Testing Guidelines

General

• Tests should not be public

• Instance variables should have no modifiers

• Constants have to be private static final

• If tests throw any exception, they must throw Exception.class only

• Testclass name pattern:

  • rest: Start with the name of the tested class or description of the tested behavior, end with “IntTest” or “RestDocTest”, e.g. TaskControllerIntTest

  • lib: Start with the name of the tested class or description of the tested behavior, end with “AccTest”, e.g. UpdateTaskAccTest

• Assertions

  • We are using AssertJ only

  • Concatenate the assertions if possible

  • We are strictly using the AssertJ fluent syntax. This means assertThat(<testObject>).<operation>
    examples:
    BAD: assertThat(string.contains(“foo”)).isTrue();
    GOOD: assertThat(string).contains(“foo”);
    General Rule: Do not use any operation within the assertThat() function. Use existing functions from AssertJ’s assert classes.

  • We want to use extracting instead of explicit extracting for collection-type entities.

    • e.g.

      assertThat(events)
          .extracting(WorkbasketHistoryEvent::getEventType)
          .containsExactly(WorkbasketHistoryEventType.DISTRIBUTION_TARGET_ADDED.getName());

      instead of

      type = events.get(0).getEventType();
      assertThat(type).isEqualTo(WorkbasketHistoryEventType.DISTRIBUTION_TARGET_ADDED.getName());

Unit Tests

• Test name pattern: should_ExpectedBehavior_When_StateUnderTest or should_ExpectedBehavior_For_Situation
  In case it is not possible to name the test with “when” or “for”, it is okay to write should_ExpectedBehaviour. The most important thing is that the name is as understandable as possible.

Rest Tests

• Url and HttpEntity should be extracted. The variables should be named url and auth:

  String url = restHelper.toUrl(RestEndpoints.URL_ACCESS_ID)
                  + "?search-for=cn=ksc-users,cn=groups,OU=Test,O=TASKANA";
  HttpEntity<?> auth = restHelper.defaultRequest();
  
  ResponseEntity<List<AccessIdRepresentationModel>> response =
          TEMPLATE.exchange(
              url,
              HttpMethod.GET,
              auth,
              ACCESS_ID_LIST_TYPE);

• When testing our REST Service, we always use an ObjectMapper instance to convert an Object to a JSON representation. We NEVER create JSON Strings manually.