package com.atlassian.plugin.predicate;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.mockobjects.dynamic.Mock;
   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 ModuleOfClassPredicate}
   */
  public class TestModuleOfClassPredicate {
      private Predicate<ModuleDescriptor<StubModule>> moduleDescriptorPredicate;
  
      private Mock mockModuleDescriptor;
      private ModuleDescriptor<StubModule> moduleDescriptor;
  
      @Before
      public void setUp() throws Exception {
          moduleDescriptorPredicate = new ModuleOfClassPredicate<>(StubModule.class);
  
          mockModuleDescriptor = new Mock(ModuleDescriptor.class);
          moduleDescriptor = (ModuleDescriptor<StubModule>) mockModuleDescriptor.proxy();
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testCannotCreateWithNullClass() {
          new ModuleOfClassPredicate<>(null);
      }
  
      @Test
      public void testMatchesModuleExtendingClass() {
          mockModuleDescriptor.matchAndReturn("getModuleClass", StubSubclassModule.class);
          assertTrue(moduleDescriptorPredicate.test(moduleDescriptor));
      }
  
      @Test
      public void testDoesNotMatchModuleNotExtendingClass() {
          mockModuleDescriptor.matchAndReturn("getModuleClass", Object.class);
          assertFalse(moduleDescriptorPredicate.test(moduleDescriptor));
      }
  
      private static class StubModule {
      }
  
      private static class StubSubclassModule extends StubModule {
      }
  }