import org.gradle.util.Path;

public class DefaultProjectDescriptorRegistry extends DefaultProjectRegistry<DefaultProjectDescriptor> implements ProjectDescriptorRegistry {

    @Override
    public void changeDescriptorPath(Path oldPath, Path newPath) {
        DefaultProjectDescriptor projectDescriptor = removeProject(oldPath.toString());
        projectDescriptor.setPath(newPath);
        addProject(projectDescriptor);
    }

import org.gradle.api.internal.project.ProjectRegistry;
import org.gradle.util.Path;

public interface ProjectDescriptorRegistry extends ProjectRegistry<DefaultProjectDescriptor> {
    void changeDescriptorPath(Path oldPath, Path newPath);

        // Project is added as a side effect
        DefaultProjectDescriptor project = new DefaultProjectDescriptor(null, "name", TEST_DIR, registry, FILE_RESOLVER);

        registry.changeDescriptorPath(Path.path(":"), Path.path(":newPath"));
        assertThat(registry.getRootProject(), nullValue());
        assertThat(registry.getProject(":"), nullValue());

        def registry = Mock(ProjectDescriptorRegistry)
        descriptor.setProjectDescriptorRegistry(registry)

        when:
        descriptor.name = "newName"

        then:
        1 * registry.changeDescriptorPath(Path.path(Project.PATH_SEPARATOR + testName.methodName), Path.path(Project.PATH_SEPARATOR + "newName"))
        descriptor.name == "newName"
    }

    def "can set relative project directory"() {
        given:

    }

    @Override
    public void setName(String name) {
        NameValidator.validate(name, "project name",
            INVALID_NAME_IN_INCLUDE_HINT);
        projectDescriptorRegistry.changeDescriptorPath(path, path(name));
        this.name = name;
        this.nameExplicitlySet = true;
    }

    public boolean isExplicitName() {
        return nameExplicitlySet;
    }

    @Override