TestFeatureManager.java

package org.togglz.testing;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.togglz.core.Feature;
import org.togglz.core.manager.FeatureManager;
import org.togglz.core.metadata.FeatureMetaData;
import org.togglz.core.metadata.enums.EnumFeatureMetaData;
import org.togglz.core.repository.FeatureState;
import org.togglz.core.spi.ActivationStrategy;
import org.togglz.core.user.FeatureUser;
import org.togglz.core.util.Validate;

import static java.util.Collections.emptyList;

/**
 * 
 * A {@link FeatureManager} implementation that allows easy manipulation of features in testing environments.
 * 
 * @author Christian Kaltepoth
 * 
 */
public class TestFeatureManager implements FeatureManager {

    private final Class<? extends Feature> featureEnum;

    private final Set<String> activeFeatures = new HashSet<String>();

    public TestFeatureManager(Class<? extends Feature> featureEnum) {
        Validate.notNull(featureEnum, "The featureEnum argument is required");
        Validate.isTrue(featureEnum.isEnum(), "This feature manager currently only works with feature enums");
        this.featureEnum = featureEnum;
    }

    @Override
    public String getName() {
        return this.getClass().getSimpleName() + ":" + featureEnum.getSimpleName();
    }

    @Override
    public Set<Feature> getFeatures() {
        return new HashSet<Feature>(Arrays.asList(featureEnum.getEnumConstants()));
    }

    @Override
    public FeatureMetaData getMetaData(Feature feature) {
        return new EnumFeatureMetaData(feature);
    }

    @Override
    public boolean isActive(Feature feature) {
        return activeFeatures.contains(feature.name());
    }

    @Override
    public FeatureUser getCurrentFeatureUser() {
        return null;
    }

    @Override
    public FeatureState getFeatureState(Feature feature) {
        return new FeatureState(feature, isActive(feature));
    }

    @Override
    public void setFeatureState(FeatureState state) {
        if (state.isEnabled()) {
            activeFeatures.add(state.getFeature().name());
        } else {
            activeFeatures.remove(state.getFeature().name());
        }
    }

    @Override
    public List<ActivationStrategy> getActivationStrategies() {
        return emptyList();
    }

    public TestFeatureManager enable(Feature feature) {
        activeFeatures.add(feature.name());
        return this;
    }

    public TestFeatureManager disable(Feature feature) {
        activeFeatures.remove(feature.name());
        return this;
    }

    public TestFeatureManager enableAll() {
        for (Feature feature : featureEnum.getEnumConstants()) {
            enable(feature);
        }
        return this;
    }

    public TestFeatureManager disableAll() {
        activeFeatures.clear();
        return this;
    }

}