sc.addStatement(uriA, uriB, uriC, uriA);
sc.addStatement(uriC, uriA, uriB, uriA);
sc.addStatement(uriB, uriC, uriA, uriA);
assertEquals(3L, sc.size(uriA));
sc.addStatement(uriA, uriB, uriC, uriB);
sc.addStatement(uriB, uriC, uriA, uriB);
assertEquals(2L, sc.size(uriB));
sc.addStatement(uriA, uriB, uriC);
assertEquals(1L, sc.size((Resource) null));
sc.addStatement(uriA, uriB, uriC, uriC);
sc.addStatement(uriB, uriC, uriA, uriC);