JUnit?? ?? ???? ???? ??

??:

??? ???? ?? ?? ??? ????? ??? ???? ??? ??? ???? ??? ???? ??? ????. Java?? ??? ??? ???? ???? ???? ?????. ? ????? JUnit ?????? ???? ?? ??? ?? ?? ???? ???? ??? ?????.

?? ???? ?? JUnit ???:

??? ??? ?? ??? ??? ???? ?? ??? ???. ?? ??(?: INFO) ? ???("x ??")? ?? ?? ?? ??? ??? ?? ??? ?? ???????. ?? ????? ?? ???? ???? ???? ??? ?? ?? ?? ???? ??? ? ????.

??? ?? ??/??? ?? ??:

? ?? ??? ????? ?? ??? ???? ???. ?? ?? ???? ???? ???. ??? ??? ?? ??? ?? ?? ? ??? ?? ??? ???? ??? ???? ???? ??? ? ????. ??? ? ?? ??? ????? ??? ? ??? ??? ?? ??? ???? ???.

?? ??? ??:

?? ??? ???? ??? ?? ??? ?? ???? ???? ????. ????? ??? ?? ???? ?????. ?? ??? ? ?? ??? ??? ????.

1. Appender ???:
   appender() ???? ????? ?? ???? ??? ??? ???? ??? ?? Appender ?? ???? ?????( ?: ??).
2. Logger? Appender ??:
   ??? ??? ??? ?? Appender ????? ?????. ? ??? ??? ??? ??? ????? @Before ? @After? ?? ??? ???? ??? ? ????.
3. ??? ??? ??:
   ??? ?? ??? ??? ? ??? ??? ??? ?????. Appender? ???. ?? ?? ??? ?? ??? ??? ?? JUnit? ??? ???? ???? ?? ??? ??, ??? ? ?? ??? ??? ? ????.

?? ??:

?? ?? ??? ?? ??? ??? ?????.

<code class="java">import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;

import static org.junit.Assert.assertThat;
import static org.hamcrest.CoreMatchers.is;

public class LogCollectorTest {

    @Test
    public void testLogMessage() {
        // Create a custom appender to collect logging events.
        final TestAppender appender = new TestAppender();

        // Add the appender to the logger we wish to test.
        final Logger logger = Logger.getLogger(LogCollectorTest.class);
        logger.addAppender(appender);

        // Execute code under test.
        logger.info("Test");

        // Retrieve the list of logged events.
        final List<LoggingEvent> logs = appender.getLog();

        // Perform assertions on the first log entry.
        assertThat(logs.get(0).getLevel(), is(Level.INFO));
        assertThat(logs.get(0).getMessage(), is("Test"));
    }

    private static class TestAppender extends AppenderSkeleton {
        private final List<LoggingEvent> log = new ArrayList<>();

        @Override
        public boolean requiresLayout() {
            return false;
        }

        @Override
        protected void append(LoggingEvent loggingEvent) {
            log.add(loggingEvent);
        }

        @Override
        public void close() { }

        public List<LoggingEvent> getLog() {
            return new ArrayList<>(log);
        }
    }
}</code>

??:

?? ??? ??? ??? ???? ??? ??? ??? ?????. JUnit ???? ?? ???. ??? ???? ??? ??? ???? ?? ??? ??? ?? ???? ??? ?? ???? ?? ??? ???? ??? ? ????.

? ??? JUnit?? ?? ???? ????? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!