How can I add a Java system property during JUnit Test Execution

user_13892 0
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I need to define a system property for my JUnit tests. I've tried various steps to pass the name/value pair into gradle. (I've tried Milestone-3 and 4). None of these approaches worked:

  • defining a systemProp.foo=bar in the gradle.properties file
  • passing -Dfoo=bar at the command line
  • passing -PsystemProp.foo=bar on the command line

I don't see the additional properties from "gradle properties" though I'm not sure I should. But more importantly, I dumped the System.properties in a static initializer and the property is not there. I need to pass System properties to the running tests to tell them what environment (local, Jenkins, etc) they are running in.

gradle junit
3 Answers

with android, you can use

android {
  ...
  testOptions {
    ...
    // Encapsulates options for local unit tests.
    unitTests {
      // By default, local unit tests throw an exception any time the code you are testing tries to access
      // Android platform APIs (unless you mock Android dependencies yourself or with a testing
      // framework like Mockito). However, you can enable the following property so that the test
      // returns either null or zero when accessing platform APIs, rather than throwing an exception.
      returnDefaultValues true

      // Encapsulates options for controlling how Gradle executes local unit tests. For a list
      // of all the options you can specify, read Gradle's reference documentation.
      all {
        // Sets JVM argument(s) for the test JVM(s).
        jvmArgs '-XX:MaxPermSize=256m'

        // You can also check the task name to apply options to only the tests you specify.
        if (it.name == 'testDebugUnitTest') {
          systemProperty 'debug', 'true'
        }
        ...
      }
    }
  }
}
user_60937050
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