[#1135] Head the last near-limit column of backendstat show-index-status 80...

Valery Kharseko

14 hours ago 8c75bb517a6687a9e91389dafaf895f09927aa01

 opendj-server-legacy/src/test/java/org/opends/server/backends/pluggable/BackendStatTest.java

@@ -16,6 +16,7 @@
package org.opends.server.backends.pluggable;

import static org.assertj.core.api.Assertions.*;
import static org.opends.server.backends.pluggable.BackendStat.*;

import org.opends.server.DirectoryServerTestCase;
import org.testng.annotations.Test;
@@ -29,15 +30,56 @@
  @Test
  public void testAKeyIsNearItsLimitFromEightyPercentOn()
  {
    assertThat(BackendStat.nearLimit(79, 100)).isFalse();
    assertThat(BackendStat.nearLimit(80, 100)).isTrue();
    assertThat(nearLimitColumn(79, 100)).isEqualTo(-1);
    assertThat(nearLimitColumn(80, 100)).isNotEqualTo(-1);
  }

  /** An index-entry-limit of 0 is no limit at all, and no key is near it (#1059). */
  @Test
  public void testNoKeyIsNearNoLimit()
  {
    assertThat(BackendStat.nearLimit(1, 0)).isFalse();
    assertThat(BackendStat.nearLimit(Integer.MAX_VALUE, 0)).isFalse();
    assertThat(nearLimitColumn(1, 0)).isEqualTo(-1);
    assertThat(nearLimitColumn(Integer.MAX_VALUE, 0)).isEqualTo(-1);
  }

  /** The columns are headed 95%, 90% and 80%: the last one counts keys from 80% of the limit (#1135). */
  @Test
  public void testTheColumnsAreHeadedByTheirThresholds()
  {
    assertThat(NEAR_LIMIT_PERCENTS).containsExactly(95, 90, 80);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(80, 100)]).isEqualTo(80);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(89, 100)]).isEqualTo(80);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(90, 100)]).isEqualTo(90);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(94, 100)]).isEqualTo(90);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(95, 100)]).isEqualTo(95);
    assertThat(NEAR_LIMIT_PERCENTS[nearLimitColumn(100, 100)]).isEqualTo(95);
  }

  /**
   * Every key a column counts holds at least the percentage of the limit that heads the column, and
   * less than the percentage heading the column before it.
   */
  @Test
  public void testEachColumnCountsTheKeysFromItsHeadingUpToThePreviousOne()
  {
    for (long entryLimit : new long[] { 1, 7, 100, 4000, 4001 })
    {
      for (long size = 0; size <= entryLimit; size++)
      {
        int column = nearLimitColumn(size, entryLimit);
        boolean nearLimit = size * 100 >= entryLimit * NEAR_LIMIT_PERCENTS[NEAR_LIMIT_PERCENTS.length - 1];
        assertThat(column >= 0).as("size %d of %d", size, entryLimit).isEqualTo(nearLimit);
        if (column >= 0)
        {
          assertThat(size * 100).as("size %d of %d", size, entryLimit)
              .isGreaterThanOrEqualTo(entryLimit * NEAR_LIMIT_PERCENTS[column]);
          if (column > 0)
          {
            assertThat(size * 100).as("size %d of %d", size, entryLimit)
                .isLessThan(entryLimit * NEAR_LIMIT_PERCENTS[column - 1]);
          }
        }
      }
    }
  }
}