/**
 * Version constraint for dependency. Constraint is either a range ("[1,2)") or recommended version ("1.0").
 *
 * @since 4.0.0
 */
@Experimental
public interface VersionConstraint {
    /**
     * Returns the range of this constraint, or {@code null} if none.
     * <p>
     * Note: only one, this method or {@link #getRecommendedVersion()} method must return non-{@code null} value.
     */

 * </ul>
 * </li>
 * </ul>
 *
 * @since 4.4
 */
@UsedByScanPlugin
@HasInternalProtocol
public interface VersionConstraint extends Describable {
    /**
     * The branch to select versions from. When not {@code null} selects only those versions that were built from the specified branch.
     *
     * @since 4.6
     */
    @Nullable

        }
        return versionConstraint.equals(that.versionConstraint);
    }

    @Override
    public int hashCode() {
        int result = pluginId.hashCode();
        result = 31 * result + versionConstraint.hashCode();
        return result;
    }

    @Override
    public String toString() {
        String versionConstraintAsString = versionConstraint.toString();

        DependencyConstraintImpl(String group, String module, VersionConstraint versionConstraint, String reason, ImmutableAttributes attributes) {
            this.group = group;
            this.module = module;
            this.versionConstraint = versionConstraint;
            this.reason = reason;
            this.attributes = attributes;
        }

        @Override

    public DefaultMutableVersionConstraint(VersionConstraint versionConstraint) {
        this(versionConstraint.getPreferredVersion(), versionConstraint.getRequiredVersion(), versionConstraint.getStrictVersion(), versionConstraint.getRejectedVersions(), versionConstraint.getBranch());
    }

    public DefaultMutableVersionConstraint(String version) {
        this(null, version, null);

        }

        result.setVersionConstraint(versionConstraint);

        if (versionConstraint.getRange() == null) {
            result.addVersion(versionConstraint.getVersion());
        } else {
            VersionRange.Bound lowerBound = versionConstraint.getRange().getLowerBound();
            if (lowerBound != null
                    && lowerBound.equals(versionConstraint.getRange().getUpperBound())) {

        then:
        d.name == 'gradle-core'
        d.group == 'org.gradle'
        d.version == '4.4-beta2'
        d.versionConstraint.requiredVersion == '4.4-beta2'
        d.versionConstraint.preferredVersion == ''
        d.versionConstraint.strictVersion == ''
        d.versionConstraint.rejectedVersions == []

        !d.force
        !d.transitive
        !d.changing

        d.artifacts.size() == 1

        then:
        d.name == 'gradle-core'
        d.group == 'org.gradle'
        d.version == '4.4-beta2'
        d.versionConstraint.requiredVersion == '4.4-beta2'
        d.versionConstraint.preferredVersion == ''
        d.versionConstraint.strictVersion == ''
        d.versionConstraint.rejectedVersions == []

        !d.force
        !d.transitive
        !d.changing

        d.artifacts.size() == 1

    }

    public DefaultDependencyConstraint(ModuleIdentifier module, VersionConstraint versionConstraint) {
        this(module, new DefaultMutableVersionConstraint(versionConstraint));
    }

    private DefaultDependencyConstraint(ModuleIdentifier module, MutableVersionConstraint versionConstraint) {
        this.moduleIdentifier = module;
        this.versionConstraint = versionConstraint;
    }

        v[0].group == 'org.foo'
        v[0].module == 'bar'
        v[0].version == '1.0'
        v[0].versionConstraint.requiredVersion == '1.0'
        v[0].versionConstraint.preferredVersion == ''
        v[0].versionConstraint.strictVersion == ''
        v[0].versionConstraint.rejectedVersions == []
    }

    def "works with CharSequences"() {
        when: