	@Test
	public void testIsPlaceholder() throws Exception {

		assertTrue(strategy.isPlaceholder("{}", 0));
		assertFalse(strategy.isPlaceholder("{", 0));
		assertFalse(strategy.isPlaceholder(" {}", 0));
		assertFalse(strategy.isPlaceholder(" {} ", 3));
		assertFalse(strategy.isPlaceholder("{}", 1));
		assertFalse("not a string placeholder", strategy.isPlaceholder("%s", 0));
	}