https://github.com/sterlp/log4j-test-logger

Simple in memory log4j2 appender to assert log messages in JUnit tests
https://github.com/sterlp/log4j-test-logger

appender assert junit junit5 log log4j2 logging logs message test testing

Last synced: 13 days ago
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Simple in memory log4j2 appender to assert log messages in JUnit tests

• Host: GitHub
• URL: https://github.com/sterlp/log4j-test-logger
• Owner: sterlp
• License: mit
• Created: 2021-05-04T05:42:04.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2022-02-02T20:15:53.000Z (almost 3 years ago)
• Last Synced: 2024-04-16T07:09:17.365Z (7 months ago)
• Topics: appender, assert, junit, junit5, log, log4j2, logging, logs, message, test, testing
• Language: Java
• Homepage:
• Size: 23.4 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# log4j-test-logger

Simple in memory log4j2 appender to assert logs in JUnit tests.

# Alternative if you use Spring

https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/test/system/OutputCaptureExtension.html

# Usage

```java

    @BeforeEach

    void before() {

        TestAppender.clear();

    }

    @Test

    void yourTestMethod() {

        // GIVEN: log is clean

        TestAppender.clear();

        // WHEN: I call my fancy method

        subject.doFancyStuff(argument);

        // THEN: I should have

        assertFalse(TestAppender.first(Level.INFO, "Fancy method executed").isPresent());

        assertEquals(1, TestAppender.count(Level.INFO));

        assertEquals(0, TestAppender.count(Level.WARN));     

        assertEquals(0, TestAppender.count(Level.ERROR));

    }

```

# Configuration

## Dependency Maven pom.xml

```xml

        

            org.sterl.test.log4j

            log4j-test-logger

            0.1.0

            test

        

```

## Configuration log4j2.xml

In your `src/test/resources` add or extend the log4j file:

```xml

    

        

            

        

        

        

    

    

        

            

            

            

        

    

```