* limitations under the License.
 */

package org.gradle.integtests.tooling;

import org.gradle.tooling.BuildAction;
import org.gradle.tooling.BuildController;

public class NullAction implements BuildAction<Object> {
    public Object execute(BuildController controller) {
        return null;
    }

 * limitations under the License.
 */

package org.gradle.integtests.tooling.r18;

import org.gradle.tooling.BuildAction;
import org.gradle.tooling.BuildController;

public class NullAction implements BuildAction<Object> {
    public Object execute(BuildController controller) {
        return null;
    }

 * limitations under the License.
 */

package org.gradle.integtests.tooling.r43

import org.gradle.integtests.tooling.fixture.ToolingApiSpecification
import org.gradle.integtests.tooling.r18.NullAction
import org.gradle.tooling.ProjectConnection
import org.gradle.tooling.model.eclipse.EclipseProject

abstract class ToolingApiVersionSpecification extends ToolingApiSpecification {
    def outputStream

import org.gradle.integtests.tooling.fixture.ToolingApiSpecification
import org.gradle.integtests.tooling.fixture.WithOldConfigurationsSupport
import org.gradle.integtests.tooling.r18.NullAction
import org.gradle.tooling.ProjectConnection
import org.gradle.tooling.events.OperationType
import org.gradle.tooling.model.gradle.BuildInvocations

import javax.annotation.Nullable;
import java.io.Serializable;
import java.util.Collection;
import java.util.List;

public abstract class Actions {

    static final Action<?> DO_NOTHING = new NullAction<Object>();

    /**
     * Creates an action implementation that simply does nothing.
     *
     * A new action instance is created each time.
     *
     * @return An action object with an empty implementation

    def "tooling api reports an error when running a build action using a gradle version does not implement the tooling api"() {
        when:
        toolingApi.withConnection { ProjectConnection connection -> connection.action(new NullAction()).run() }

        then:
        UnsupportedVersionException e = thrown()

        then:
        ideaModel.name == "hello-world"
        ideaModel.modules.size() == 1

        when:
        def nullModel = withConnection { it.action(new NullAction()).run() }

        then:
        nullModel == null
    }

    def "action classes are reused in daemon"() {
        toolingApi.requireIsolatedDaemons()

        expect: