org.springframework.test.web.servlet.MockMvc has a nice fluent API to test requests and their responses.
We could use it for integration tests on the controllers (rest and "normal" ones).
Setup test class extending BaseModuleWebContextSensitiveTest (since ConcextConfiguration is needed) + add annotation WebAppConfiguration as explained here http://www.baeldung.com/spring-webappconfiguration
However on a quick try I get a FileNotFoundException since 'openmrs-module-radiology/omod/src/main/webapp/WEB-INF/view/module/legacyui/errorhandler.jsp' is missing. Obviously a jsp references files in the legacyui which are not there when running the test. Maybe the ViewResolver can be mocked so that jsps are not compiled, although it would be great to test this in its entirety.