Pasted

import org.junit.Test;
 
public class GuessTheNumberTest {
 
    @Test
    public void test() {
        final var oldRandomNumberGenerator = GuessTheNumber._randomNumberGenerator;
        GuessTheNumber._randomNumberGenerator = new MockRandomNumberGenerator(33);
        try {
            SystemInputOutputTester
                    .whenCallingThisMethod(() -> {GuessTheNumber.main(null);})
                    .assertTextOutput("Welcome to the number guessing program.")
                    //
                    .assertTextOutput("I am thinking of a number in the range of 1 to 100, inclusive.")
                    .assertTextOutput("You need to guess this number, with a minimum number of guesses.")
                    .assertTextOutput("Each time you guess, I will tell you if my number is HIGHER or LOWER than your guess.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("50")
                    .assertTextOutput("Your guess of 50 is TOO HIGH.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("25")
                    .assertTextOutput("Your guess of 25 is TOO LOW.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("37")
                    .assertTextOutput("Your guess of 37 is TOO HIGH.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("31")
                    .assertTextOutput("Your guess of 31 is TOO LOW.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("34")
                    .assertTextOutput("Your guess of 34 is TOO HIGH.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("32")
                    .assertTextOutput("Your guess of 32 is TOO LOW.")
                    //
                    .assertTextOutput("What is your guess?")
                    .provideLineInput("33")
                    .assertTextOutput("Your guess of 33 is CORRECT!")
                    //
                    .assertThatTheMethodReturnsHere();
        } finally {
            GuessTheNumber._randomNumberGenerator = oldRandomNumberGenerator;
        }
    }
 
}