AndroidX.test dependency error

Description

When adding the newest alpha releases to my project I encounter the below error, when trying to execute tests from androidTest directory:

Cannot find a version of 'androidx.test:monitor' that satisfies the version constraints: 
   Dependency path 'App:app:unspecified' --> 'androidx.test:monitor:1.1.2-alpha02'
   Constraint path 'App:app:unspecified' --> 'androidx.test:monitor:{strictly 1.1.1}' because of the following reason: debugRuntimeClasspath uses version 1.1.1
   Dependency path 'App:app:unspecified' --> 'androidx.test:runner:1.1.2-alpha02' --> 'androidx.test:monitor:1.1.2-alpha02'
   Dependency path 'App:app:unspecified' --> 'androidx.test.ext:junit-ktx:1.1.1-alpha02' --> 'androidx.test.ext:junit:1.1.1-alpha02' --> 'androidx.test:monitor:1.1.2-alpha02'
   Dependency path 'App:app:unspecified' --> 'androidx.test:core-ktx:1.1.1-alpha02' --> 'androidx.test:core:1.1.1-alpha02' --> 'androidx.test:monitor:1.1.2-alpha02'

Here are the dependencies I’m using:

...
// Versions
espresso_version = '3.2.0-alpha02'
androidx_test_runner_version = '1.1.2-alpha02'
androidx_test_rules_version = '1.1.2-alpha02'
androidx_test_monitor_version = '1.1.2-alpha02'
androidx_test_orchestrator_version = '1.1.2-alpha02'
androidx_test_ext_core_version = '1.1.1-alpha02'
androidx_test_ext_junit_version = '1.1.1-alpha02'

// Dependencies
androidTestImplementation "androidx.test:runner:$androidx_test_runner_version"
androidTestImplementation "androidx.test:rules:$androidx_test_rules_version"
androidTestImplementation "androidx.test:monitor:$androidx_test_monitor_version"
androidTestImplementation "androidx.test.ext:junit-ktx:$androidx_test_ext_junit_version"
androidTestImplementation "androidx.test:core-ktx:$androidx_test_ext_core_version"
androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_version"
...

Falling back on the stable versions removes the error:

espresso_version = '3.1.1'
androidx_test_runner_version = '1.1.1'
androidx_test_rules_version = '1.1.1'
androidx_test_monitor_version = '1.1.1'
androidx_test_orchestrator_version = '1.1.1'
androidx_test_ext_core_version = '1.1.0'
androidx_test_ext_junit_version = '1.1.0'

This issue was originally posted on the googlesamples project

@brettchabot

Is your debug app pulling in another version of androidx.test:monitor?

No, not to my knowledge. Also why is this problem only present in the alpha release and not the newest stable release?

Steps to Reproduce

1. Add the above mentioned dependencies
2. Add a testcase to androidTest directory (look below for example)
3. Execute testcase - error occurs before tests are executed

Example:

import com.example.utils.DatabaseTestRule
import com.example.utils.hasTable
import org.junit.Assert.assertTrue
import org.junit.Rule
import org.junit.Test

class MeasurementEntityTest {
    @get: Rule
    val databaseRule: DatabaseTestRule = DatabaseTestRule()

    private val tableName = "measurements"

    @Test
    fun whenDatabaseCreated_shouldMeasurementTableExist() {
        assertTrue("Table $tableName does not exist", databaseRule.appDatabase.hasTable(tableName))
    }
}

DatabaseTestRule (if relevant):

class DatabaseTestRule : TestWatcher() {
    val appDatabase = Room
            .inMemoryDatabaseBuilder(
                    ApplicationProvider.getApplicationContext(),
                    AppDatabase::class.java
            ).build()

    val measurementRepository = appDatabase.measurementRepository

    override fun starting(description: Description) {
        Timber.d("DatabaseTestRule initializing")
    }

    override fun finished(description: Description) {
        appDatabase.close()
        Timber.d("DatabaseTestRule tearing down")
    }
}

Expected Results

The test executes

Actual Results

The following error occurs:

Cannot find a version of 'androidx.test:monitor' that satisfies the version constraints: 
   Dependency path 'app:app:unspecified' --> 'androidx.test:monitor:1.2.0-alpha03'
   Constraint path 'app:app:unspecified' --> 'androidx.test:monitor:{strictly 1.1.1}' because of the following reason: debugRuntimeClasspath uses version 1.1.1
   Dependency path 'app:app:unspecified' --> 'androidx.test:runner:1.2.0-alpha03' --> 'androidx.test:monitor:1.2.0-alpha03'
   Dependency path 'app:app:unspecified' --> 'androidx.test.ext:junit-ktx:1.1.1-alpha03' --> 'androidx.test.ext:junit:1.1.1-alpha03' --> 'androidx.test:monitor:1.2.0-alpha03'
   Dependency path 'app:app:unspecified' --> 'androidx.test:core-ktx:1.2.0-alpha03' --> 'androidx.test:core:1.2.0-alpha03' --> 'androidx.test:monitor:1.2.0-alpha03'

AndroidX Test and Android OS Versions

espresso_version = '3.2.0-alpha02'
androidx_test_runner_version = '1.1.2-alpha02'
androidx_test_rules_version = '1.1.2-alpha02'
androidx_test_monitor_version = '1.1.2-alpha02'
androidx_test_orchestrator_version = '1.1.2-alpha02'
androidx_test_ext_core_version = '1.1.1-alpha02'
androidx_test_ext_junit_version = '1.1.1-alpha02'

Btw. It’s the same with newest alpha03 release

Emulator running:

Name: 7_WSVGA_Tablet_API_25
CPU/ABI: Google APIs Intel Atom (x86)
Path: /Users/tbs/.android/avd/7_WSVGA_Tablet_API_25.avd
Target: google_apis [Google APIs] (API level 25)
Skin: 600x1024
SD Card: 100 MB
fastboot.chosenSnapshotFile: 
runtime.network.speed: full
hw.accelerometer: yes
hw.device.name: 7in WSVGA (Tablet)
hw.lcd.width: 1024
hw.initialOrientation: Portrait
image.androidVersion.api: 25
tag.id: google_apis
hw.mainKeys: no
hw.camera.front: emulated
avd.ini.displayname: 7  WSVGA (Tablet) API 25
hw.gpu.mode: auto
hw.ramSize: 512
PlayStore.enabled: false
fastboot.forceColdBoot: no
hw.cpu.ncore: 2
hw.keyboard: yes
hw.sensors.proximity: yes
hw.dPad: no
hw.lcd.height: 600
vm.heapSize: 48
skin.dynamic: yes
hw.device.manufacturer: Generic
hw.gps: yes
skin.path.backup: _no_skin
hw.audioInput: yes
image.sysdir.1: system-images/android-25/google_apis/x86/
showDeviceFrame: no
hw.camera.back: emulated
AvdId: 7_WSVGA_Tablet_API_25
hw.lcd.density: 160
hw.arc: false
hw.device.hash2: MD5:886bf70516706f933c01ecec92c4cad1
fastboot.forceChosenSnapshotBoot: no
fastboot.forceFastBoot: yes
hw.trackBall: no
hw.battery: yes
hw.sdCard: yes
tag.display: Google APIs
runtime.network.latency: none
disk.dataPartition.size: 800M
hw.sensors.orientation: yes
avd.ini.encoding: UTF-8
hw.gpu.enabled: yes

Link to a public git repo demonstrating the problem:

NA

[cheskos]

Found and easy an convenient solution:

implementation ("androidx.fragment:fragment-testing:1.1.0-beta01",         
   exclude group: 'androidx.test', module: 'core'
})

[bohsen]

Just found the cause. It’s this dependency:

implementation "androidx.fragment:fragment-testing:$androidx_fragment_version"

Removing it removes the error.