DelegateExecutionFake fails because no ProcessEngineConfiguration is present

[criew]

CamundaMockito.delegateExecutionFake().withVariable("myVar", Variables.objectValue(myObject").create()) fails.

java.lang.NullPointerException
at org.camunda.bpm.engine.impl.core.variable.VariableUtil.isJavaSerializationProhibited(VariableUtil.java:55)
at org.camunda.bpm.engine.impl.core.variable.VariableUtil.checkJavaSerialization(VariableUtil.java:82)
at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.setVariableLocal(AbstractVariableScope.java:334)
at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.setVariable(AbstractVariableScope.java:319)
at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.setVariable(AbstractVariableScope.java:294)
at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.setVariable(AbstractVariableScope.java:298)
at org.camunda.bpm.extension.mockito.delegate.VariableScopeFake.withVariable(VariableScopeFake.java:44)

Reason is, that a ProcessEngineConfiguration is required in the context to check, if a serialization check should be performed.

Of course we do not want to create a ProcessConfiguration and push it to the Context manually.

Simplest solution that worked well on our side is a patch in VariableScopeFake which overrides the following method:

@Override
        public void setVariableLocal(String variableName, TypedValue value,
                AbstractVariableScope sourceActivityExecution, boolean skipJavaSerializationFormatCheck) {
            super.setVariableLocal(variableName, value, sourceActivityExecution, true);
        }

This deactivates the serialization check in all cases.
Another option would be to patch AbstractVariableScope in Camunda, but seems to be unrealistic :-).