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Yes, there are two suggested approaches:

  • Using EMC


  • Using JMockit

Using EMC

Here we are calling Arrays.sort() directly - normally that would be the problematic code within your class under test.


Code Block
// Java
public class MockArrays {
  public static void sort(Object[] a) {
    a[1] = "elk";
    a[2] = "ape";

We use a Java class here because otherwise JMockit tries to replace other GroovyObject methods (e.g. getMetaClass, invokeMethod, ...) and won't find them inside the java.util.Arrays class. Obviously, if your redefining a Groovy class, you can use another Groovy class.