private VersionParserException parseInvalid(String constraint) {
        try {
            versionParser.parseVersionConstraint(constraint);
            fail("expected exception for constraint " + constraint);
            return null;
        } catch (VersionParserException e) {
            return e;
        }
    }

    @Test

    }

    @Override
    public VersionConstraint parseVersionConstraint(String constraint) {
        requireNonNull(constraint, "constraint");
        return new DefaultVersionConstraint(versionScheme, constraint);
    }

    static class DefaultVersion implements Version {
        private final VersionScheme versionScheme;

            }

            @Override
            public VersionConstraint parseVersionConstraint(String constraint) {
                throw new IllegalArgumentException("constraint not supported by this parser");
            }

            @Override
            public boolean isSnapshot(String version) {
                requireNonNull(version, "version");

    /**
     * Parses the specified version constraint specification, for example "1.0" or "[1.0,2.0)".
     * <p>
     * Shortcut for {@code getService(VersionParser.class).parseVersionConstraint(...)}.
     *
     * @param versionConstraint the version string to parse
     * @return the version constraint parsed from the given string