Add unit test for |MissingPDFException|

test/unit/api_spec.js

@@ -1,7 +1,7 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* globals PDFJS, expect, it, describe, Promise, combineUrl, waitsFor,
-           isArray */
+           isArray, MissingPDFException */
 
 'use strict';
 
@@ -79,6 +79,14 @@ describe('api', function() {
           expect(true).toEqual(true);
         });
       });
+      it('creates pdf doc from non-existent URL', function() {
+        var nonExistentUrl = combineUrl(window.location.href,
+                                        '../pdfs/non-existent.pdf');
+        var promise = PDFJS.getDocument(nonExistentUrl);
+        waitsForPromiseRejected(promise, function(error) {
+          expect(error instanceof MissingPDFException).toEqual(true);
+        });
+      });
     });
   });
   describe('PDFDocument', function() {