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For example: ./gradlew -DintegrationTest.single=ArrayUtilsJUnitTest integrationTest
To run a specific category of tests (eg: GfshTest) you can do so:
./gradlew -PtestCategory=org.apache.geode.test.junit.categories.GfshTest distributedTest
Setting up your IDE
Geode uses gradle plugins to generate your IDE configuration files.
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