What are the main annotations in JUnit 5?

Core Test Annotations:

• @Test: Marks a method as a test method
• @ParameterizedTest: Indicates a parameterized test
• @RepeatedTest: Repeats test execution multiple times
• @TestFactory: Defines a method for dynamic test generation

Lifecycle Annotations:

• @BeforeEach: Executed before each test method
• @AfterEach: Executed after each test method
• @BeforeAll: Executed once before all test methods (static)
• @AfterAll: Executed once after all test methods (static)

Organization Annotations:

• @DisplayName: Provides custom display name for tests
• @Nested: Creates nested test classes for better organization
• @Tag: Tags tests for filtering and grouping
• @Disabled: Disables a test method or class

Example Usage:

@DisplayName("Calculator Tests")
class CalculatorTest {
    
    @BeforeEach
    void setUp() {
        calculator = new Calculator();
    }
    
    @Test
    @DisplayName("Should add two positive numbers correctly")
    void testAddition() {
        assertEquals(5, calculator.add(2, 3));
    }
    
    @Nested
    @DisplayName("Division Tests")
    class DivisionTests {
        
        @Test
        void testValidDivision() {
            assertEquals(2, calculator.divide(10, 5));
        }
        
        @Test
        @Disabled("Division by zero behavior under review")
        void testDivisionByZero() {
            // Test implementation
        }
    }
}