test-logger's Introduction

test-logger

Goal

This is a test utility to fine tune log settings in tests configurable for each test.

include in your pom

<dependency>
    <groupId>de.idealo.test</groupId>
    <artifactId>test-logger</artifactId>
    <version>v0.2</version>
    <scope>test</scope>
</dependency>

Samples

Swallow all logs

public class SwallowAllLogsTest {

    private final Logger log = LoggerFactory.getLogger("test");

    @Rule
    public TestRule testLogger = TestLoggerRuleFactory.silent();

    @Test
    public void test(){
        // this will swallowed
        log.error("ddd");
    }
}

Log only errors

public class LogOnlyErrorsTest {

    private final Logger log = LoggerFactory.getLogger("test");

    @Rule
    public TestRule testLogger = TestLoggerRuleFactory.error();

    @Test
    public void test(){
        // this will swallowed
        log.warn("ddd");
        //this will be visible
        log.error("really important log message for test");
    }
}

Specific level per logger

public class LogLevelPerLoggerTest {

    private final Logger log1 = LoggerFactory.getLogger("test1");
    private final Logger log2 = LoggerFactory.getLogger("test2");

    @Rule
    public TestRule testLogger = TestLoggerRuleFactory
            .withLevel("test1", Level.ERROR)
            .silence("test2")
            .build();

    @Test
    public void test(){
        //this will be visible
        log1.error("really important log message for test");
        // this will be swallowed
        log2.error("not important log message for test");
    }
}