storage-units/src/test/java/de/xn__ho_hia/storage_unit/StorageUnitsTest.java

   1 /*
   2  * This file is part of storage-units. It is subject to the license terms in the LICENSE file found in the top-level
   3  * directory of this distribution and at http://creativecommons.org/publicdomain/zero/1.0/. No part of storage-units,
   4  * including this file, may be copied, modified, propagated, or distributed except according to the terms contained
   5  * in the LICENSE file.
   6  */
   7 package de.xn__ho_hia.storage_unit;
   8
   9 import java.lang.reflect.Constructor;
  10 import java.lang.reflect.InvocationTargetException;
  11 import java.lang.reflect.Modifier;
  12
  13 import org.junit.Assert;
  14 import org.junit.Test;
  15
  16 import de.xn__ho_hia.quality.suppression.CompilerWarnings;
  17 import de.xn__ho_hia.storage_unit.StorageUnits;
  18
  19 /**
  20  * General test cases for the {@link StorageUnits} class.
  21  */
  22 public class StorageUnitsTest {
  23
  24     /**
  25      * Ensures that the constructor of the {@link StorageUnits} class is private.
  26      * <p>
  27      * The class should never be instantiated. Instead use the static factory methods to construct storage units.
  28      *
  29      * @throws NoSuchMethodException
  30      *             Should not fail in case the StorageUnits class has a constructor..
  31      * @throws IllegalAccessException
  32      *             Should not fail in case the StorageUnits class has a constructor..
  33      * @throws InvocationTargetException
  34      *             Should not fail in case the StorageUnits class has a constructor..
  35      * @throws InstantiationException
  36      *             Should not fail in case the StorageUnits class has a constructor..
  37      */
  38     @Test
  39     @SuppressWarnings({ CompilerWarnings.NLS, CompilerWarnings.STATIC_METHOD })
  40     public void shouldDeclarePrivateConstructor()
  41             throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
  42         // Given
  43         final Constructor<StorageUnits> constructor = StorageUnits.class.getDeclaredConstructor();
  44
  45         // When
  46         final boolean isPrivate = Modifier.isPrivate(constructor.getModifiers());
  47
  48         // Then
  49         Assert.assertTrue("Constructor is not private", isPrivate);
  50         constructor.setAccessible(true);
  51         constructor.newInstance();
  52     }
  53
  54 }