private Comment testAddCommentToIssueImpl(final String issueKey, final Comment comment) {
final IssueRestClient issueClient = client.getIssueClient();
final Issue issue = issueClient.getIssue(issueKey).claim();
final List<Comment> initialComments = Lists.newArrayList(issue.getComments());
issueClient.addComment(issue.getCommentsUri(), comment).claim();
final Issue issueWithComments = issueClient.getIssue(issueKey).claim();
final List<Comment> newComments = Lists.newArrayList(issueWithComments.getComments());
newComments.removeAll(initialComments);
assertEquals(1, Iterables.size(newComments));