Fixed reference to "items" property in JSON

src/Catalog/Collecting/BatchCollector.cs

@@ -36,7 +36,7 @@ protected override async Task<CollectorCursor> Fetch(CollectorHttpClient client,
             JToken context = null;
             root.TryGetValue("@context", out context);
 
-            IEnumerable<JToken> rootItems = root["item"].OrderBy(item => item["commitTimestamp"].ToObject<DateTime>());
+            IEnumerable<JToken> rootItems = root["items"].OrderBy(item => item["commitTimestamp"].ToObject<DateTime>());
 
             foreach (JObject rootItem in rootItems)
             {
@@ -47,7 +47,7 @@ protected override async Task<CollectorCursor> Fetch(CollectorHttpClient client,
                     Uri pageUri = rootItem["url"].ToObject<Uri>();
                     JObject page = await client.GetJObjectAsync(pageUri);
 
-                    IEnumerable<JToken> pageItems = page["item"].OrderBy(item => item["commitTimestamp"].ToObject<DateTime>());
+                    IEnumerable<JToken> pageItems = page["items"].OrderBy(item => item["commitTimestamp"].ToObject<DateTime>());
 
                     foreach (JObject pageItem in pageItems)
                     {

src/Catalog/Collecting/Test/CountCollector.cs

@@ -28,7 +28,7 @@ protected override async Task<CollectorCursor> Fetch(CollectorHttpClient client,
 
             List<Task<JObject>> tasks = new List<Task<JObject>>();
 
-            foreach (JObject rootItem in root["item"])
+            foreach (JObject rootItem in root["items"])
             {
                 DateTime pageTimeStamp = rootItem["commitTimestamp"].ToObject<DateTime>();
 

tests/CatalogTests/CatalogTests.cs

@@ -24,7 +24,7 @@ public async Task Test0Async()
             string indexJson = await client.GetStringAsync(address);
             JObject indexObj = JObject.Parse(indexJson);
 
-            foreach (JToken indexItem in indexObj["item"])
+            foreach (JToken indexItem in indexObj["items"])
             {
                 DateTime indexItemTimeStamp = indexItem["commitTimestamp"].ToObject<DateTime>();
 
@@ -33,7 +33,7 @@ public async Task Test0Async()
                     string pageJson = await client.GetStringAsync(indexItem["url"].ToObject<Uri>());
                     JObject pageObj = JObject.Parse(pageJson);
 
-                    foreach (JToken pageItem in pageObj["item"])
+                    foreach (JToken pageItem in pageObj["items"])
                     {
                         DateTime pageItemTimeStamp = pageItem["commitTimestamp"].ToObject<DateTime>();