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