"(&(" + Constants.OBJECTCLASS + "=org.knowhowlab.osgi.testing.it.testbundle.service.Echo)" +
"(testkey=testvalue))"), null);
serviceTracker2.open();
assertTrue(serviceTracker2.size() > 0);
// gets service by class and filter
Echo echo = (Echo) serviceTracker2.getService();
// asserts service method call
assertEquals("test", echo.echo("test"));
// stops bundle
bundle.stop();
// asserts that test bundle is resolved
assertEquals(Bundle.RESOLVED, bundle.getState());
// asserts that test service is unregistered