package com.example;

import static org.junit.jupiter.api.Assertions.assertTrue;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.regex.Pattern;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

public class MainTest {
    @Test
    @DisplayName("Prints correct sum for values (1000000000 + 1000000000)")
    void testNormalSum() {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        PrintStream originalOut = System.out;
        System.setOut(new PrintStream(out));
        Main.main(new String[]{});
        System.setOut(originalOut);
        String output = out.toString().trim();
        assertTrue(Pattern.compile("2000000000").matcher(output).find(), "Expected output to contain 2000000000, got: " + output);
    }
}


MainTest.java

A comprehensive course on Java data types, covering primitives, reference types, type conversion, and practical applications. Designed for learners with basic Java syntax knowledge.

Explore Java's built-in primitive data types, their properties, and how to use them effectively.

Delve into Java's reference types, focusing on Strings and arrays, and how they differ from primitives.

Learn about type casting, automatic conversions, and the use of wrapper classes for primitives.

Challenge: Integer Operations

Solution