package com.atlassian.plugin.predicate;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.atlassian.plugin.descriptors.AbstractModuleDescriptor;
   import com.atlassian.plugin.descriptors.MockUnusedModuleDescriptor;
   import com.atlassian.plugin.module.ModuleFactory;
   import org.junit.Before;
   import org.junit.Test;
   
  import java.util.function.Predicate;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Testing {@link ModuleDescriptorOfClassPredicate}
   */
  public class TestModuleDescriptorOfClassPredicate {
  
      private Predicate<ModuleDescriptor<?>> moduleDescriptorPredicate;
  
      @Before
      public void setUp() throws Exception {
          moduleDescriptorPredicate = new ModuleDescriptorOfClassPredicate(ModuleDescriptorStubA.class);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testCannotCreateWithNullModuleDescritptorClassesArray() {
          new ModuleDescriptorOfClassPredicate((Class[]) null);
      }
  
      @Test
      public void testMatchesModuleWithModuleDescriptorClassExactlyMatchingClass() {
          assertTrue(moduleDescriptorPredicate.test(new ModuleDescriptorStubA()));
      }
  
      @Test
      public void testDoesNotMatchModuleWithModuleDescriptorClassExtendingButNotExactlyMatchingClass() {
          assertTrue(moduleDescriptorPredicate.test(new ModuleDescriptorStubB()));
      }
  
      @Test
      public void testDoesNotMatchModuleWithModuleDescriptorClassNotMatchingClass() {
          assertFalse(moduleDescriptorPredicate.test(new MockUnusedModuleDescriptor()));
      }
  
      private static class ModuleDescriptorStubA extends AbstractModuleDescriptor {
          ModuleDescriptorStubA() {
              super(ModuleFactory.LEGACY_MODULE_FACTORY);
          }
  
          public Object getModule() {
              return null;
          }
      }
  
      private static class ModuleDescriptorStubB extends ModuleDescriptorStubA {
      }
  }