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An in-memory SLF4J implementation focused on aiding unit testing.

There is a newer version: 3.0.1

package com.github.valfirst.slf4jtest;

import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

/**
 * A JUnit rule that clears the ThreadLocal
 * state of all the TestLoggers and the TestLoggerFactory.
 */
public class TestLoggerFactoryResetRule implements TestRule {

    @Override
    public Statement apply(final Statement base, final Description description) {
        return new TestLoggerFactoryResettingStatement(base);
    }

    private static class TestLoggerFactoryResettingStatement extends Statement {
        private final Statement base;

        public TestLoggerFactoryResettingStatement(final Statement base) {
            super();
            this.base = base;
        }

        @Override
        public void evaluate() throws Throwable {
            TestLoggerFactory.clear();
            try {
                base.evaluate();
            } finally {
                TestLoggerFactory.clear();
            }
        }
    }
}