content: package com.alibaba.csp.sentinel.adapter.dubbo;
  
  import com.alibaba.dubbo.rpc.Invocation;
  import org.junit.Test;
  
  import java.util.HashMap;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  import static org.mockito.Mockito.*;
  
  /**
   * @author cdfive
   */
  public class DubboUtilsTest {
  
      @Test
      public void testGetApplication() {
          Invocation invocation = mock(Invocation.class);
          when(invocation.getAttachments()).thenReturn(new HashMap<String, String>());
          when(invocation.getAttachment(DubboUtils.DUBBO_APPLICATION_KEY, "")).thenReturn("consumerA");
  
          String application = DubboUtils.getApplication(invocation, "");
          verify(invocation).getAttachment(DubboUtils.DUBBO_APPLICATION_KEY, "");
  
          assertEquals("consumerA", application);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testGetApplicationNoAttachments() {
          Invocation invocation = mock(Invocation.class);
          when(invocation.getAttachments()).thenReturn(null);
          when(invocation.getAttachment(DubboUtils.DUBBO_APPLICATION_KEY, "")).thenReturn("consumerA");
  
          DubboUtils.getApplication(invocation, "");
  
          fail("No attachments in invocation, IllegalArgumentException should be thrown!");
      }
  }
  