package com.atlassian.plugins.rest.module;
   
   import com.atlassian.plugin.osgi.factory.OsgiPlugin;
   import com.sun.jersey.api.core.ResourceConfig;
   
   import static org.junit.Assert.assertNotNull;
   import static org.junit.Assert.assertNull;
   
   import org.junit.Test;
  
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.util.Collections;
  import java.util.Set;
  
  public class OsgiComponentProviderFactoryTest {
      private OsgiComponentProviderFactory componentProviderFactory;
  
      private void initialiseComponentProviderFactory(Set<Class<?>> classes) {
          final ResourceConfig resourceConfig = mock(ResourceConfig.class);
          final OsgiPlugin plugin = mock(OsgiPlugin.class);
  
          when(resourceConfig.getClasses()).thenReturn(classes);
  
          componentProviderFactory = new OsgiComponentProviderFactory(resourceConfig, plugin);
      }
  
      @Test
      public void testGetComponentProviderWithNoResourceOrProviderClasses() {
          initialiseComponentProviderFactory(null);
  
          assertNull(componentProviderFactory.getComponentProvider(this.getClass()));
      }
  
      @Test
      public void testGetComponentProviderWithEmptyResourceOrProviderClasses() {
          initialiseComponentProviderFactory(Collections.<Class<?>>emptySet());
  
          assertNull(componentProviderFactory.getComponentProvider(this.getClass()));
      }
  
      @Test
      public void testGetComponentProviderWithAResourceOrProviderClasses() {
          initialiseComponentProviderFactory(Collections.<Class<?>>singleton(this.getClass()));
  
          assertNotNull(componentProviderFactory.getComponentProvider(this.getClass()));
          assertNull(componentProviderFactory.getComponentProvider(Object.class));
      }
  }