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 com.datastax.oss.driver.api.core.paging;
  
  import com.datastax.oss.driver.TestDataProviders;
  import com.tngtech.java.junit.dataprovider.DataProvider;
  import com.tngtech.java.junit.dataprovider.DataProviderRunner;
  import com.tngtech.java.junit.dataprovider.UseDataProvider;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  @RunWith(DataProviderRunner.class)
  public abstract class OffsetPagerTestBase {
  
    /**
     * The fetch size only matters for the async implementation. For sync this will essentially run
     * the same fixture 4 times, but that's not a problem because tests are fast.
     */
    @DataProvider
    public static Object[][] fetchSizes() {
      return TestDataProviders.fromList(1, 2, 3, 100);
    }
  
    @DataProvider
    public static Object[][] scenarios() {
      Object[][] fixtures =
          TestDataProviders.fromList(
              // ------- inputs -------- | ------ expected -------
              // iterable  | page | size | page | contents | last?
              "a,b,c,d,e,f | 1    | 3    | 1    | a,b,c    | false",
              "a,b,c,d,e,f | 2    | 3    | 2    | d,e,f    | true",
              "a,b,c,d,e,f | 2    | 4    | 2    | e,f      | true",
              "a,b,c,d,e,f | 2    | 5    | 2    | f        | true",
              "a,b,c       | 1    | 3    | 1    | a,b,c    | true",
              "a,b         | 1    | 3    | 1    | a,b      | true",
              "a           | 1    | 3    | 1    | a        | true",
              // Empty iterator => return one empty page
              "            | 1    | 3    | 1    |          | true",
              // Past the end => return last page
              "a,b,c,d,e,f | 3    | 3    | 2    | d,e,f    | true",
              "a,b,c,d,e   | 3    | 3    | 2    | d,e      | true");
      return TestDataProviders.combine(fixtures, fetchSizes());
    }
  
    @Test
    @UseDataProvider("scenarios")
    public void should_return_existing_page(String fixtureSpec, int fetchSize) {
      OffsetPagerTestFixture fixture = new OffsetPagerTestFixture(fixtureSpec);
      OffsetPager pager = new OffsetPager(fixture.getPageSize());
      OffsetPager.Page<String> actualPage = getActualPage(pager, fixture, fetchSize);
      fixture.assertMatches(actualPage);
    }
  
    protected abstract OffsetPager.Page<String> getActualPage(
        OffsetPager pager, OffsetPagerTestFixture fixture, int fetchSize);
  }
  