text: /*
   * 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.
   */
  
  #include "nffs_test_utils.h"
  
  TEST_CASE(nffs_test_cache_large_file)
  {
      static char data[NFFS_BLOCK_MAX_DATA_SZ_MAX * 5];
      struct fs_file *file;
      uint8_t b;
      int rc;
  
      /*** Setup. */
      rc = nffs_format(nffs_current_area_descs);
      TEST_ASSERT(rc == 0);
  
      nffs_test_util_create_file("/myfile.txt", data, sizeof data);
      nffs_cache_clear();
  
      /* Opening a file should not cause any blocks to get cached. */
      rc = fs_open("/myfile.txt", FS_ACCESS_READ, &file);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt", 0, 0);
  
      /* Cache first block. */
      rc = fs_seek(file, nffs_block_max_data_sz * 0);
      TEST_ASSERT(rc == 0);
      rc = fs_read(file, 1, &b, NULL);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt",
                                       nffs_block_max_data_sz * 0,
                                       nffs_block_max_data_sz * 1);
  
      /* Cache second block. */
      rc = fs_seek(file, nffs_block_max_data_sz * 1);
      TEST_ASSERT(rc == 0);
      rc = fs_read(file, 1, &b, NULL);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt",
                                       nffs_block_max_data_sz * 0,
                                       nffs_block_max_data_sz * 2);
  
  
      /* Cache fourth block; prior cache should get erased. */
      rc = fs_seek(file, nffs_block_max_data_sz * 3);
      TEST_ASSERT(rc == 0);
      rc = fs_read(file, 1, &b, NULL);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt",
                                       nffs_block_max_data_sz * 3,
                                       nffs_block_max_data_sz * 4);
  
      /* Cache second and third blocks. */
      rc = fs_seek(file, nffs_block_max_data_sz * 1);
      TEST_ASSERT(rc == 0);
      rc = fs_read(file, 1, &b, NULL);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt",
                                       nffs_block_max_data_sz * 1,
                                       nffs_block_max_data_sz * 4);
  
      /* Cache fifth block. */
      rc = fs_seek(file, nffs_block_max_data_sz * 4);
      TEST_ASSERT(rc == 0);
      rc = fs_read(file, 1, &b, NULL);
      TEST_ASSERT(rc == 0);
      nffs_test_util_assert_cache_range("/myfile.txt",
                                       nffs_block_max_data_sz * 1,
                                       nffs_block_max_data_sz * 5);
  
      rc = fs_close(file);
      TEST_ASSERT(rc == 0);
  }
  