Add a unit-test for bug 1020226

For reference, see PR 4902 and https://bugzilla.mozilla.org/show_bug.cgi?id=1020226.

test/pdfs/.gitignore

@@ -114,6 +114,7 @@
 !bug1065245.pdf
 !bug1151216.pdf
 !bug1175962.pdf
+!bug1020226.pdf
 !basicapi.pdf
 !mixedfonts.pdf
 !shading_extend.pdf

test/pdfs/bug1020226.pdf

@@ -0,0 +1,24 @@
+%PDF-1.4
+1 0 obj 
+<<
+/Pages 2 0 R
+2 0 obj 
+<<
+/Resources 
+>>
+/Contents 811 0 R
+811 0 obj 
+<<
+/Length 17863
+>>
+stream
+BI
+/W 62
+/H 62
+/D[1
+0]
+/F/CCFŠ/DP<</K -1
+trailer
+<<
+/Root 1 0 R
+>>

test/unit/api_spec.js

@@ -1,7 +1,8 @@
 /* -*- 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,
-           MissingPDFException, StreamType, FontType, PDFPageProxy */
+           InvalidPDFException, MissingPDFException, StreamType, FontType,
+           PDFPageProxy */
 
 'use strict';
 
@@ -79,6 +80,15 @@ describe('api', function() {
           expect(true).toEqual(true);
         });
       });
+      it('creates pdf doc from invalid PDF file', function() {
+        // A severely corrupt PDF file (even Adobe Reader fails to open it).
+        var url = combineUrl(window.location.href, '../pdfs/bug1020226.pdf');
+
+        var promise = PDFJS.getDocument(url);
+        waitsForPromiseRejected(promise, function (error) {
+          expect(error instanceof InvalidPDFException).toEqual(true);
+        });
+      });
       it('creates pdf doc from non-existent URL', function() {
         var nonExistentUrl = combineUrl(window.location.href,
                                         '../pdfs/non-existent.pdf');