Attributes a = new Attributes();
a.setBytes(Tag.AccessionNumber, VR.SH, WHITESPACES);
a.setBytes(Tag.StudyDescription, VR.LO, WHITESPACES);
a.setBytes(Tag.InstanceNumber, VR.IS, WHITESPACES);
a.setBytes(Tag.PixelSpacing, VR.DS, WHITESPACES);
assertFalse(a.containsValue(Tag.AccessionNumber));
assertNull(a.getString(Tag.StudyDescription));
assertEquals(-1, a.getInt(Tag.InstanceNumber, -1));
assertArrayEquals(ByteUtils.EMPTY_DOUBLES, a.getDoubles(Tag.PixelSpacing), 0);
assertArrayEquals(ByteUtils.EMPTY_FLOATS, a.getFloats(Tag.PixelSpacing), 0);
}