Adds tests for node_stream

src/display/network.js

@@ -351,18 +351,16 @@ function PDFNetworkStreamFullRequestReader(manager, options) {
 }
 
 PDFNetworkStreamFullRequestReader.prototype = {
-  getResponseHeader(name) {
-    let fullRequestXhrId = this._fullRequestId;
-    let fullRequestXhr = this._manager.getRequestXhr(fullRequestXhrId);
-
-    return fullRequestXhr.getResponseHeader(name);
-  },
-
   _onHeadersReceived:
       function PDFNetworkStreamFullRequestReader_onHeadersReceived() {
+    var fullRequestXhrId = this._fullRequestId;
+    var fullRequestXhr = this._manager.getRequestXhr(fullRequestXhrId);
+
     let { allowRangeRequests, suggestedLength, } =
       validateRangeRequestCapabilities({
-        getResponseHeader: this.getResponseHeader.bind(this),
+        getResponseHeader: (name) => {
+          return fullRequestXhr.getResponseHeader(name);
+        },
         isHttp: this._manager.isHttp,
         rangeChunkSize: this._rangeChunkSize,
         disableRange: this._disableRange,
@@ -376,7 +374,6 @@ PDFNetworkStreamFullRequestReader.prototype = {
     }
 
     var networkManager = this._manager;
-    var fullRequestXhrId = this._fullRequestId;
     if (networkManager.isStreamingRequest(fullRequestXhrId)) {
       // We can continue fetching when progressive loading is enabled,
       // and we don't need the autoFetch feature.

src/display/network_utils.js

@@ -13,10 +13,11 @@
  * limitations under the License.
  */
 
-import { isInt } from '../shared/util';
+import { assert, isInt } from '../shared/util';
 
 function validateRangeRequestCapabilities({ getResponseHeader, isHttp,
                                             rangeChunkSize, disableRange, }) {
+  assert(rangeChunkSize > 0);
   let returnValues = {
     allowRangeRequests: false,
     suggestedLength: undefined,