@Test
	public void twoModules() {
		StreamNode ast = parse("foo | bar");
		assertEquals("[(ModuleNode:foo:0>3)(ModuleNode:bar:6>9)]", ast.stringify(true));
	}
Parse streams and verify either the correct abstract syntax tree is produced or the current exception comes out.

@author Andy Clement
@author David Turanski
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/stream/dsl/StreamConfigParserTests.java