assertEquals("Test if symbols are equal", a, list.getSymbol(0));
assertEquals("Test if symbols are equal", a, list.getSymbol(1));
assertEquals("Test if symbols are equal", B, list.getSymbol(4));
assertEquals("Test if symbols are equal", C, list.getSymbol(6));
assertEquals("Test if indices are equal", 0, list.indexOf(a));
assertEquals("Test if indices are equal", 5, list.indexOf(c));
SymbolList list2 = new SymbolList();
list2.addSymbol(a);