentation ().targetContext.applicationContext as Application val model = YourModel (app) // now run tests with model. Assume 1) your test is instrumentation test 2) you are using subclass of Application - say, MyApplication. This can be achieved by using a Fake. tx (note there is a typo in your class member). Id be interested as to which approach is the better practice here. rev2023.6.2.43474. But I was not sure, is it the best practice to achieve this? I need this to load some files from assets from the test project. Always use this.getInstrumentation().getTargetContext() to access the context of the application. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. But I get a class cast exception and the trace points to this: this.getInstrumentation().getTargetContext() is supposed to return an object of type context. Why do I get different sorting for the same query on the same data in two identical MariaDB instances? Should convert 'k' and 't' sounds to 'g' and 'd' sounds when they follow 's' in a word for pronunciation? What to test on Android applications Your test should focus on the business logic of your application. If you attempt to inject a Uri and add properties to it in your unit test, you'll be in for a hair-pulling session. Should convert 'k' and 't' sounds to 'g' and 'd' sounds when they follow 's' in a word for pronunciation? 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. First, the unit test initializes a small piece of an application it wants to test. 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 there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Application is always initialized first whether your process runs, whether it's an activity, a service, or something else. rev2023.6.2.43474. The easiest way to get the application context is: Create a class App that extends android.app.Application. While new Activity() of course gives me a Context, I can not access my resources (Strings, Assets) from it unfortunately. 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? 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. We will download the following plugin, unity and get our newsletter and registered trademarks and click on the spring boot test application context in unit testing where individual components. Can you speculate as to why they made it hidden? Living room light switches do not work during warm/hot weather. How can I manually analyse this simple BJT circuit? If I make a second constructor which accepts the Service as a parameter and uses service.getApplicationContext? Here are newer examples, I took your examples and tested them in my own temporary test project. Can I trust my bikes frame after I was hit by a car if there's no visible cracking? After a bit of digging I found: this.getInstrumentation().getTargetContext() and then cast it to the type of my Application extended class. AndroidTestCase is now deprecated, and it is recommended to use InstrumentationRegistry instead. Other methods are already deprecated. Indian Constitution - What is the Genesis of this statement? " Get context of test project in Android junit test case, How to get the activity or application context in AndroidTestCase, Getting a Context for use in AndroidTestCase when class under test is not an activity. I am pretty sure that you cannot test SQLite with robolectric. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. jUnit 4 (and perhaps other versions of jUnit) and androidx use: Thanks for contributing an answer to Stack Overflow! VS "I don't like it raining.". It worked when I left the call to getApplicationContext() out.. Paper leaked during peer review - what are my options? ditto on needing a more complete example. MockContext | Android Developers Asking for help, clarification, or responding to other answers. Thanks for contributing an answer to Stack Overflow! Android: how to get Context when testing with ActivityInstrumentationTestCase2? 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. Why is the returned context from getInstrumentation().getTargetContext() different than getActivity().getApplicationContext()? To do the testing I need to create a Database version that gets built in memory. I have a similar issue and isn't the whole point of "AndroidTestCase" to be able to test an activity-less class/project? kotlin - Room database error when unit testing, Android database testing - using Room.inMemoryDatabaseBuilder() passes exact same test that Room.databaseBuilder() does not. I am trying to do an unit test for an android app and I need to get a string from res.string resources. Is there any evidence suggesting or refuting that Russian officials knowingly lied that Russia was not going to attack Ukraine? Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. Why doesnt SpaceX sell Raptor engines commercially? :). SQLiteBridge provides DAOs for every child class of Model. Get Application Context In Unit Test Android - sjtechsupport.com Asking for help, clarification, or responding to other answers. But, if you look a the source code of AndroidTestCase, it looks like you need to set a Context yourself: Source: http://alvinalexander.com/java/jwarehouse/android/core/java/android/test/AndroidTestCase.java.shtml, With the Android Testing Support Library, you can. Does the policy change for AI-generated content affect users who (want to) getting null pointer exception for android database testcase. Does the grammatical context of 1 Chronicles 29:10 allow for it to be declaring that God is our Father? You can call the static method for the Context: More details can be found here: JUnit: How to get context on a non activity testCase? Does the policy change for AI-generated content affect users who (want to) How to run a Junit5 test with Android dependencies and robolectric, Room test database implementation not found. Use the testImplementation function to indicate that they apply to the local test source set, and not the application: dependencies { // Required -- JUnit 4 framework testImplementation "junit:junit:$jUnitVersion" Those would be for system tests: It's a lot slower to run. AndroidTestCase Class Overview The problem is that I cannot get the context or the activity, is possible? - Android, Android Unit Test ViewModel Wanted but not invoked. Android JUnit4 Testing - Where to get Context from? Thanks for contributing an answer to Stack Overflow! Is it OK to pray any five decades of the Rosary or do they have to be in the specific set of mysteries? Is there a faster algorithm for max(ctz(x), ctz(y))? Be is displaying a toast or Accessing database, you use. Benefits of testing. Is it possible to type a single quote/paren/etc. Why in a test class that extends AndroidTestCase, does getContext() return null? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. To learn more, see our tips on writing great answers. when you have Vim mapped to always print two? 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. For AndroidX use InstrumentationRegistry.getInstrumentation().getTargetContext() or InstrumentationRegistry.getInstrumentation().getContext(). 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. Semantics of the `:` (colon) function in Bash when used in a pipe? Asking for help, clarification, or responding to other answers. InstrumentationRegistry can be used as in Joe Birch's sample. I believe this is because the context returned by getContext() points to the instrumentation's context rather than that of your application / unit test. Calling getActivity() essentially calls the OnCreate() method which fails and thus generates a Null Pointer Exception. How can I get context of test application itself in ApplicationTestCase