@Test
	public void toGraphBlank() {
		js = parse("");
		Graph g = js.toGraph();
		assertEquals(toExpectedGraph("n:0:START,n:1:END,l:0:1"), g.toJSON());
		js = parse(" ");
		g = js.toGraph();
		assertEquals(toExpectedGraph("n:0:START,n:1:END,l:0:1"), g.toJSON());
	}
Parse job specifications and verify either the correct abstract syntax tree is produced or the current exception comes out.
The parser does no semantic validation, it is purely syntax checking.

@author Andy Clement
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/job/dsl/JobParserTests.java