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.cassandra.sidecar.utils;
  
  import java.util.Objects;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.assertj.core.api.Assertions.assertThat;
  
  /**
   * Unit tests for {@link FileUtils}
   */
  class FileUtilsTest
  {
      @Test
      void testMaybeResolveHomeDirectory()
      {
          assertThat(FileUtils.maybeResolveHomeDirectory(null)).isNull();
          assertThat(FileUtils.maybeResolveHomeDirectory("")).isEqualTo("");
          assertThat(FileUtils.maybeResolveHomeDirectory("~")).isEqualTo(System.getProperty("user.home"));
          assertThat(FileUtils.maybeResolveHomeDirectory("~/")).isEqualTo(System.getProperty("user.home") + "/");
          assertThat(FileUtils.maybeResolveHomeDirectory("~/.ccm")).isEqualTo(System.getProperty("user.home") + "/.ccm");
          assertThat(FileUtils.maybeResolveHomeDirectory("/dev/null")).isEqualTo("/dev/null");
      }
  
      @Test
      public void testStorageStringPatterns()
      {
          assertEquals(1, FileUtils.storageUnitToBytes("B"));
          assertEquals(1024, FileUtils.storageUnitToBytes("KiB"));
          assertEquals(1048576, FileUtils.storageUnitToBytes("MiB"));
          assertEquals(1073741824, FileUtils.storageUnitToBytes("GiB"));
  
          assertEquals(1048576L, FileUtils.mbStringToBytes("1"));
          assertEquals(524288000L, FileUtils.mbStringToBytes("500"));
  
          assertEquals(1L, Objects.requireNonNull(FileUtils.storageStringToBytes("1")).longValue());
          assertEquals(1L, Objects.requireNonNull(FileUtils.storageStringToBytes("1B")).longValue());
          assertEquals(500L, Objects.requireNonNull(FileUtils.storageStringToBytes("500B")).longValue());
          assertEquals(1024, Objects.requireNonNull(FileUtils.storageStringToBytes("1KiB")).longValue());
          assertEquals(1048576, Objects.requireNonNull(FileUtils.storageStringToBytes("1024KiB")).longValue());
          assertEquals(1048576, Objects.requireNonNull(FileUtils.storageStringToBytes("1MiB")).longValue());
          assertEquals(4294967296L, Objects.requireNonNull(FileUtils.storageStringToBytes("4096MiB")).longValue());
          assertEquals(536870912000L, Objects.requireNonNull(FileUtils.storageStringToBytes("500GiB")).longValue());
      }
  }
  