Program: 32
Project: 32
Buggy source:
@Test public void testDowngradeOnWiki() throws Throwable {
  getMockery().checking(new Expectations(){
{
      exactly(3).of(mockRightService).hasAccessLevel(with(equal("String_Node_Str")),with(equal("String_Node_Str")),with(equal("String_Node_Str")),with(any(XWikiContext.class)));
      will(returnValue(true));
    }
  }
);
  install(this.localXarExtensiontId2,"String_Node_Str",this.contextUser);
  getMockery().checking(new Expectations(){
{
      oneOf(mockAttachmentStore).deleteXWikiAttachment(with(new BaseMatcher<XWikiAttachment>(){
        public boolean matches(        Object arg){
          return ((XWikiAttachment)arg).getFilename().equals("String_Node_Str");
        }
        public void describeTo(        Description description){
          description.appendValue("String_Node_Str");
        }
      }
),with(any(XWikiContext.class)),with(equal(true)));
    }
  }
);
  install(this.localXarExtensiontId1,"String_Node_Str",this.contextUser);
  XWikiDocument samepage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertEquals("String_Node_Str","String_Node_Str",samepage.getVersion());
  XWikiDocument modifiedpage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertFalse("String_Node_Str",modifiedpage.isNew());
  Assert.assertEquals("String_Node_Str","String_Node_Str",modifiedpage.getContent());
  Assert.assertEquals("String_Node_Str",this.contextUser,modifiedpage.getAuthorReference());
  Assert.assertEquals("String_Node_Str","String_Node_Str",modifiedpage.getVersion());
  Assert.assertEquals("String_Node_Str",Locale.ROOT,modifiedpage.getLocale());
  BaseClass baseClass=modifiedpage.getXClass();
  Assert.assertNotNull(baseClass.getField("String_Node_Str"));
  Assert.assertEquals("String_Node_Str",baseClass.getField("String_Node_Str").getName());
  Assert.assertSame(NumberClass.class,baseClass.getField("String_Node_Str").getClass());
  XWikiAttachment attachment=modifiedpage.getAttachment("String_Node_Str");
  Assert.assertNotNull(attachment);
  Assert.assertEquals("String_Node_Str",attachment.getFilename());
  Assert.assertEquals(18,attachment.getContentSize(getContext()));
  Assert.assertEquals("String_Node_Str",IOUtils.toString(attachment.getContentInputStream(getContext())));
  XWikiDocument newPage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertTrue("String_Node_Str",newPage.isNew());
  XWikiDocument removedPage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertFalse("String_Node_Str",removedPage.isNew());
}

Fixed version (ground truth):
@Test public void testDowngradeOnWiki() throws Throwable {
  getMockery().checking(new Expectations(){
{
      exactly(3).of(mockRightService).hasAccessLevel(with(equal("String_Node_Str")),with(equal("String_Node_Str")),with(equal("String_Node_Str")),with(any(XWikiContext.class)));
      will(returnValue(true));
    }
  }
);
  install(this.localXarExtensiontId2,"String_Node_Str",this.contextUser);
  getMockery().checking(new Expectations(){
{
      oneOf(mockAttachmentStore).deleteXWikiAttachment(with(new BaseMatcher<XWikiAttachment>(){
        @Override public boolean matches(        Object arg){
          return ((XWikiAttachment)arg).getFilename().equals("String_Node_Str");
        }
        @Override public void describeTo(        Description description){
          description.appendValue("String_Node_Str");
        }
      }
),with(any(XWikiContext.class)),with(equal(true)));
    }
  }
);
  install(this.localXarExtensiontId1,"String_Node_Str",this.contextUser);
  XWikiDocument samepage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertEquals("String_Node_Str","String_Node_Str",samepage.getVersion());
  XWikiDocument modifiedpage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertFalse("String_Node_Str",modifiedpage.isNew());
  Assert.assertEquals("String_Node_Str","String_Node_Str",modifiedpage.getContent());
  Assert.assertEquals("String_Node_Str",this.contextUser,modifiedpage.getAuthorReference());
  Assert.assertEquals("String_Node_Str","String_Node_Str",modifiedpage.getVersion());
  Assert.assertEquals("String_Node_Str",Locale.ROOT,modifiedpage.getLocale());
  BaseClass baseClass=modifiedpage.getXClass();
  Assert.assertNotNull(baseClass.getField("String_Node_Str"));
  Assert.assertEquals("String_Node_Str",baseClass.getField("String_Node_Str").getName());
  Assert.assertSame(NumberClass.class,baseClass.getField("String_Node_Str").getClass());
  XWikiAttachment attachment=modifiedpage.getAttachment("String_Node_Str");
  Assert.assertNotNull(attachment);
  Assert.assertEquals("String_Node_Str",attachment.getFilename());
  Assert.assertEquals(18,attachment.getContentSize(getContext()));
  Assert.assertEquals("String_Node_Str",IOUtils.toString(attachment.getContentInputStream(getContext())));
  XWikiDocument newPage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertTrue("String_Node_Str",newPage.isNew());
  XWikiDocument removedPage=this.mockXWiki.getDocument(new DocumentReference("String_Node_Str","String_Node_Str","String_Node_Str"),getContext());
  Assert.assertFalse("String_Node_Str",removedPage.isNew());
}