@Test
public void testGetExpression() throws Exception {

	String expressionString = "expression";
	Tag tag = new Tag();
	tag.setVal(expressionString);
	SdtElement element = createPlainTextContentControl(SdtBlock.class);
	element.getSdtPr().setTag(tag);
	PlainTextContent plainTextContent = new PlainTextContent(element);
	assertEquals(expressionString, plainTextContent.getExpression());
}