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  package org.apache.cayenne.map;
  
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.ExpressionFactory;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.apache.cayenne.util.CayenneMapEntry;
  import org.apache.cayenne.util.Util;
  import org.junit.Test;
  
  import java.util.Collection;
  import java.util.Iterator;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertSame;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class EntityIT extends RuntimeCase {
  
      @Inject
      private CayenneRuntime runtime;
  
      @Test
      public void testSerializability() throws Exception {
          MockEntity entity = new MockEntity("entity");
  
          MockEntity d1 = Util.cloneViaSerialization(entity);
          assertEquals(entity.getName(), d1.getName());
  
          entity.addAttribute(new MockAttribute("abc"));
          entity.addRelationship(new MockRelationship("xyz"));
          MockEntity d2 = Util.cloneViaSerialization(entity);
          assertNotNull(d2.getAttribute("abc"));
  
          // test that ref collection wrappers are still working
          assertNotNull(d2.getAttributes());
          assertEquals(entity.getAttributes().size(), d2.getAttributes().size());
          assertTrue(d2.getAttributes().contains(d2.getAttribute("abc")));
  
          assertNotNull(d2.getRelationships());
          assertEquals(entity.getRelationships().size(), d2.getRelationships().size());
          assertTrue(d2.getRelationships().contains(d2.getRelationship("xyz")));
  
          assertNotNull(d2.getAttributeMap());
          assertEquals(entity.getAttributes().size(), d2.getAttributeMap().size());
          assertSame(d2.getAttribute("abc"), d2.getAttributeMap().get("abc"));
  
          assertNotNull(d2.getRelationshipMap());
          assertEquals(entity.getRelationships().size(), d2.getRelationshipMap().size());
          assertSame(d2.getRelationship("xyz"), d2.getRelationshipMap().get("xyz"));
      }
  
      @Test
      public void testName() {
          MockEntity entity = new MockEntity();
          String tstName = "tst_name";
          entity.setName(tstName);
          assertEquals(tstName, entity.getName());
      }
  
      @Test
      public void testAttribute() {
          MockEntity entity = new MockEntity();
          MockAttribute attribute = new MockAttribute("tst_name");
  
          entity.addAttribute(attribute);
          assertSame(attribute, entity.getAttribute(attribute.getName()));
  
          // attribute must have its entity switched to our entity.
          assertSame(entity, attribute.getEntity());
  
          // remove attribute
          entity.removeAttribute(attribute.getName());
          assertNull(entity.getAttribute(attribute.getName()));
      }
  
      @Test
      public void testRelationship() {
          MockEntity entity = new MockEntity();
          MockRelationship rel = new MockRelationship("tst_name");
  
          entity.addRelationship(rel);
          assertSame(rel, entity.getRelationship(rel.getName()));
  
          // attribute must have its entity switched to our entity.
          assertSame(entity, rel.getSourceEntity());
  
          // remove attribute
          entity.removeRelationship(rel.getName());
          assertNull(entity.getRelationship(rel.getName()));
      }
  
      @Test
      public void testAttributeClashWithRelationship() {
          MockEntity entity = new MockEntity();
          MockRelationship rel = new MockRelationship("tst_name");
  
          entity.addRelationship(rel);
  
          try {
              MockAttribute attribute = new MockAttribute("tst_name");
              entity.addAttribute(attribute);
  
              fail("Exception should have been thrown due to clashing attribute and relationship names.");
          } catch (Exception e) {
              // Exception expected.
          }
      }
  
      @Test
      public void testRelationshipClashWithAttribute() {
          MockEntity entity = new MockEntity();
          MockAttribute attribute = new MockAttribute("tst_name");
  
          entity.addAttribute(attribute);
  
          try {
              MockRelationship rel = new MockRelationship("tst_name");
              entity.addRelationship(rel);
  
              fail("Exception should have been thrown due to clashing attribute and relationship names.");
          } catch (Exception e) {
              // Exception expected.
          }
      }
  
      @Test
      public void testResolveBadObjPath1() {
          // test invalid expression path
          Expression pathExpr = ExpressionFactory.expressionOfType(Expression.OBJ_PATH);
          pathExpr.setOperand(0, "invalid.invalid");
  
          // itertator should be returned, but when trying to read 1st component,
          // it should throw an exception....
          ObjEntity galleryEnt = runtime.getDataDomain().getEntityResolver().getObjEntity("Gallery");
          Iterator<CayenneMapEntry> it = galleryEnt.resolvePathComponents(pathExpr);
          assertTrue(it.hasNext());
  
          try {
              it.next();
              fail();
          } catch (Exception ex) {
              // exception expected
          }
      }
  
      @Test
      public void testResolveBadObjPath2() {
          // test invalid expression type
          Expression badPathExpr = ExpressionFactory.expressionOfType(Expression.IN);
          badPathExpr.setOperand(0, "a.b.c");
          ObjEntity galleryEnt = runtime.getDataDomain().getEntityResolver().getObjEntity("Gallery");
  
          try {
              galleryEnt.resolvePathComponents(badPathExpr);
              fail();
          } catch (Exception ex) {
              // exception expected
          }
      }
  
      @Test
      public void testResolveObjPath1() {
          Expression pathExpr = ExpressionFactory.expressionOfType(Expression.OBJ_PATH);
          pathExpr.setOperand(0, "galleryName");
  
          ObjEntity galleryEnt = runtime.getDataDomain().getEntityResolver().getObjEntity("Gallery");
          Iterator<CayenneMapEntry> it = galleryEnt.resolvePathComponents(pathExpr);
  
          // iterator must contain a single ObjAttribute
          assertNotNull(it);
          assertTrue(it.hasNext());
          ObjAttribute next = (ObjAttribute) it.next();
          assertNotNull(next);
          assertFalse(it.hasNext());
          assertSame(galleryEnt.getAttribute("galleryName"), next);
      }
  
      @Test
      public void testRemoveAttribute() {
          MockEntity entity = new MockEntity();
  
          entity.setName("test");
          MockAttribute attribute1 = new MockAttribute("a1");
          MockAttribute attribute2 = new MockAttribute("a2");
  
          entity.addAttribute(attribute1);
          entity.addAttribute(attribute2);
  
          Collection<MockAttribute> attributes = entity.getAttributes();
          assertEquals(2, attributes.size());
  
          entity.removeAttribute("a1");
          attributes = entity.getAttributes();
          assertEquals(1, attributes.size());
      }
  }
  