@Test
  public void should_be_able_to_write_and_read_string() {
    String key = "My String";
    Assert.assertEquals(null, preferenceService.getString(key, null));

    String textString = "iujqwkh786*%^9786y123";
    preferenceService.edit().putString(key, textString).commit();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(textString, preferenceService.getString(key, null));

    textString = "kvjubemuyek12-_-3294i0";
    preferenceService.edit().putString(key, textString).apply();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(textString, preferenceService.getString(key, null));

    preferenceService.edit().clear().commit();
    Assert.assertFalse(preferenceService.contains(key));
  }
  @Test
  public void should_be_able_to_write_and_read_boolean() {
    String key = "My Boolean";
    Assert.assertFalse(preferenceService.contains(key));

    Assert.assertEquals(true, preferenceService.getBoolean(key, true));

    preferenceService.edit().putBoolean(key, false).commit();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(false, preferenceService.getBoolean(key, true));

    preferenceService.edit().putBoolean(key, true).apply();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(true, preferenceService.getBoolean(key, false));

    preferenceService.edit().clear().commit();
    Assert.assertFalse(preferenceService.contains(key));
  }
  @Test
  public void should_be_able_to_write_and_read_long() {
    String key = "My Long";
    Assert.assertEquals(Long.MIN_VALUE, preferenceService.getLong(key, Long.MIN_VALUE));

    Random random = new Random();
    long num = random.nextLong();
    preferenceService.edit().putLong(key, num).commit();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(num, preferenceService.getLong(key, Long.MIN_VALUE));

    num = random.nextLong();
    preferenceService.edit().putLong(key, num).apply();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(num, preferenceService.getLong(key, Long.MIN_VALUE));

    preferenceService.edit().clear().commit();
    Assert.assertFalse(preferenceService.contains(key));
  }
  @Test
  public void should_be_able_to_write_and_read_int() {
    String key = "My Integer";
    Assert.assertEquals(Integer.MIN_VALUE, preferenceService.getInt(key, Integer.MIN_VALUE));

    Random random = new Random();
    int num = random.nextInt();
    preferenceService.edit().putInt(key, num).commit();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(num, preferenceService.getInt(key, Integer.MIN_VALUE));

    num = random.nextInt();
    preferenceService.edit().putInt(key, num).apply();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(num, preferenceService.getInt(key, Integer.MIN_VALUE));

    preferenceService.edit().clear().commit();
    Assert.assertFalse(preferenceService.contains(key));
  }
  @Test
  public void should_be_able_to_write_and_read_float() {
    String key = "My float";
    Assert.assertEquals(Float.MIN_VALUE, preferenceService.getFloat(key, Float.MIN_VALUE), 0.001f);

    Random random = new Random();
    float textFloat = random.nextFloat();
    preferenceService.edit().putFloat(key, textFloat).commit();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(textFloat, preferenceService.getFloat(key, Float.MIN_VALUE), 0.001f);

    textFloat = random.nextFloat();
    preferenceService.edit().putFloat(key, textFloat).apply();
    Assert.assertTrue(preferenceService.contains(key));
    Assert.assertEquals(textFloat, preferenceService.getFloat(key, Float.MIN_VALUE), 0.001f);

    preferenceService.edit().clear().commit();
    Assert.assertFalse(preferenceService.contains(key));
  }