TestingIntermediateTST-38

Which JUnit 5 annotations run before each test and mark a parameterized test?

@BeforeEach and @ParameterizedTest

JUnit 5 (Jupiter) basics:

@Test: a test method.
@BeforeEach / @AfterEach: run around every test (set up and clean up).
@BeforeAll / @AfterAll: once per class (static).
@ParameterizedTest with @ValueSource, @CsvSource: run one test with many inputs.
@DisplayName, @Disabled, @Nested.

Assertions: assertEquals, assertTrue, assertThrows. AssertJ offers fluent alternatives.

@ParameterizedTest
@CsvSource({"2,3,5", "10,-4,6"})
void adds(int a, int b, int expected) {
    assertEquals(expected, a + b);
}

@BeforeEach = per test. @ParameterizedTest = many inputs.