@Test
public void shouldReturnNullFromParseCommentTestIfNotFollowedByOpenAndCloseParenthesis() {

    assertThat(parser.parseCommentTest(tokenize("comment x )")), is(nullValue()));
    assertThat(parser.parseCommentTest(tokenize("comment(x )")), is(nullValue()));
    assertThat(parser.parseCommentTest(tokenize("comment(x")), is(nullValue()));
}