/**
    * Copyright 2005-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.krms.framework.engine.expression;
  
  import java.math.BigInteger;
  
  import org.junit.Test;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  /**
   *
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  
  public class ComparisonOperatorTest {
      @Test
      public void testEquals() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.EQUALS.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertTrue(op.compare("StringOne", "StringOne"));
          assertTrue(op.compare(123, "123"));
          assertTrue(op.compare(BigInteger.TEN, "10"));
  //        assertFalse(op.compare(11, "elf"));  // throws:
  // org.kuali.rice.krms.api.engine.IncompatibleTypeException: Could not coerce String to Integer = -> Type should have been one of [java.lang.Integer] but was java.lang.String
  //        at org.kuali.rice.krms.framework.engine.expression.ComparisonOperator.coerceRhsHelper
  //        at org.kuali.rice.krms.framework.engine.expression.ComparisonOperator.coerceRhs
  //        at org.kuali.rice.krms.framework.engine.expression.ComparisonOperator.compare
      }
  
      @Test
      public void testNotEquals() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.NOT_EQUALS.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertTrue(op.compare("StringOne", "StringTwo"));
          assertTrue(op.compare(122, "123"));
          assertTrue(op.compare(BigInteger.TEN, "11"));
          assertTrue(op.compare(null, "124"));
          assertFalse(op.compare(null, null));
      }
  
      @Test
      public void testLess() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.LESS_THAN.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertTrue(op.compare(123, "124"));
          assertTrue(op.compare(new Double(123.2), "124"));
          assertTrue(op.compare(null, "124"));
          assertFalse(op.compare(124, null));
          assertFalse(op.compare(null, null));
          assertFalse(op.compare(123, "123"));
          assertFalse(op.compare(new Integer(123), "122"));
          assertFalse(op.compare(122.1, "122"));
      }
  
      @Test
      public void testLessThanEqual() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.LESS_THAN_EQUAL.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertTrue(op.compare(123, "124"));
          assertTrue(op.compare(123.1, "123.1"));
          assertTrue(op.compare(null, null));
          assertFalse(op.compare(new Double(123.1), "123.01"));
          assertFalse(op.compare(123, "122"));
      }
  
      @Test
      public void testGreaterThanEqual() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.GREATER_THAN_EQUAL.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertFalse(op.compare(123, "124"));
          assertTrue(op.compare(123.1, "123.1"));
          assertFalse(op.compare(null, "124"));
          assertTrue(op.compare(124, null));
          assertTrue(op.compare(null, null));
          assertTrue(op.compare(new Double(123.1), "123.01"));
          assertTrue(op.compare(123, "122"));
      }
  
  
      @Test
      public void testExists() {
          ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.EXISTS.toString());
          op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
          assertTrue(op.compare("123", "0"));
         assertFalse(op.compare("123", null));
     }
 
     @Test
     public void testDoesNotExists() {
         ComparisonOperator op = ComparisonOperator.fromCode(ComparisonOperator.DOES_NOT_EXIST.toString());
         op.setComparisonOperatorService(ComparisonOperatorServiceImpl.getInstance());
         assertFalse(op.compare("123", "0"));
         assertTrue(op.compare("123", null));
     }
 }