What is the @RepeatedTest annotation in JUnit 6?

import org.junit.jupiter.api.RepeatedTest;
import org.junit.jupiter.api.RepetitionInfo;

class RepeatedTestDemo {

    // Simple: run exactly 5 times
    @RepeatedTest(5)
    void repeatedTest() {
        assertTrue(Math.random() >= 0.0);
    }

    // Custom display name with placeholders:
    // {displayName}, {currentRepetition}, {totalRepetitions}
    @RepeatedTest(
        value = 5,
        name = "Repetition {currentRepetition} of {totalRepetitions}"
    )
    void namedRepetitions() {
        // Runs 5 times with names: "Repetition 1 of 5", "Repetition 2 of 5"...
    }

    // Inject RepetitionInfo to know which repetition you are in:
    @RepeatedTest(3)
    void withRepetitionInfo(RepetitionInfo info) {
        System.out.printf("Running repetition %d of %d%n",
            info.getCurrentRepetition(),
            info.getTotalRepetitions());

        // Common pattern: fail only on last repetition
        // to verify eventual consistency:
        if (info.getCurrentRepetition() == info.getTotalRepetitions()) {
            assertEquals("done", checkEventualState());
        }
    }
}

// Common use cases for @RepeatedTest:
// - Flaky test isolation (run 10x to catch intermittent failures)
// - Cache warm-up tests (first invocation is slow, later are fast)
// - Thread safety tests (repeated concurrent invocations)
// - Eventual consistency checks (state converges by Nth repetition)