Java 테스트 책임 및 작업 범위에 대한 간략한 소개

import org.junit.Test;
import static org.junit.Assert.*;

public class CalculatorTest {

    @Test
    public void testAdd() {
        Calculator calculator = new Calculator();
        int result = calculator.add(2, 3);
        assertEquals(5, result);
    }

    @Test
    public void testDivide() {
        Calculator calculator = new Calculator();
        double result = calculator.divide(10, 2);
        assertEquals(5.0, result, 0.001);
    }

    @Test(expected = ArithmeticException.class)
    public void testDivideByZero() {
        Calculator calculator = new Calculator();
        calculator.divide(10, 0);
    }
}

import org.junit.Test;
import static org.mockito.Mockito.*;

public class ProductServiceTest {

    @Test
    public void testGetProductById() {
        ProductDao productDao = mock(ProductDao.class);
        when(productDao.getProductById(1))
                .thenReturn(new Product(1, "iPhone", 999.99));

        ProductService productService = new ProductService(productDao);
        Product product = productService.getProductById(1);

        assertEquals("iPhone", product.getName());
        assertEquals(999.99, product.getPrice(), 0.001);
    }
}

import org.junit.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import static org.junit.Assert.*;

public class SearchTest {

    @Test
    public void testSearch() {
        System.setProperty("webdriver.chrome.driver", "path_to_chrome_driver");
        WebDriver driver = new ChromeDriver();

        driver.get("http://www.example.com");
        driver.findElement(By.id("searchInput")).sendKeys("test");
        driver.findElement(By.id("searchButton")).click();

        WebElement resultElement = driver.findElement(By.id("result"));
        assertTrue(resultElement.getText().startsWith("Found"));
        
        driver.close();
    }
}