public void testVisit() {
// given
when(cssProperty.getName()).thenReturn("font-family");
ListValue values = mock(ListValue.class);
when(values.toCss()).thenReturn("Arial, Times New Roman, Georgia,'Sans Serif', Trebuchet MS, " +
"\"Comic Sans MS\"");
when(cssProperty.getValues()).thenReturn(values);
// when
FontFamilyVisitor fontFamilyVisitor = new FontFamilyVisitor();