A tool for detecting Android flaky tests. This is considered alpha version, active development and improvements are on going and will be pushed soon. We would like to also welcome any contributions from you!

This is an implementation of the paper "Flaky Test Detection in Android via Event Order Exploration" to appear in FSE 2021.

We only provide prebuilt binary as a docker image for now. It can be installed via:

docker pull ghcr.io/androidflakytest/flakescanner
docker tag ghcr.io/androidflakytest/flakescanner ftd

Note: the container comes with adb at /usr/bin/adb that you might want to supply to FlakeScanner via --adbPath=/usr/bin/adb

This is the easiest way to build from source. With docker (tested > 18) installed, just do the following with the working directory the root of this project:

bash scripts/build-docker.bash

If the build was successful, you should have access to the docker image with tag ftd:latest

• java (> 1.8)
• sbt (ver 1.3.7 tested)
• gradle

Run command sbt to build. Instruction for using sbt can be found online.

Note: we have tested successfully with Andoird 9 (API level 28)

Run the docker container via docker run. Need to make sure the container can access the device for running the instrumented tests. If you have connected physical device or run an emulator in host, the most convenient way is to use the --net=host option to allow container to have access to them. Alternatively, you might simply want to run an emulator in the same container.

Usage: FlakeScanner [options] appName testPackage apkPath testRunnerClsPath testClassPath testMethodPath

  --adbPath <value>
  --debug
  --disable-ddm-log
  --apkInstallOpts <value>
  --deviceName <value>     Use default device if not supplied
  --max-runs <value>
  --config-from-file <value>
  --test-hang-timeout <value>
  --given-passed <value>
  --strategy <value>
  appName
  testPackage
  apkPath
  testRunnerClsPath
  testClassPath
  testMethodPath

Assuming you have the aapt2 tool comes with Android SDK 29 or later.

• appName can be found by aapt2 dump packagename APP.apk where APP.apk is the APK file contains the APP.
• testPackage can be found by aapt2 dump packagename TEST.apk where TEST.apk is the APK file contains the test-related files (APK file with name contains androidTest).

• Please work on personal branches, instead of always pushing to master
• For pushing work to master, please use PR

Xiao Liang Yu

Zhen Dong