@Test
	public void sourceTapChannel2() {
		parse("mystream = http | file");
		StreamNode ast = parse("tap:stream:mystream.http > file");
		assertEquals(
				"[(tap:stream:mystream.http.0:0>24)>(ModuleNode:file:27>31)]",
				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