/**
 * Circle CI support.
 */
public class CircleCIDetector implements CIDetector {
    public static final String NAME = "CircleCI";

    private static final String CIRCLECI = "CIRCLECI";

    @Override
    public Optional<CIInfo> detectCI() {
        String ciEnv = System.getenv(CIRCLECI);
        if ("true".equals(ciEnv)) {
            return Optional.of(new CIInfo() {
                @Override

    void jenkins() throws Exception {
        assertEquals(JenkinsCIDetector.NAME + ";", runner(Map.of("CI", "true", "WORKSPACE", "foobar")));
    }

    @Test
    void circleci() throws Exception {
        assertEquals(CircleCIDetector.NAME + ";", runner(Map.of("CIRCLECI", "true")));
    }

    @Test
    void teamcity() throws Exception {
        assertEquals(TeamcityCIDetector.NAME + ";", runner(Map.of("TEAMCITY_VERSION", "1.2.3")));