private WeatherBuoyPreferences makeMetricPreferences() {
   WeatherBuoyPreferences mockPreferences = mock(WeatherBuoyPreferences.class);
   when(mockPreferences.getUserUnitSystem()).thenReturn(UnitSystem.METRIC);
   return mockPreferences;
 }
 private WeatherBuoyPreferences makeNauticalPreferences() {
   WeatherBuoyPreferences mockPreferences = mock(WeatherBuoyPreferences.class);
   when(mockPreferences.getUserUnitSystem()).thenReturn(UnitSystem.NAUTICAL);
   return mockPreferences;
 }
 private WeatherBuoyPreferences makeImperialPreferences() {
   WeatherBuoyPreferences mockPreferences = mock(WeatherBuoyPreferences.class);
   when(mockPreferences.getUserUnitSystem()).thenReturn(UnitSystem.IMPERIAL);
   return mockPreferences;
 }