### Configure Log Levels and Assertions

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Shows how to set specific log levels using LogCaptor and verify that only expected logs are captured based on the configured threshold.

```java
import static org.assertj.core.api.Assertions.assertThat;
import nl.altindag.log.LogCaptor;
import org.junit.jupiter.api.Test;

public class FooServiceShould {

    @Test
    public void logInfoAndWarnMessages() {
        LogCaptor logCaptor = LogCaptor.forClass(FooService.class);
        logCaptor.setLogLevelToInfo();

        FooService fooService = new FooService();
        fooService.sayHello();

        assertThat(logCaptor.getInfoLogs()).contains("Congratulations, you are pregnant!");
        assertThat(logCaptor.getDebugLogs())
            .doesNotContain("Keyboard not responding. Press any key to continue...")
            .isEmpty();
    }
}
```

--------------------------------

### Capture logging events with MDC in Java

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Demonstrates how to capture log events and verify Diagnostic Context (MDC) values using LogCaptor and AssertJ.

```java
import static org.assertj.core.api.Assertions.assertThat;

import nl.altindag.log.LogCaptor;
import nl.altindag.log.model.LogEvent;
import org.junit.jupiter.api.Test;

public class FooServiceShould {

   @Test
   void captureLoggingEventsContainingMdc() {
      LogCaptor logCaptor = LogCaptor.forClass(FooService.class);

      FooService service = new FooService();
      service.sayHello();

      List<LogEvent> logEvents = logCaptor.getLogEvents();

      assertThat(logEvents).hasSize(2);

      assertThat(logEvents.get(0).getDiagnosticContext())
              .hasSize(1)
              .extractingByKey("my-mdc-key")
              .isEqualTo("my-mdc-value");

      assertThat(logEvents.get(1).getDiagnosticContext()).isEmpty();
   }
}
```

--------------------------------

### Capture Exceptions in Logs

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Illustrates how to capture and assert log events that include thrown exceptions, verifying the exception type and message.

```java
import static org.assertj.core.api.Assertions.assertThat;
import nl.altindag.log.LogCaptor;
import nl.altindag.log.model.LogEvent;
import org.junit.jupiter.api.Test;

public class FooServiceShould {

    @Test
    void captureLoggingEventsContainingException() {
        LogCaptor logCaptor = LogCaptor.forClass(ZooService.class);
        FooService service = new FooService();
        service.sayHello();

        List<LogEvent> logEvents = logCaptor.getLogEvents();
        assertThat(logEvents).hasSize(1);

        LogEvent logEvent = logEvents.get(0);
        assertThat(logEvent.getMessage()).isEqualTo("Caught unexpected exception");
        assertThat(logEvent.getLevel()).isEqualTo("ERROR");
        assertThat(logEvent.getThrowable()).isPresent();

        assertThat(logEvent.getThrowable().get())
                .hasMessage("KABOOM!")
                .isInstanceOf(IOException.class);
    }
}
```

--------------------------------

### Configure Logback for Console Output

Source: https://github.com/hakky54/log-captor/blob/master/README.md

This XML configuration sets up Logback to append all log messages to the console with a specific pattern. This is used in conjunction with ConsoleCaptor.

```xml
<configuration>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="TRACE">
        <appender-ref ref="STDOUT" />
    </root>

</configuration>
```

--------------------------------

### Initialize and Reuse LogCaptor in JUnit Tests

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Demonstrates how to initialize LogCaptor once using @BeforeAll and clear logs between tests using @AfterEach. This approach ensures a clean state for each test execution.

```java
import nl.altindag.log.LogCaptor;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;

public class FooServiceShould {

    private static LogCaptor logCaptor;
    private static final String EXPECTED_INFO_MESSAGE = "Keyboard not responding. Press any key to continue...";
    private static final String EXPECTED_WARN_MESSAGE = "Congratulations, you are pregnant!";
    
    @BeforeAll
    public static void setupLogCaptor() {
        logCaptor = LogCaptor.forClass(FooService.class);
    }

    @AfterEach
    public void clearLogs() {
        logCaptor.clearLogs();
    }
    
    @AfterAll
    public static void tearDown() {
        logCaptor.close();
    }

    @Test
    public void logInfoAndWarnMessagesAndGetWithEnum() {
        FooService service = new FooService();
        service.sayHello();

        assertThat(logCaptor.getInfoLogs()).containsExactly(EXPECTED_INFO_MESSAGE);
        assertThat(logCaptor.getWarnLogs()).containsExactly(EXPECTED_WARN_MESSAGE);

        assertThat(logCaptor.getLogs()).hasSize(2);
    }
}
```

--------------------------------

### Add ConsoleCaptor and Logback Dependencies

Source: https://github.com/hakky54/log-captor/blob/master/README.md

These XML dependencies are required to use the ConsoleCaptor for capturing logs and logback-classic for logging configuration.

```xml
<dependencies>
   <dependency>
      <groupId>io.github.hakky54</groupId>
      <artifactId>consolecaptor</artifactId>
      <scope>test</scope>
   </dependency>

   <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <scope>test</scope>
   </dependency>

</dependencies>
```

--------------------------------

### Capture Logs with LogCaptor in Java

Source: https://github.com/hakky54/log-captor/blob/master/README.md

This snippet demonstrates how to capture log messages using LogCaptor for a Java class. It shows the service class that generates logs and a corresponding JUnit test class that initializes LogCaptor, triggers the logging, and then asserts the captured log messages based on their levels or retrieves all captured logs.

```java
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class FooService {

    private static final Logger LOGGER = LogManager.getLogger(FooService.class);

    public void sayHello() {
        LOGGER.info("Keyboard not responding. Press any key to continue...");
        LOGGER.warn("Congratulations, you are pregnant!");
    }

}
```

```java
import static org.assertj.core.api.Assertions.assertThat;

import nl.altindag.log.LogCaptor;
import org.junit.jupiter.api.Test;

public class FooServiceShould {

    @Test
    public void logInfoAndWarnMessages() {
        LogCaptor logCaptor = LogCaptor.forClass(FooService.class);

        FooService fooService = new FooService();
        fooService.sayHello();

        // Get logs based on level
        assertThat(logCaptor.getInfoLogs()).containsExactly("Keyboard not responding. Press any key to continue...");
        assertThat(logCaptor.getWarnLogs()).containsExactly("Congratulations, you are pregnant!");

        // Get all logs
        assertThat(logCaptor.getLogs())
                .hasSize(2)
                .contains(
                    "Keyboard not responding. Press any key to continue...",
                    "Congratulations, you are pregnant!"
                );
    }
}
```

--------------------------------

### Access LogCaptor returnable values in Java

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Illustrates how to retrieve various log levels and extract detailed metadata from LogEvent objects such as thread names, timestamps, and throwables.

```java
import nl.altindag.log.LogCaptor;
import nl.altindag.log.model.LogEvent;

import java.time.ZonedDateTime;
import java.util.List;
import java.util.Map;
import java.util.Optional;

import org.junit.jupiter.api.Test;

class FooServiceShould {

   @Test
   void showCaseAllReturnableValues() {
        LogCaptor logCaptor = LogCaptor.forClass(FooService.class);

        List<String> logs = logCaptor.getLogs();
        List<String> infoLogs = logCaptor.getInfoLogs();
        List<String> debugLogs = logCaptor.getDebugLogs();
        List<String> warnLogs = logCaptor.getWarnLogs();
        List<String> errorLogs = logCaptor.getErrorLogs();
        List<String> traceLogs = logCaptor.getTraceLogs();

        LogEvent logEvent = logCaptor.getLogEvents().get(0);
        String message = logEvent.getMessage();
        String formattedMessage = logEvent.getFormattedMessage();
        String level = logEvent.getLevel();
        List<Object> arguments = logEvent.getArguments();
        String loggerName = logEvent.getLoggerName();
        String threadName = logEvent.getThreadName();
        ZonedDateTime timeStamp = logEvent.getTimeStamp();
        Map<String, String> diagnosticContext = logEvent.getDiagnosticContext();
        Optional<Throwable> throwable = logEvent.getThrowable();
    }
    
}
```

--------------------------------

### Capture Logs in Quarkus Test with ConsoleCaptor

Source: https://github.com/hakky54/log-captor/blob/master/README.md

This Java test class demonstrates how to use ConsoleCaptor within a Quarkus test to capture log output from a resource. It ensures that the log message 'Hello' is captured.

```java
import io.quarkus.test.junit.QuarkusTest;
import nl.altindag.console.ConsoleCaptor;
import org.junit.jupiter.api.Test;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;

@QuarkusTest
class QuarkusTestTest {

    @Test
    void captureLogs() {
        try(ConsoleCaptor consoleCaptor = new ConsoleCaptor()) {
           HelloResource resource = new HelloResource();
           resource.hello();

           List<String> standardOutput = consoleCaptor.getStandardOutput();

           assertThat(standardOutput)
                   .hasSize(1)
                   .contains("Hello");
        }
    }

}
```

--------------------------------

### Disable console output via logback-test.xml

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Configures Logback to suppress console output during tests by adding a status listener to the configuration file.

```xml
<configuration>
   <statusListener class="ch.qos.logback.core.status.NopStatusListener" />
</configuration>
```

--------------------------------

### Exclude conflicting SLF4J dependencies in build tools

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Resolves 'multiple SLF4J bindings' errors by excluding specific logging implementations during test phases. This ensures Log Captor's Logback implementation takes precedence.

```xml
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <configuration>
                <classpathDependencyExcludes>
                    <classpathDependencyExclude>org.apache.logging.log4j:log4j-slf4j-impl</classpathDependencyExclude>
                    <classpathDependencyExclude>org.apache.logging.log4j:log4j-slf4j2-impl</classpathDependencyExclude>
                </classpathDependencyExcludes>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-failsafe-plugin</artifactId>
            <configuration>
                <classpathDependencyExcludes>
                    <classpathDependencyExclude>org.apache.logging.log4j:log4j-slf4j-impl</classpathDependencyExclude>
                    <classpathDependencyExclude>org.apache.logging.log4j:log4j-slf4j2-impl</classpathDependencyExclude>
                </classpathDependencyExcludes>
            </configuration>
        </plugin>
    </plugins>
</build>
```

```groovy
configurations {
    testImplementation {
        exclude(group = "org.apache.logging.log4j", module = "log4j-slf4j-impl")
        exclude(group = "org.apache.logging.log4j", module = "log4j-slf4j2-impl")
    }
}
```

--------------------------------

### Disable logs for a specific class in Java

Source: https://github.com/hakky54/log-captor/blob/master/README.md

Shows how to suppress logging output from a specific class during unit tests using LogCaptor's disable and reset methods.

```java
import static org.assertj.core.api.Assertions.assertThat;

import nl.altindag.log.LogCaptor;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AutoClose;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

public class FooServiceShould {

    @AutoClose
    private static LogCaptor logCaptorForSomeOtherService = LogCaptor.forClass(SomeService.class);

    @BeforeAll
    static void disableLogs() {
        logCaptorForSomeOtherService.disableLogs();
    }

    @AfterAll
    static void resetLogLevel() {
        logCaptorForSomeOtherService.resetLogLevel();
    }

    @Test
    void logInfoAndWarnMessages() {
        LogCaptor logCaptor = LogCaptor.forClass(FooService.class);

        FooService service = new FooService();
        service.sayHello();

        assertThat(logCaptor.getLogs())
                .hasSize(2)
                .contains(
                    "Keyboard not responding. Press any key to continue...",
                    "Congratulations, you are pregnant!"
                );
    }
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.