content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.csp.sentinel.logging.slf4j;
  
  import uk.org.lidalia.slf4jext.Level;
  import uk.org.lidalia.slf4jtest.TestLoggerFactory;
  
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import static org.mockito.Mockito.*;
  
  import java.io.PrintStream;
  
  /**
   * @author xue8
   * @author jason
   */
  public abstract class AbstraceSlf4jLogTest {
      private static final class TestException extends Exception {
          private static final long serialVersionUID = 1L;
          
      }
      PrintStream mockStream;
      PrintStream oldOutStream;
      PrintStream oldErrStream;
      
      protected abstract String getLoggerName();
      protected abstract void debug(String msg, Object... args);
      protected abstract void trace(String msg, Object... args);
      protected abstract void info(String msg, Object... args);
      protected abstract void warn(String msg, Object... args);
      protected abstract void error(String msg, Object... args);
      
      @Before
      public void mockOutput() {
          System.out.println("Try to mock System.out and System.err");
          mockStream = mock(PrintStream.class);
          oldOutStream = System.out;
          oldOutStream = System.out;
          System.setOut(mockStream);
          System.setErr(mockStream);
          TestLoggerFactory.getInstance().setPrintLevel(Level.TRACE);
      }
      
      @After
      public void restore() {
          if (oldOutStream != null) {
              System.setOut(oldOutStream);
              System.setErr(oldErrStream);
              oldOutStream = null;
              oldErrStream = null;
              System.out.println("Restore System.out and System.err");
          }
      }
  
      @Test
      public void testRecordLog() {
          info("init");
          verify(mockStream).println(contains("init"));
          clearInvocations(mockStream);
          int count = 0;
  
          // info test
          while (count < 1000) { // 0~999
              info("Count {}.", count);
              count ++;
          }
          verify(mockStream).println(contains("Count 0."));
          verify(mockStream).println(contains("Count 1."));
          verify(mockStream).println(contains("Count 99."));
          verify(mockStream).println(contains("Count 123."));
          verify(mockStream).println(contains("Count 888."));
          verify(mockStream).println(contains("Count 999."));
          verify(mockStream, times(1000)).println(contains(" INFO "));
          verify(mockStream, times(1000)).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // warn test
          while (count < 2000) { // 1000~1999
              warn("Count {}.", count);
              count ++;
          }
          verify(mockStream).println(contains("Count 1000."));
          verify(mockStream).println(contains("Count 1223."));
          verify(mockStream).println(contains("Count 1888."));
          verify(mockStream).println(contains("Count 1999."));
          verify(mockStream, times(1000)).println(contains(" WARN "));
          verify(mockStream, times(1000)).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // trace test
          while (count < 3000) { // 2000~2999
              trace("Count {}.", count);
              count ++;
          }
          verify(mockStream).println(contains("Count 2000."));
          verify(mockStream).println(contains("Count 2999."));
          verify(mockStream, times(1000)).println(contains(" TRACE "));
          verify(mockStream, times(1000)).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // debug test
          while (count < 4000) { // 3000~3999
              debug("Count {}.", count);
              count ++;
          }
          verify(mockStream).println(contains("Count 3000."));
          verify(mockStream).println(contains("Count 3999."));
          verify(mockStream, times(1000)).println(contains(" DEBUG "));
          verify(mockStream, times(1000)).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // test error
          while (count < 5000) { // 4000~4999
              error("Count {}.", count);
              count ++;
          }
          verify(mockStream).println(contains("Count 4000."));
          verify(mockStream).println(contains("Count 4999."));
          verify(mockStream, times(1000)).println(contains(" ERROR "));
          verify(mockStream, times(1000)).println(contains(getLoggerName()));
          clearInvocations(mockStream);
      }
  
  
      @Test
      public void testLogException() {
          info("init");
          verify(mockStream).println(contains("init"));
          verify(mockStream, atLeastOnce()).println(contains(getLoggerName()));
          clearInvocations(mockStream);
          
          Exception e = new TestException();
  
          // info test
          info("some log", e);
          verify(mockStream).println(contains("INFO"));
          verify(mockStream).println(isA(TestException.class));
          verify(mockStream).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // warn test
          warn("some log", e);
          verify(mockStream).println(contains("WARN"));
          verify(mockStream).println(isA(TestException.class));
          verify(mockStream).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // trace test
          trace("some log", e);
          verify(mockStream).println(contains("TRACE"));
          verify(mockStream).println(isA(TestException.class));
          verify(mockStream).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // debug test
          debug("some log", e);
          verify(mockStream).println(contains("DEBUG"));
          verify(mockStream).println(isA(TestException.class));
          verify(mockStream).println(contains(getLoggerName()));
          clearInvocations(mockStream);
  
          // error test
          error("some log", e);
          verify(mockStream).println(contains("ERROR"));
          verify(mockStream).println(isA(TestException.class));
          verify(mockStream).println(contains(getLoggerName()));
          clearInvocations(mockStream);
      }
  }
  