@Test public void supportsPosixlyCorrectBehavior() { OptionParser parser = new OptionParser("i:j::k"); String[] arguments = { "-ibar", "-i", "junk", "xyz", "-jixnay", "foo", "-k", "blah", "--", "bah" }; OptionSet options = parser.parse(arguments); assertTrue(options.has("i")); assertTrue(options.has("j")); assertTrue(options.has("k")); assertEquals(asList("bar", "junk"), options.valuesOf("i")); assertEquals(singletonList("ixnay"), options.valuesOf("j")); assertEquals(asList("xyz", "foo", "blah", "bah"), options.nonOptionArguments()); parser.posixlyCorrect(true); options = parser.parse(arguments); assertTrue(options.has("i")); assertFalse(options.has("j")); assertFalse(options.has("k")); assertEquals(asList("bar", "junk"), options.valuesOf("i")); assertEquals(emptyList(), options.valuesOf("j")); assertEquals( asList("xyz", "-jixnay", "foo", "-k", "blah", "--", "bah"), options.nonOptionArguments()); }