@Test public void testMin() throws Exception {
		assertEquals(0, IntervalSet.COMPLETE_CHAR_SET.getMinElement());
		assertEquals(Token.EPSILON, IntervalSet.COMPLETE_CHAR_SET.or(IntervalSet.of(Token.EPSILON)).getMinElement());
		assertEquals(Token.EOF, IntervalSet.COMPLETE_CHAR_SET.or(IntervalSet.of(Token.EOF)).getMinElement());
	}
Public default constructor used by TestRig
tool-testsuite/test/org/antlr/v4/test/tool/TestIntervalSet.java