tf.setPropertyDataSource(new MethodProperty<Number>(nb, "number"));
assertEquals(490, tf.getPropertyDataSource().getValue());
assertEquals("490", tf.getValue());
Converter c1 = tf.getConverter();
tf.setPropertyDataSource(new MethodProperty<Number>(nb, "number"));
Converter c2 = tf.getConverter();
assertTrue(
"StringToInteger converter is ok for integer types and should stay even though property is changed",
c1 == c2);
assertEquals(490, tf.getPropertyDataSource().getValue());
assertEquals("490", tf.getValue());