package com.atlassian.sal.core.component;
   
   import com.atlassian.sal.api.component.ComponentLocator;
   import org.junit.Test;
   
   import java.util.Collection;
   import java.util.HashMap;
   import java.util.Optional;
   
  import static org.junit.Assert.assertEquals;
  
  public class TestComponentLocator {
  
      @Test
      public void testConvertClassToName() {
          MockComponentLocator loc = new MockComponentLocator();
          assertEquals("string", loc.convertClassToName(String.class));
          assertEquals("hashMap", loc.convertClassToName(HashMap.class));
      }
  
      private static class MockComponentLocator extends ComponentLocator {
  
          protected <T> T getComponentInternal(Class<T> iface) {
              return null;
          }
  
          @Override
          protected <T> Collection<T> getComponentsInternal(Class<T> iface) {
              return null;
          }
  
          @Override
          protected <T> T getComponentInternal(Class<T> iface, String componentId) {
              return null;
          }
  
          @Override
          protected String convertClassToName(Class cls) {
              return super.convertClassToName(cls);
          }
      }
  
      public void testGetComponentSafelyNotInitialised() {
          assertEquals(ComponentLocator.getComponentSafely(String.class), Optional.empty());
      }
  
      public void testGetComponentSafelyEmptyContainer() {
          ComponentLocator.setComponentLocator(new MockComponentLocator());
          assertEquals(ComponentLocator.getComponentSafely(String.class), Optional.empty());
      }
  }