content: /**
   * 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.apache.aurora.common.stats;
  
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.junit.After;
  import org.junit.Test;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotSame;
  import static org.junit.Assert.assertThat;
  
  /**
   * @author William Farner
   */
  public class StatsTest {
  
    @After
    public void tearDown() {
      Stats.flush();
    }
  
    @Test
    public void testSimpleExport() {
      AtomicLong var = Stats.exportLong("test_long");
      assertCounter("test_long", 0);
      var.incrementAndGet();
      assertCounter("test_long", 1);
      var.addAndGet(100);
      assertCounter("test_long", 101);
    }
  
    @Test
    public void testSupportedSpecialChars() {
      AtomicLong hyphen = Stats.exportLong("c-d");
      AtomicLong slash = Stats.exportLong("d/f");
      AtomicLong dot = Stats.exportLong("f.g");
  
      hyphen.incrementAndGet();
      slash.incrementAndGet();
      dot.incrementAndGet();
  
      assertCounter("c-d", 1);
      assertCounter("d/f", 1);
      assertCounter("f.g", 1);
    }
  
    @Test
    public void testNotSame() {
      AtomicLong firstExport = Stats.exportLong("somevar");
      firstExport.incrementAndGet();
      firstExport.incrementAndGet();
      assertCounter("somevar", 2L);
      AtomicLong secondExport = Stats.exportLong("somevar");
      assertNotSame(firstExport, secondExport);
      secondExport.incrementAndGet();
      assertCounter("somevar", 2L); // We keep the first one!
    }
  
    @Test
    public void testNormalizesSpace() {
      AtomicLong leading = Stats.exportLong("  leading space");
      AtomicLong trailing = Stats.exportLong("trailing space   ");
      AtomicLong surround = Stats.exportLong("   surround space   ");
  
      leading.incrementAndGet();
      trailing.incrementAndGet();
      surround.incrementAndGet();
      assertCounter("__leading_space", 1);
      assertCounter("trailing_space___", 1);
      assertCounter("___surround_space___", 1);
    }
  
    @Test
    public void testNormalizesIllegalChars() {
      AtomicLong colon = Stats.exportLong("a:b");
      AtomicLong plus = Stats.exportLong("b+c");
  
      colon.incrementAndGet();
      plus.incrementAndGet();
      assertCounter("a_b", 1);
      assertCounter("b_c", 1);
    }
  
    private void assertCounter(String name, long value) {
      assertThat(Stats.<Long>getVariable(name).read(), is(value));
    }
  
    private void assertCounter(String name, double value) {
      Double var = (Double) Stats.getVariable(name).read();
      assertEquals(var, value, 1e-6);
    }
  }
  
  