Class ClassOrderer.Random

java.lang.Object
org.junit.jupiter.api.ClassOrderer.Random
All Implemented Interfaces:
ClassOrderer
Enclosing interface:
ClassOrderer

public static class ClassOrderer.Random extends Object implements ClassOrderer
ClassOrderer that orders classes pseudo-randomly.

Custom Seed

By default, the random seed used for ordering classes is the value returned by System.nanoTime() during static initialization of this class. In order to support repeatable builds, the value of the default random seed is logged at CONFIG level. In addition, a custom seed (potentially the default seed from the previous test plan execution) may be specified via the junit.jupiter.execution.order.random.seed configuration parameter which can be supplied via the Launcher API, build tools (e.g., Gradle and Maven), a JVM system property, or the JUnit Platform configuration file (i.e., a file named junit-platform.properties in the root of the class path). Consult the User Guide for further information.

See Also:
  • Field Details

    • RANDOM_SEED_PROPERTY_NAME

      public static final String RANDOM_SEED_PROPERTY_NAME
      Property name used to set the random seed used by this ClassOrderer: "junit.jupiter.execution.order.random.seed"

      The same property is used by MethodOrderer.Random for consistency between the two random orderers.

      Supported Values

      Supported values include any string that can be converted to a Long via Long.valueOf(String).

      If not specified or if the specified value cannot be converted to a Long, the default random seed will be used (see the class-level Javadoc for details).

      See Also:
  • Constructor Details

    • Random

      public Random()
  • Method Details