Module org.junit.platform.commons
Package org.junit.platform.commons.support

Class ClassSupport

java.lang.Object
org.junit.platform.commons.support.ClassSupport
@API(status=MAINTAINED, since="1.1") public final class ClassSupport extends Object
ClassSupport provides static utility methods for common tasks regarding classes — for example, generating a comma-separated list of fully qualified class names for a set of supplied classes.

TestEngine and extension authors are encouraged to use these supported methods in order to align with the behavior of the JUnit Platform.

Since:
1.1
See Also:
AnnotationSupport, ModifierSupport, ReflectionSupport

  • Method Details

    • nullSafeToString

      public static String nullSafeToString​(Class<?>... classes)
      Generate a comma-separated list of fully qualified class names for the supplied classes.
      Parameters:
      classes - the classes whose names should be included in the generated string
      Returns:
      a comma-separated list of fully qualified class names, or an empty string if the supplied class array is null or empty
      See Also:
      nullSafeToString(Function, Class...)

    • nullSafeToString

      public static String nullSafeToString​(Function<? super Class<?>,​? extends String> mapper, Class<?>... classes)
      Generate a comma-separated list of mapped values for the supplied classes.

      The values are generated by the supplied mapper (e.g., Class::getName, Class::getSimpleName, etc.), unless a class reference is null in which case it will be mapped to "null".

      Parameters:
      mapper - the mapper to use; never null
      classes - the classes to map
      Returns:
      a comma-separated list of mapped values, or an empty string if the supplied class array is null or empty
      See Also:
      nullSafeToString(Class...)