@Test
public void fromAndTo() throws Exception {
assertEquals((Integer) 1, converter.fromString("a"));
assertEquals((Integer) 2, converter.fromString("b"));
assertEquals("a", converter.toString(1));
assertEquals("b", converter.toString(2));
}
@Test(expected = IllegalArgumentException.class)
public void fromUnknownString() throws Exception {
converter.fromString("c");
}
