fail("expected exception for constraint " + constraint);
            return null;
        } catch (VersionParserException e) {
            return e;
        }
    }

    @Test
    void testEnumeratedVersions() throws VersionParserException {
        VersionConstraint c = versionParser.parseVersionConstraint("1.0");
        assertEquals("1.0", c.getRecommendedVersion().toString());