@Test public void testApiBoundary() { final String regex = "cascading\\.TraceTest\\.sampleApi.*"; TraceUtil.registerApiBoundary( regex ); try { Pipe pipe1 = sampleApi(); assertEqualsTrace( "sampleApi() @ cascading.TraceTest.testApiBoundary(TraceTest.java", pipe1.getTrace() ); } finally { TraceUtil.unregisterApiBoundary( regex ); } Pipe pipe2 = sampleApi(); assertEqualsTrace( "cascading.TraceTest.sampleApi(TraceTest.java", pipe2.getTrace() ); }