@Test
public void createKeywordShouldWorkCorrectlyWhenKeywordExists() {
String value = "something";
Keyword keyword = new Keyword(value);
service.createKeyword(value);
service.createKeyword(value);
service.createKeyword(value);
assertNotNull(keywordDao.getByValue(keyword));
}
@Test(expected = IllegalArgumentException.class)
public void createKeywordShouldThrowOnNullKeyword() {
service.createKeyword(null);
}