Cannot Resolve Symbol Instanttaskexecutorrule

I open example code BasicRxJavaSample (from this article Room+RxJava) The main thing is there: @Rule public InstantTaskExecutorRule instantTaskExecutorRule = new InstantTaskE

Solution 1:

Replace testImplementation by androidTestImplementation. So the tests on folder androidTest can have access to the library.

dependencies {
    androidTestImplementation "androidx.arch.core:core-testing:2.1.0"
}

If you are not using androidx then use android.arch.core:core-testing:1.1.1

Solution 2:

I know it's late but I would like to add one thing to this accepted answer.

If you want to use,

@RulepublicInstantTaskExecutorRuleinstantTaskExecutorRule=newInstantTaskExecutorRule();

in your JUnit test case, i.e., in test folder then use following dependency, i.e, with testImplementation

dependencies {
testImplementation "android.arch.core:core-testing:1.0.0"
}

If you want to use InstantTaskExecutorRule for your UI or integration test cases(androidTest folder), use androidTestImplementation. that is:

androidTestImplementation "android.arch.core:core-testing:1.0.0"

And if you want to add for both, use androidTestImplementation & testImplementation that is:

androidTestImplementation "android.arch.core:core-testing:1.0.0"

testImplementation "android.arch.core:core-testing:1.0.0"

For Android-X use below dependency:

androidTestImplementation 'androidx.arch.core:core-testing:2.0.0'

OR

testImplementation 'androidx.arch.core:core-testing:2.0.0'

Solution 3:

for androidX migration, add

androidTestImplementation "androidx.arch.core:core-testing:2.0.0"

Solution 4:

Please put this two dependencies in your gradle file,

dependencies {

    // Test helpers for LiveData
    testImplementation "android.arch.core:core-testing:1.0.0"// Test helpers for Room
    testImplementation "android.arch.persistence.room:testing:1.0.0"
}

Further information please go through this link, Android Architecture components integration guide

Solution 5:

I think that there is a conflict in some of the linked libraries. I got around this, I used blockingGet() and blockingFirst().

and, in the end, I used https://developer.android.com/training/testing/junit-runner.html#using-android-test-orchestrator

androidTestUtil 'com.android.support.test:orchestrator:1.0.1'

this is what you need!