content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.beam.sdk.io.range;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.greaterThanOrEqualTo;
  
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameter;
  import org.junit.runners.Parameterized.Parameters;
  
  /** A combinatorial test of {@link ByteKeyRange#estimateFractionForKey(ByteKey)}. */
  @RunWith(Parameterized.class)
  public class ByteKeyRangeEstimateFractionTest {
    private static final ByteKey[] TEST_KEYS = ByteKeyRangeTest.RANGE_TEST_KEYS;
  
    @Parameters(name = "{index}: i={0}, k={1}")
    public static Iterable<Object[]> data() {
      ImmutableList.Builder<Object[]> ret = ImmutableList.builder();
      for (int i = 0; i < TEST_KEYS.length; ++i) {
        for (int k = i + 1; k < TEST_KEYS.length; ++k) {
          ret.add(new Object[] {i, k});
        }
      }
      return ret.build();
    }
  
    @Parameter(0)
    public int i;
  
    @Parameter(1)
    public int k;
  
    @Test
    public void testEstimateFractionForKey() {
      double last = 0.0;
      ByteKeyRange range = ByteKeyRange.of(TEST_KEYS[i], TEST_KEYS[k]);
      for (int j = i; j < k; ++j) {
        ByteKey key = TEST_KEYS[j];
        if (key.isEmpty()) {
          // Cannot compute progress for unspecified key
          continue;
        }
        double fraction = range.estimateFractionForKey(key);
        assertThat(fraction, greaterThanOrEqualTo(last));
        last = fraction;
      }
    }
  }
  