import org.gradle.util.TestUtil

class DefaultPropertyTest extends AbstractPropertySpec<String> {
    DefaultProperty<String> property() {
        return propertyWithDefaultValue(String)
    }

    DefaultProperty propertyWithDefaultValue(Class type) {
        return new DefaultProperty(host, type)
    }

    @Override
    DefaultProperty<String> propertyWithNoValue() {
        return property()
    }

import org.gradle.util.TestUtil

class DefaultListPropertyTest extends CollectionPropertySpec<List<String>> {
    @Override
    AbstractCollectionProperty<String, List<String>> propertyWithDefaultValue() {
        return property()
    }

    @Override
    DefaultListProperty<String> property() {
        return new DefaultListProperty<String>(host, String)
    }

    @Override

import static org.gradle.api.internal.provider.Providers.notDefined

abstract class CollectionPropertySpec<C extends Collection<String>> extends PropertySpec<C> {
    AbstractCollectionProperty<String, C> propertyWithDefaultValue() {
        return property()
    }

    @Override
    AbstractCollectionProperty<String, C> propertyWithNoValue() {
        def p = property()
        p.set((List) null)
        return p
    }