//
// CHALLENGE (work in pairs):
// Move from f(o) -> o.f() and sure that the code is CQS compliant.
//


// 1
class CsvParser<T extends Lines> {
    Collection<T> parse(File location) {
    }
}


// 2
interface Pinger {
    void sendPing();
}


// 3
interface TcpSocket {
    Stream<Byte> startReading();
}





// 4
// Iovation - a company that maintains a blacklist of email addresses and corresponding IPs
interface IovationService {
    boolean shouldBlockWebsiteVisitor(IovationClientRequest request);
}

interface IovationClientRequest {
     String getEmail();
     String getIpAddress();
}




// 5
interface AnonymousUserAuthenticator {
    Token authenticate(String username, String password) throws WrongAuthenticationCredentialsProvided;
}




// 6
interface Test {
    interface TestResult {
        void print();
    }
    boolean over();
    Collection<TestResult> listTestResults();
}

if (test.over()) {
    for (TestResult tr : test.listTestResults()) {
        // pretty printing
        tr.print();
    }
}


// 7
boolean destroyButtonAvailable =
    widgets
        .stream()
        .filter(Widget::isButton)
        .filter(button -> button.label().equals("Destroy The World"))
        .isPresent();


// 8
interface File {
     void openAndThrowIfNotFound();
}