package com.example;

import org.junit.jupiter.api.Test;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import static org.junit.jupiter.api.Assertions.*;

public class MainTest {

    private String captureOutput() {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        PrintStream original = System.out;
        System.setOut(new PrintStream(out));
        Main.processMembership();
        System.setOut(original);
        return out.toString().trim();
    }

    @Test
    void testMembershipMatches() {
        String output = captureOutput();
        assertTrue(output.contains("Membership matches: true"),
            "Membership ID should match 'VIP-2026-XL'. Got: " + output);
    }

    @Test
    void testValidMembershipData() {
        String output = captureOutput();
        assertTrue(output.contains("Valid membership data: true"),
            "Membership data should be valid. Got: " + output);
    }

    @Test
    void testUsernameExtraction() {
        String output = captureOutput();
        assertTrue(output.contains("Username: espresso.lover"),
            "Username should be 'espresso.lover' (before '@'). Got: " + output);
    }
   @Test
    void testMembershipMessage() {
        String output = captureOutput();
        assertTrue(output.contains("Membership message: Member espresso.lover has active membership VIP-2026-XL"),
            "Membership message is incorrect. Got: " + output);
    }
}

MainTest.java

Dive into the fundamentals of Java by learning the core concepts that power modern applications. Explore variables, data types, operators, conditionals, and strings while building a strong foundation in programming. Through practical examples and hands-on challenges, you'll develop the skills needed to write, understand, and troubleshoot Java code with confidence.

Discover how to begin your Java journey by learning what Java is, where it is used, and how Java programs are structured. Understand how to print output, write comments, and build the foundation needed for all future programming concepts.

Master the skills needed to store, manage, and work with data in Java. Learn how variables, constants, data types, operators, and type casting work, and apply these concepts through practical coding exercises and real-world examples.

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Dive into the fundamentals of working with text in Java. Learn how strings are created and manipulated, explore formatting and comparison techniques, validate user input, extract useful information from text, and apply these skills in realistic programming scenarios.

Challenge: Validating Member Information

Solution