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How do I make fun of a method inherited from an abstract class using EasyMock?

I am struggling with EasyMock. I wrote two small classes to illustrate my problem:

public abstract class A {
    private AtomicReference<Integer> id = new AtomicReference<Integer>(null);
    public final int getId() {
        return id.get();
    }
    public final boolean setId(int id) {
        return this.id.compareAndSet(null, id);
    }
}

public class B extends A {
}

Then I move on to the testing method as follows:

public class EasyMockTester extends EasyMockSupport {
    @Test
    public void test() {
        B b = EasyMock.createStrictMock(B.class);
        EasyMock.expect(b.getId()).andReturn(100);
        replayAll();
        int id = b.getId();
        System.out.println("The ID is: " + id);
        verifyAll();
    }
}

The problem is that I want EasyMock to simply mock an instance of class B (my actual class is not empty, but instead adds more methods to the methods inherited from the abstract class). Instead, EasyMock somehow goes into class A code and starts complaining about a NullPointerException. How to make EasyMock a class layout that extends an abstract class?

When I run this test, I get the following failure trace:

java.lang.NullPointerException com.my.project.package.tests.A.getId(A.java:9)    com.my.project.package.tests.EasyMockTester.test(EasyMockTester.java:11)    sun.reflect.NativeMethodAccessorImpl.invoke0 (Native ) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    java.lang.reflect.Method.invoke(Method.java:597)    org.junit.runners.model.FrameworkMethod $1.runReflectiveCall(FrameworkMethod.java:44)    org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)    org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)    org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)    org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)    org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)    org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)    org.junit.runners.ParentRunner $3.run(ParentRunner.java:193)    org.junit.runners.ParentRunner $1.schedule(ParentRunner.java:52)    org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)    org.junit.runners.ParentRunner.access $000 (ParentRunner.java:42)    org.junit.runners.ParentRunner $2.evaluate(ParentRunner.java:184)    org.junit.runners.ParentRunner.run(ParentRunner.java:236)    org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)    org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

, Eclipse 3.6.2, JUnit 4.8.2 EasyMock 3.0.

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