[英]java: cannot find symbol symbol: class getLogger location: class org.slf4j.LoggerFactory
[英]java.lang.IllegalArgumentException: Cannot subclass final class class org.slf4j.LoggerFactory when mocking the logger
嘗試嘲笑記錄器時,出現上述異常。
我想驗證日志。
import javax.annotation.PostConstruct;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
public class MedSlaveImpl implements MedSlaveInt {
private static final Logger logger = LoggerFactory.getLogger(MedSlaveImpl.class);
@Override
public void enterMode() {
logger.info("muting the Manager");
}
}
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.verify;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.mockStatic;
import static org.powermock.api.mockito.PowerMockito.when;
import org.junit.After;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.powermock.modules.junit4.PowerMockRunner;
import uk.org.lidalia.slf4jtest.TestLoggerFactory;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({ "/context-test.xml", "/context.xml" })
@TestPropertySource("/config.properties")
@ActiveProfiles("mediator")
@PrepareForTest({ MedSlaveImpl.class, LoggerFactory.class })
public class MedModeTest {
// For mediator
@Test
public void testStartService() throws Exception {
mockStatic(LoggerFactory.class);
Logger logger = mock(Logger.class);
when(LoggerFactory.getLogger(any(Class.class))).thenReturn(logger);
// TestLogger logger =
// TestLoggerFactory.getTestLogger(MedSlaveImpl.class);
mediatorImpl.enterMode();
verify(logger).info("muting the Manager");
// assertThat(logger.getLoggingEvents(),is(asList(info("muting theManager"))));
}
@After
public void clearLoggers() {
TestLoggerFactory.clear();
}
}
我花了整整一天時間以不同的方式來驗證日志。 喜歡使用
TestLogger記錄器Mockitto powermock。 最終我以不同的例外告終。
對於當前的方法,我遇到了上述例外情況。
建議非常感謝。感謝您的提前幫助
您有兩種選擇。 一種是遵循Darren的建議並捕獲記錄的輸出並進行檢查。 另一個是提供您自己的LoggerFactory來生成您喜歡的記錄器。 請注意,SFL4J是API,因此是可行的。 但是,這似乎是您要完成的工作很多。
無需嘲笑記錄器工廠的解決方案。
有一種延遲加載記錄器的方法:
public class MedSlaveImpl implements MedSlaveInt {
private static Logger logger;
// Package visible to override it in the tests.
Logger getLogger() {
if (logger == null) {
logger = LoggerFactory.getLogger(MedSlaveImpl.class);
}
return logger;
}
@Override
public void enterMode() {
// All calls to the logger via getLogger() method.
getLogger().info("muting the Manager");
}
}
您的測試具有服務類的實例,該實例具有重寫的getLogger()
方法:
@Test
public void testStartService() throws Exception {
//Setup
final Logger mockedLogger = mock(Logger.class);
final MedSlaveImpl service = new MedSlaveImpl() {
@Override
Logger getLogger() {
return mockedLogger;
}
}
// When
service.enterMode();
// Then
verify(mockedLogger).info("muting the Manager");
}
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