Problems on Android using Jest test runner

[SMJ93]

Description

We have switched test runners from Mocha to Jest using the instruction guide here, but there seem to be a few issues:

1. Verbose is always enabled

With mocha we would add the flag for this to be enabled: --loglevel verbose

2. When running android build and test the instrumentation is never created casing an error

detox build --configuration android.emu.debug && detox test --configuration android.emu.debug

mulator stdout:
 : /Users/user/Library/Android/sdk/platform-tools/adb  devices
 List of devices attached
 emulator-5554	device
 : stdout:
 : stdout:
3: /Users/user/Library/Android/sdk/platform-tools/adb -s emulator-5554 shell input  keyevent 82
4: /Users/user/Library/Android/sdk/platform-tools/adb -s emulator-5554 shell am force-stop com.appname.dev
adb -s emulator-5554 shell am instrument -w -r -e detoxServer ws://localhost:8099 -e detoxSessionId test -e debug false com.appname.dev.test/android.support.test.runner.AndroidJUnitRunner
 25344mentation spawned, childProcess.pid:
 send: {"type":"isReady","params":{},"messageId":-1000}
android.util.AndroidException: INSTRUMENTATION_FAILED: com.appname.dev.test/android.support.test.runner.AndroidJUnitRunner
nstrumentation stderr:
nstrumeat com.android.commands.am.Instrument.run(Instrument.java:410)
nstrumeat com.android.commands.am.Am.runInstrument(Am.java:232)
nstrumeat com.android.commands.am.Am.onRun(Am.java:125)
nstrumeat com.android.internal.os.BaseCommand.run(BaseCommand.java:54)
nstrumeat com.android.commands.am.Am.main(Am.java:95)
nstrumeat com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
nstrumeat com.android.internal.os.RuntimeInit.main(RuntimeInit.java:284)
nstrumentation stderr:
nstrumentationProcess terminated due to receipt of signal null

When printing the instrumentation there is no bundle ID for the app we want to test - this used to show with mocha:

adb shell pm list instrumentation

instrumentation:com.android.emulator.smoketests/android.support.test.runner.AndroidJUnitRunner (target=com.android.emulator.smoketests)
instrumentation:com.android.smoketest.tests/com.android.smoketest.SmokeTestRunner (target=com.android.smoketest)
instrumentation:com.example.android.apis/.app.LocalSampleInstrumentation (target=com.example.android.apis)
instrumentation:org.chromium.webview_shell/.WebViewLayoutTestRunner (target=org.chromium.webview_shell)

Looking at the log in detox it doesn't seem to install the apk's onto the device before calling the .
There seems to be an issue installing both the Android app apk com.appname and the test apk com.appname.test when using Jest which then results in the following error:

Steps to Reproduce

Use Jest as the test runner instead of Mocha on Android by following this guide.

Detox, Node, Device, Xcode and macOS Versions

• Detox: 5.9.1
• Jest: 21.2.1
• Node: 8.1.0
• Device: Nexus_5_API_26
• macOS: 10.12.6

Here is the detox and jest config in the package.json

"jest": {
    "preset": "react-native",
    "setupTestFrameworkScriptFile": "./e2e/init.js"
  },

"detox": {
    "specs": "e2e",
    "runner": "jest",
    "session": {
      "server": "ws://localhost:8099",
      "sessionId": "test"
    },
    "configurations": {
      "android.emu.debug": {
        "binaryPath": "android/app/build/outputs/apk/app-dev-debug.apk",
        "build": "export ENVFILE=.env.dev && pushd android && ./gradlew assembleDevDebug assembleDevDebugAndroidTest -DtestBuildType=debug && popd",
        "type": "android.emulator",
        "name": "Nexus_5_API_26"
      },
      "android.emu.release": {
        "binaryPath": "android/app/build/outputs/apk/app-dev-release.apk",
        "build": "export ENVFILE=.env.dev && pushd android && ./gradlew assembleDevRelease assembleDevReleaseAndroidTest -DtestBuildType=release && popd",
        "type": "android.emulator",
        "name": "Nexus_5_API_26"
      }
    }
  }

[coderjonny]

Any new updates on this issue?
I'm having a similar issue trying to use Detox + Jest for Android. Seems like it just gets stuck.. Any hints in the source code where it might cause the problem ?

• node v8.9.3
• detox@6.0.4
• jest@22.0.3
• Android Emulator nexus_5x_api_27_x86
• macOS 10.13.2
• Gradle 4.1 (which seems like its causing a separate flavorDimensions issue)

Thanks

[anupamsmaurya]

@coderjonny I am trying with exact same config. Were you able to setup ReactNative+Detox+Jest for Android?

[prasanth95]

@anupamsmaurya @coderjonny @SMJ93 Any update on this issue?

[SMJ93]

@anupamsmaurya @prasanth95 yes, I was able to get it up and running on both iOS and Android with detox 6.0.2 and Jest 21.2.1.

[anupamsmaurya]

@SMJ93 For me detox is unable to create app-debug-androidTest.apk can you suggest anything on this stacloverflow post https://stackoverflow.com/questions/48148064/referenceerror-device-is-not-defined-when-using-detoxjest-in-react-native-fo

[SMJ93]

@anupamsmaurya Looks like your config may be incorrect. Do the example detox examples work for you?

This is what we have in our package.json:

     "e2e-test-android": "detox build --configuration android.emu.release && detox test --configuration android.emu.release",
    "e2e-test-android-debug": "detox build --configuration android.emu.debug && detox test --configuration android.emu.debug",
    "e2e-test-ios": "detox build --configuration ios.sim.release && detox test --configuration ios.sim.release --cleanup",
    "e2e-test-ios-debug": "detox build --configuration ios.sim.debug && detox test --configuration ios.sim.debug --cleanup"

And the following Detox config:

"detox": {
    "specs": "e2e",
    "test-runner": "jest",
    "runner-config": "./e2e/config.json",
    "session": {
      "server": "ws://localhost:8099",
      "sessionId": "devTest"
    },
    "configurations": {
      "ios.sim.debug": {
        "binaryPath": "ios/build/Build/Products/Debug-iphonesimulator/Dev.app",
        "build": "xcodebuild -workspace ios/productMobile.xcworkspace -scheme Dev -configuration Debug -sdk iphonesimulator -derivedDataPath ios/build",
        "type": "ios.simulator",
        "name": "iPhone 7 10.3"
      },
      "ios.sim.release": {
        "binaryPath": "ios/build/Build/Products/Release-iphonesimulator/Dev.app",
        "build": "xcodebuild -workspace ios/productMobile.xcworkspace -scheme Dev -configuration Release -sdk iphonesimulator -derivedDataPath ios/build",
        "type": "ios.simulator",
        "name": "iPhone 7"
      },
      "android.emu.debug": {
        "binaryPath": "android/app/build/outputs/apk/app-dev-debug.apk",
        "build": "export ENVFILE=.env.dev && pushd android && ./gradlew assembleDevDebug assembleDevDebugAndroidTest -DtestBuildType=debug && popd",
        "type": "android.emulator",
        "name": "Nexus_5X_API_26"
      },
      "android.emu.release": {
        "binaryPath": "android/app/build/outputs/apk/app-dev-release.apk",
        "build": "export ENVFILE=.env.dev && pushd android && ./gradlew assembleDevRelease assembleDevReleaseAndroidTest -DtestBuildType=release && popd",
        "type": "android.emulator",
        "name": "Nexus_5X_API_26"
      }
    }
  }

Hope this helps!