implement #138 since option for collection.getTotalRecords

src/collection.js

@@ -1,6 +1,6 @@
 import { v4 as uuid } from "uuid";
 
-import { capable, toDataBody, isObject } from "./utils";
+import { capable, toDataBody, isObject, qsify } from "./utils";
 import * as requests from "./requests";
 import endpoint from "./endpoint";
 
@@ -79,13 +79,19 @@ export default class Collection {
    *
    * @param  {Object} [options={}]      The options object.
    * @param  {Object} [options.headers] The headers object option.
+   * @param  {String} [options.since]   The since ETag option.
    * @return {Promise<Number, Error>}
    */
   getTotalRecords(options={}) {
-    const { headers } = this._collOptions(options);
+    const { since, ...otherOptions } = options;
+    const { headers } = this._collOptions(otherOptions);
+    let path = endpoint("record", this.bucket.name, this.name);
+    if (since) {
+      path += "?" + qsify({since});
+    }
     return this.client.execute({
       method: "HEAD",
-      path: endpoint("record", this.bucket.name, this.name),
+      path,
       headers
     }, {raw: true})
       .then(({headers}) => parseInt(headers.get("Total-Records"), 10));

test/collection_test.js

@@ -54,6 +54,18 @@ describe("Collection", () => {
       return getBlogPostsCollection().getTotalRecords()
         .should.become(42);
     });
+
+    it("should pass the since parameter", () => {
+      sandbox.stub(client, "execute").returns(Promise.resolve());
+
+      getBlogPostsCollection().getTotalRecords({since: "ETAG"});
+
+      sinon.assert.calledWithMatch(client.execute, {
+        method: "HEAD",
+        path: "/buckets/blog/collections/posts/records?since=ETAG",
+      }, {raw: true});
+    });
+
   });
 
   /** @test {Collection#getData} */