package com.baeldung.systemrules;

import static com.github.stefanbirkner.systemlambda.SystemLambda.withTextFromSystemIn;
import static org.junit.Assert.assertEquals;

import java.util.Scanner;

import org.junit.jupiter.api.Test;

class SystemInUnitTest {

    @Test
    void givenTwoNames_whenSystemInMock_thenNamesJoinedTogether() throws Exception {
        withTextFromSystemIn("Jonathan", "Cook").execute(() -> {
            assertEquals("Names should be concatenated", "Jonathan Cook", getFullname());
        });
    }

    private String getFullname() {
        try (Scanner scanner = new Scanner(System.in)) {
            String firstName = scanner.next();
            String surname = scanner.next();
            return String.join(" ", firstName, surname);
        }
    }

}