AssignmentsTest.java

/*
 * Copyright 2015 S. Webber
 * 
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
 * 
 * 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.oakgp;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.fail;
import static org.oakgp.Assignments.createAssignments;

import org.junit.Test;

public class AssignmentsTest {
   @Test
   public void test() {
      int x = 9;
      int y = 7;
      Object[] values = { x, y };
      Assignments assignments = createAssignments(values);
      assertEquals(x, assignments.get(0));
      assertEquals(y, assignments.get(1));

      // assert Assignments remains unchanged by subsequent changes to values
      values[0] = 10;
      assertEquals(x, assignments.get(0));
      assertEquals(y, assignments.get(1));

      assertArrayIndexOutOfBoundsException(assignments, -1);
      assertArrayIndexOutOfBoundsException(assignments, 2);
   }

   @Test
   public void testEqualsAndHashCode() {
      Assignments a1 = createAssignments("hello", true, 42);
      Assignments a2 = createAssignments("hello", true, 42);
      assertEquals(a1, a1);
      assertEquals(a1.hashCode(), a2.hashCode());
      assertEquals(a1, a2);
   }

   @Test
   public void testNotEquals() {
      Assignments a = createAssignments("hello", true, 42);

      // same arguments, different order
      assertNotEquals(a, createAssignments(42, true, "hello"));

      // different arguments
      assertNotEquals(a, createAssignments("hello", true, 43));

      // one fewer argument
      assertNotEquals(a, createAssignments("hello", true));

      // one extra argument
      assertNotEquals(a, createAssignments("hello", true, 42, 42));
   }

   @Test
   public void testToString() {
      Assignments assignments = createAssignments("hello", true, 42);
      assertEquals("[hello, true, 42]", assignments.toString());
   }

   private void assertArrayIndexOutOfBoundsException(Assignments assignments, int index) {
      try {
         assignments.get(index);
         fail();
      } catch (ArrayIndexOutOfBoundsException e) {
         // expected
      }
   }
}