Reproduction of Salesforce code coverage bug.

TestA.cls

public class TestA {
  public TestA()
	{
		
	}
    public class TestB 
    {
    	public Integer doSomething()
    	{
        	Integer x = 1;
        	Integer y = x;
        	return y;    		
    	}
    	public Integer doSomethingElse()
    	{
        	Integer a = 1;
        	Integer b = a * 2;
        	return a;    		
    	}
    }	
}

TestATest.cls

@IsTest
private with sharing class TestATest {
  
	private static testmethod void testMe()
	{
      // Uncomment the line below to work around the lack of code coverage bug
		  // TestA testAObj = new TestA();
    	TestA.TestB testBObj = new TestA.TestB();
    	System.assertEquals(1, testBObj.doSomething());
	}
}