### Question:
CouchURIHelper { public URI revsDiffUri() { String uri = String.format( "%s/%s", this.rootUriString, "_revs_diff" ); return uriFor(uri); } CouchURIHelper(URI rootUri); URI getRootUri(); URI changesUri(Map<String, Object> query); URI bulkDocsUri(); URI revsDiffUri(); URI documentUri(String documentId); URI documentUri(String documentId, Map<String, Object> query); URI attachmentUri(String documentId, String attachmentId); URI attachmentUri(String documentId, Map<String, Object> query, String attachmentId);  }### Answer:
@Test public void revsDiffUri() throws Exception { URI expected = new URI(uriBase + "/test/_revs_diff"); URI actual = helper(path+"/test").revsDiffUri(); Assert.assertEquals(expected, actual); }