Why log-assert?

Quick Start

1. Add the dependency

<dependency>
  <groupId>io.github.usmanakram232</groupId>
  <artifactId>log-assert</artifactId>
  <version>1.0.2</version>
  <scope>test</scope>
</dependency>

2. Write your first log assertion

import static io.github.logassert.assertj.LogCaptorAssertions.assertThat;
import io.github.logassert.core.LogCaptor;
import io.github.logassert.junit5.*;

@ExtendWith(LogCaptorExtension.class)
class OrderServiceTest {

    @InjectLogCaptor
    LogCaptor logCaptor;

    @Test
    void payment_failure_is_logged() {
        orderService.processPayment(invalidRequest);

        assertThat(logCaptor)
            .atLevel(Level.ERROR)
            .fromLogger(OrderService.class)
            .single()
            .hasFormattedMessageContaining("Payment rejected")
            .hasThrowable(IllegalArgumentException.class);
    }
}

Quarkus setup

Quarkus resets the log manager after the extension class is loaded. Use @RegisterExtension static so the handler installs after that reset:

@QuarkusTest
class PaymentResourceTest {

    @RegisterExtension                       // MUST be static
    static LogCaptorExtension logExt = LogCaptorExtension.create();

    @InjectLogCaptor
    LogCaptor logCaptor;

    @Test
    void captures_payment_error() {
        assertThat(logCaptor).atLevel(Level.ERROR).isNotEmpty();
    }
}

API Reference

Compatibility Matrix