We use JUnit as a test framework. We have many projects. We use gradle (version 1.12) as a build tool. To run the unit tests in parallel using gradle we use the below script in every project under test task.
maxParallelForks = Runtime.runtime.availableProcessors()
Ex:
test {
maxParallelForks = Runtime.runtime.availableProcessors()
}
We also maintain the single gradle.properties file.
Is it possible to define test.maxParallelForks = Runtime.runtime.availableProcessors() in gradle.properties file rather than defining it in each build.gradle file under test task?
Best Answer
The accepted answer above works but the Gradle documentation here suggests you use
I tried both and after testing both on a 2.3 GHz Intel Core i7 Mac Book Pro with 16GB RAM (4 cores with hyperthreading)
and
The approach suggested by Gradle documentation produced faster response times for our unit test suite: 7 minutes vs. 8 minutes (compared to the original 13 minutes). In addition my Mac CPU didn't get pegged and the fan didn't kick off.
I assume there is either contention on a shared resource - even if it is only the machine one which we are running the unit tests.