CircleCI config for Firebase Test Lab

config.yml

# Java Gradle CircleCI 2.0 configuration file
#
# Check https://circleci.com/docs/2.0/language-java/ for more details
#
version: 2
jobs:
  build:
    docker:
      # specify the version you desire here
      - image: circleci/android:api-26-alpha

      # Specify service dependencies here if necessary
      # CircleCI maintains a library of pre-built images
      # documented at https://circleci.com/docs/2.0/circleci-images/
      # - image: circleci/postgres:9.4

    working_directory: ~/repo

    environment:
      # Customize the JVM maximum heap limit
      JVM_OPTS: -Xmx3200m

    steps:
      - checkout
      - restore_cache:
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
      - run:
          name: Download Dependencies
          command: ./gradlew androidDependencies
      - save_cache:
          paths:
            - ~/.gradle
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
      - run:
          name: Run Unit Tests
          command: ./gradlew test
      - store_artifacts:
          path: app/build/reports
          destination: reports
      - store_test_results:
          path: app/build/test-results
      - run:
          name: Assemble APKs
          command: ./gradlew assembleAndroidTest assemble
      - run:
          name: Dump Google Cloud Credentials to file
          command: echo ${GOOGLE_AUTH} > ${HOME}/gcp-key.json
      - run: gcloud auth activate-service-account --key-file ${HOME}/gcp-key.json
      - run: gcloud --quiet config set project ${GOOGLE_PROJECT_ID}
      - run:
          name: Configure environment
          command: |
            echo 'export APK_PATH=`find . -path "*.apk" ! -path "*unaligned.apk" ! -path "*Test*.apk" -print -quit`' >> $BASH_ENV
            echo 'export TEST_APK_PATH=`find "." "-path" "*Test*.apk" -print -quit`' >> $BASH_ENV
      - run:
          name: Run UI Tests
          command: gcloud firebase test android run --type instrumentation --app ${APK_PATH} --test ${TEST_APK_PATH} --device model=Nexus6P,version=27,locale=en,orientation=portrait --timeout 30m
          no_output_timeout: 30m

Have you ever experienced this error?

Too long with no output (exceeded 10m0s)

Yeah, circleci will kill a job if nothing is printed for a while (default 10 mins). This is why we've got 'no_output_timeout: 30m' in the last run step of this gist. See https://circleci.com/docs/2.0/configuration-reference/#run for more info