import org.junit.jupiter.api.Timeout;
import java.util.concurrent.TimeUnit;

class OrderSearchPerformanceTest {

    // @Timeout: test fails if it takes longer than the specified duration
    // Applied at method level
    @Test
    @Timeout(value = 2, unit = TimeUnit.SECONDS)
    @Tag("performance")
    @DisplayName("Searching orders by customer email returns within 2 seconds")
    void searchingOrdersByEmailReturnsWithinTwoSeconds() {
        List<Order> results = orderRepository.findByEmail("[email protected]");
        assertNotNull(results);
        // If this takes >2s, test fails with:
        // org.opentest4j.AssertionFailedError: method timed out after 2 seconds
    }

    // Apply @Timeout at class level to set a default for ALL tests in the class
    @Timeout(5) // 5 seconds default for every test
    class AllSearchesMustBeFast {

        @Test
        void searchByEmailIsWithin5Seconds() { /* ... */ }

        @Test
        @Timeout(1) // override: this specific test must complete in 1 second
        void searchByIdIsWithin1Second() { /* ... */ }
    }
}

// Global timeout: set in junit-platform.properties
// junit.jupiter.execution.timeout.default=30s  (safety net for all tests)

<plugin>
    <groupId>org.pitest</groupId>
    <artifactId>pitest-maven</artifactId>
    <version>1.16.1</version>
    <dependencies>
        <!-- JUnit 5/6 Platform support for PIT -->
        <dependency>
            <groupId>org.pitest</groupId>
            <artifactId>pitest-junit5-plugin</artifactId>
            <version>1.2.1</version>
        </dependency>
    </dependencies>
    <configuration>
        <!-- Target only your application code, not generated or config classes -->
        <targetClasses>
            <param>com.example.service.*</param>
            <param>com.example.domain.*</param>
        </targetClasses>
        <!-- Only run fast unit tests (tagged 'unit') for mutation analysis -->
        <targetTests>
            <param>com.example.*Test</param>
        </targetTests>
        <!-- Mutation operators to apply -->
        <mutators>
            <mutator>STRONGER</mutator> <!-- recommended set for Java -->
        </mutators>
        <!-- Fail build if mutation score drops below 80% -->
        <mutationThreshold>80</mutationThreshold>
        <!-- Output formats: HTML (human), XML (CI integration) -->
        <outputFormats>
            <outputFormat>HTML</outputFormat>
            <outputFormat>XML</outputFormat>
        </outputFormats>
        <!-- Verbose: show each mutant result -->
        <verbose>false</verbose>
    </configuration>
</plugin>

# Run mutation tests and generate report
mvn test-compile org.pitest:pitest-maven:mutationCoverage

# Or bind to verify phase: mvn verify
# Report generated at: target/pit-reports/YYYYMMDDHHMI/index.html