package com.atlassian.plugins.rest.common.expand.resolver;
   
   import com.atlassian.plugins.rest.common.expand.ExpandConstraint;
   import com.atlassian.plugins.rest.common.expand.parameter.Indexes;
   
   import static org.junit.Assert.*;
   
   import org.junit.Before;
   import org.junit.Test;
  
  /**
   * Testing {@link ExpandConstraintEntityExpanderResolver}
   */
  public class ExpandConstraintEntityExpanderResolverTest {
      private ExpandConstraintEntityExpanderResolver resolver;
  
      @Before
      public void setUp() throws Exception {
          resolver = new ExpandConstraintEntityExpanderResolver();
      }
  
      @Test
      public void testHasExpanderWithNullClass() {
          try {
              final Class clazz = null;
              resolver.hasExpander(clazz);
              fail();
          } catch (NullPointerException e) {
              // expected
          }
      }
  
      @Test
      public void testGetExpanderWithNullClass() {
          try {
              final Class clazz = null;
              resolver.getExpander(clazz);
              fail();
          } catch (NullPointerException e) {
              // expected
          }
      }
  
      @Test
      public void testHasExpanderWithClassForObjectWithNoConstraintMethod() {
          assertFalse(resolver.hasExpander(Object.class));
      }
  
      @Test
      public void testGetExpanderWithClassForObjectWithNoConstraintMethod() {
          assertNull(resolver.getExpander(Object.class));
      }
  
      @Test
      public void testHasExpanderWithClassForClassWithConstraintMethod() {
          assertTrue(resolver.hasExpander(ClassWithConstraintMethod.class));
      }
  
      @Test
      public void testGetExpanderWithClassForClassWithConstraintMethod() {
          assertNotNull(resolver.getExpander(ClassWithConstraintMethod.class));
      }
  
      public static class ClassWithConstraintMethod {
          @ExpandConstraint
          public void expand(Indexes indexes) {
          }
      }
  }