Catch block coverage with no dml/query in try block

Question

Is there a way to cover the following catch block without of course doing test.isRunning.

Try{
     Id bId = Func1();
     Schema.DescribeSObjectResult result = Obj1.SObjectType.getDescribe(); 
     pageRef = new PageReference('/' + result.getKeyPrefix()); 
     pageRef.setRedirect(true); 
}
catch{
    // blah blah blah
}

Func1:

public id Func1(){
    Id batchProcessId; 
    ClassA BatchX = new ClassA(); 
    batchProcessId = Database.executeBatch(BatchX); 
    return batchProcessId;
}

Answer 1

I think you could try some approach like this

public class ClassA{
@testVisible static Boolean raiseException{ get{ if ( raiseException == null ) raiseException = false; return raiseException; } set; }

public ClassA(
    if (raiseException)  throw SomeFakeException();
)

}

Then in test

testMethod static void coverCatchBlock() {
   ClassA.raiseException = true;

   // perform test
}