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Expected differences help with focussing on the unexpected differences.

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 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2019 wcm.io
 * %%
 * Licensed 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
 *
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 * distributed under the License is distributed on an "AS IS" BASIS,
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package io.wcm.qa.glnm.differences.difference.driver;

import org.apache.commons.lang3.SystemUtils;

import io.wcm.qa.glnm.differences.base.DifferenceBase;

/**
 * Uses {@link SystemUtils} to tell apart the big three OSes:
 * 
 * LINUX
 * OSX
 * WINDOWS
 * 
 */
public class OsFamilyDifference extends DifferenceBase {

  private enum OsFamily {
    LINUX, OSX, WINDOWS, UNKNOWN
  }

  @Override
  protected String getRawTag() {
    return getOsFamily().name();
  }

  private OsFamily getOsFamily() {
    if (SystemUtils.IS_OS_LINUX) {
      return OsFamily.LINUX;
    }
    if (SystemUtils.IS_OS_MAC_OSX) {
      return OsFamily.OSX;
    }
    if (SystemUtils.IS_OS_WINDOWS) {
      return OsFamily.WINDOWS;
    }
    return OsFamily.UNKNOWN;
  }

}