final Expression e4 = new Expression("abc", "SUB");
final Expression e5 = new Expression("X", "SUB");
assertTrue(matcher.match(e1, e2));
assertFalse(matcher.match(e1, e3));
assertTrue(matcher.match(e1, e4));
assertFalse(matcher.match(e1, e5));
assertFalse(matcher.match(e4, e5));
final Expression e6 = new Expression("hello", "VER");
final Expression e7 = new Expression("hallo", "VER");
final Expression e8 = new Expression("hailo", "VER");