@Override
    public boolean canDetermineActivation(Profile profile) {
        Activation activation = profile.getActivation();
        return activation != null && activation.getOs() != null;
    }

    @Override
    public boolean isActive(Profile profile) {
        Activation activation = profile.getActivation();
        ActivationOS os = activation.getOs();

        boolean result = ensureAtLeastOneNonNull(os);

/**
 * Tests {@code Activation}.
 *
 */
class ActivationTest {

    @Test
    void testHashCodeNullSafe() {
        new Activation().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Activation().equals(null));

        new Activation().equals(new Activation());
    }

    @Test
    void testEqualsIdentity() {

 */
@Deprecated
public class DefaultProfileSelectorTest {
    private Profile newProfile(String id) {
        Activation activation = new Activation();
        Profile profile = new Profile();
        profile.setId(id);
        profile.setActivation(activation);
        return profile;
    }

    @Test
    void testThrowingActivator() {

        activation = new ProjectActivation();
        performProjectActivation(
                parser.parse(options, new String[] {"-pl", "test1,+test2,?test3,+?test4"}), activation);
        assertContainsExactlyInAnyOrder(activation.getRequiredActiveProjectSelectors(), "test1", "test2");
        assertContainsExactlyInAnyOrder(activation.getOptionalActiveProjectSelectors(), "test3", "test4");

        activation = new ProjectActivation();

                result.getWarnings().get(0));

        assertEquals(
                "'profiles.profile[missing-project-version].activation.file.missing' "
                        + "Failed to interpolate profile activation property ${project.version}/test.txt: "
                        + "${project.version} expressions are not supported during profile activation.",
                result.getWarnings().get(1));

        return profile.getActivation() != null && profile.getActivation().getFile() != null;
    }

    @Override
    public boolean isActive(Profile profile) {
        Activation activation = profile.getActivation();

        ActivationFile actFile = activation.getFile();

        if (actFile != null) {
            // check if the file exists, if it does then the profile will be active
            String fileString = actFile.getExists();

                                    + " expressions are not supported during profile activation.",
                            locationSupplier.get());
                }
            }
        };
        Optional<Activation> root = Optional.of(activation);
        stk.push(new ActivationFrame("activation", root));

    }

    @Override
    public boolean isActive(Profile profile) throws ProfileActivationException {
        Activation activation = profile.getActivation();

        ActivationProperty property = activation.getProperty();

        if (property != null) {
            String name = property.getName();
            boolean reverseName = false;

            if (name == null) {

                    + ") with new instance from source: " + profile.getSource());
        }

        profilesById.put(profile.getId(), profile);

        Activation activation = profile.getActivation();

        if (activation != null && activation.isActiveByDefault()) {
            activateAsDefault(profileId);
        }
    }

    /* (non-Javadoc)

    private static final String JDK_VERSION = System.getProperty("java.version");

    @Override
    public boolean isActive(Profile profile) throws ProfileActivationException {
        Activation activation = profile.getActivation();

        String jdk = activation.getJdk();

        // null case is covered by canDetermineActivation(), so we can do a straight startsWith() here.
        if (jdk.startsWith("[") || jdk.startsWith("(")) {