() -> buildPom("unique-repo-id/artifact-repo"),
                "Non-unique repository ids did not cause validation error");
    }

    /* MNG-4193 */
    @Test
    void testValidationErrorUponNonUniquePluginRepositoryId() throws Exception {
        assertThrows(
                ProjectBuildingException.class,
                () -> buildPom("unique-repo-id/plugin-repo"),

   *
   * @param set the set of elements to construct a power set from
   * @return the power set, as an immutable set of immutable sets
   * @throws IllegalArgumentException if {@code set} has more than 30 unique elements (causing the
   *     power set size to exceed the {@code int} range)
   * @throws NullPointerException if {@code set} is or contains {@code null}

                            errOn30,
                            Version.V20,
                            "profiles.profile.id",
                            null,
                            "must be unique but found duplicate profile with id " + profile.getId(),
                            profile);
                }

                validate30RawProfileActivation(problems, profile.getActivation(), prefix);