content: /*
   * Copyright (C) 2011 Clearspring Technologies, Inc. 
   *
   * 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 com.clearspring.analytics.stream;
  
  import java.util.List;
  
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  
  public class TestSampleSet {
  
      private SampleSet<String> set;
      private String[] e;
  
      /**
       * @throws java.lang.Exception
       */
      @Before
      public void setUp() throws Exception {
          set = new SampleSet<String>();
  
          e = new String[3];
          for (int i = 0; i < e.length; i++) {
              e[i] = "Element_" + i;
          }
      }
  
  
      @Test
      public void testPeekK() {
          set.put(e[0]);
          for (int i = 0; i < 2; i++) {
              set.put(e[1]);
          }
  
          for (int i = 0; i < 3; i++) {
              set.put(e[2]);
          }
  
          List<String> top = null;
          // Negative
          boolean caught = false;
          try {
              top = set.peek(-1);
          } catch (IllegalArgumentException e) {
              caught = true;
          }
          assertTrue(caught);
  
          // 0
          top = set.peek(0);
          assertEquals(0, top.size());
  
          // 1
          top = set.peek(1);
          assertEquals(1, top.size());
          assertEquals(set.peek(), top.get(0));
  
          // 2 (more than one but less than size)
          top = set.peek(2);
          assertEquals(2, top.size());
          for (int i = 0; i < 2; i++) {
              assertEquals(e[2 - i], top.get(i));
          }
  
          // 3 (size)
          top = set.peek(3);
          assertEquals(3, top.size());
          for (int i = 0; i < 3; i++) {
              assertEquals(e[2 - i], top.get(i));
          }
  
          // 4 (more than size)
          top = set.peek(4);
          assertEquals(3, top.size());
          for (int i = 0; i < 3; i++) {
              assertEquals(e[2 - i], top.get(i));
          }
      }
  
      @Test
      public void testPut() {
          // Empty set
          assertEquals(1L, set.put(e[0]));
          assertEquals(e[0], set.peek());
          assertEquals(e[0], ((SampleSet<String>) set).peekMin());
      }
  
      @Test
      public void testPutWithIncrement() {
          // Empty set
          assertEquals(10L, set.put(e[0], 10));
          assertEquals(e[0], set.peek());
          assertEquals(e[0], ((SampleSet<String>) set).peekMin());
  
      }
  
      @Test
      public void testRemoveMin() {
          // Empty set
          assertNull(set.removeMin());
          assertEquals(0, set.size());
          assertEquals(0L, set.count());
  
          // Maintaining order        
          set.put(e[0]);
          for (int i = 0; i < 2; i++) {
              set.put(e[1]);
          }
  
          for (int i = 0; i < 3; i++) {
              set.put(e[2]);
          }
  
          assertEquals(3, set.size());
          assertEquals(6L, set.count());
  
          assertEquals(e[0], set.removeMin());
          assertEquals(2, set.size());
          assertEquals(5L, set.count());
  
          assertEquals(e[1], set.removeMin());
          assertEquals(1, set.size());
          assertEquals(3L, set.count());
  
          assertEquals(e[2], set.removeMin());
          assertEquals(0, set.size());
          assertEquals(0L, set.count());
  
          assertEquals(null, set.removeMin());
          assertEquals(0, set.size());
          assertEquals(0L, set.count());
      }
  }
  