@Test
	public void expressions_gh1_2() {
		StreamNode ast = parse("http --port=9014 | filter --expression='new Foo()' | log");
		ModuleNode mn = ast.getModule("filter");
		Properties props = mn.getArgumentsAsProperties();
		assertEquals("new Foo()", props.get("expression"));
	}
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