How to test spring controller handler response - spring

Question

I have spring controller handler. I have to test that handle by using Junit test case. I am new to Juint so not able to test Junit. I want to run this in eclipse.
spring handler:
#Controller
#RequestMapping("/core")
public class HelloController {
#RequestMapping(value = "/getEntityType", method = RequestMethod.GET)
public ResponseEntity<List<MyEnum >> getEntityType(HttpServletRequest
request, HttpServletResponse response) {
return new ResponseEntity<List<MyEnum >>(Arrays.asList(MyEnum.values()), HttpStatus.OK);
}
Enum Class:
public enum MyEnum {
FIRST, SECOND, THIRD;
}
TestCase:
#Test
public void testToFindEnumTypes() throws Exception {
MockHttpServletRequest request = new MockHttpServletRequest("GET", "core/getEntityType");
MockHttpServletResponse response = new MockHttpServletResponse();
hello.Controller.getEntityType(request, response);
Assert.assertNotNull(getResponseJSON(response));
}
Please tell me how to Run Junit Test case for that handler. I am new to Junit testing.

Answer 1

From Eclipse, there should be a green run button that allows you to run JUnit tests.
Eclipse Help has this really good article explaining how to:
https://help.eclipse.org/neon/index.jsptopic=%2Forg.eclipse.jdt.doc.user%2FgettingStarted%2Fqs-junit.htm
Also, if running outside your Eclipse, and doing it in a maven build, you need to add junit dependency to your maven pom.xml file:
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
Then run maven test command as follows:
mvn clean test
Also, there a few syntax errors in your posted code. It should be like something like this:
public class HelloControllerTest {
private HelloController helloController = new HelloController();
#Test
public void testToFindEnumTypes() throws Exception {
// setup
MockHttpServletRequest request = new MockHttpServletRequest("GET", "core/getEntityType");
MockHttpServletResponse response = new MockHttpServletResponse();
// execution
ResponseEntity actualResponse = helloController.getEntityType(request, response);
// verify
assertNotNull(actualResponse);
assertEquals(HttpStatus.OK, actualResponse.getStatusCode());
List<MyEnum> myEnumList = (List<MyEnum>) actualResponse.getBody();
assertTrue(myEnumList.contains(MyEnum.FIRST));
assertTrue(myEnumList.contains(MyEnum.SECOND));
assertTrue(myEnumList.contains(MyEnum.THIRD));
}
Ideally, you should also verify correctly all the return values like i done in the example above.