add basic spec

atom/browser/atom_resource_dispatcher_host_delegate.cc

@@ -65,7 +65,6 @@ void HandleExternalProtocolInUI(
 
 void OnPdfStreamCreated(
     std::unique_ptr<content::StreamInfo> stream,
-    int64_t expected_content_size,
     const content::ResourceRequestInfo::WebContentsGetter& web_contents_getter,
     int render_process_id,
     int render_frame_id) {
@@ -150,7 +149,6 @@ void AtomResourceDispatcherHostDelegate::OnStreamCreated(
   content::BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&OnPdfStreamCreated, base::Passed(&stream),
-                 request->GetExpectedContentSize(),
                  info->GetWebContentsGetterForRequest(), info->GetChildID(),
                  info->GetRenderFrameID()));
 }

atom/renderer/atom_renderer_client.cc

@@ -276,8 +276,8 @@ void AtomRendererClient::RenderFrameCreated(
   blink::resetPluginCache();
 
   // Allow access to file scheme from pdf viewer.
-  blink::WebSecurityPolicy::addOriginAccessWhitelistEntry(GURL(kPdfPluginPath),
+  blink::WebSecurityPolicy::addOriginAccessWhitelistEntry(
-                                                          "file", "", true);
+      GURL(kPdfViewerUIOrigin), "file", "", true);
 
   // Parse --secure-schemes=scheme1,scheme2
   std::vector<std::string> secure_schemes_list =

spec/chromium-spec.js

@@ -3,7 +3,7 @@ const http = require('http')
 const path = require('path')
 const ws = require('ws')
 const url = require('url')
-const {ipcRenderer, remote} = require('electron')
+const {ipcRenderer, remote, webFrame} = require('electron')
 const {closeWindow} = require('./window-helpers')
 
 const {app, BrowserWindow, ipcMain, protocol, session, webContents} = remote
@@ -802,4 +802,50 @@ describe('chromium feature', function () {
       })
     })
   })
+
+  describe('PDF Viewer', function () {
+    let w = null
+    const pdfSource = `file://${fixtures}/assets/pdf.pdf`
+
+    beforeEach(function () {
+      w = new BrowserWindow({
+        show: false
+      })
+    })
+
+    afterEach(function () {
+      return closeWindow(w).then(function () { w = null })
+    })
+
+    it('opens when loading a pdf resource as top level navigation', function (done) {
+      w.webContents.on('did-finish-load', function () {
+        const parsedURL = url.parse(w.webContents.getURL(), true)
+        assert.equal(parsedURL.protocol, 'chrome:')
+        assert.equal(parsedURL.hostname, 'pdf-viewer')
+        assert.equal(parsedURL.query.src, pdfSource)
+        assert(!!parsedURL.query.streamId.length)
+      })
+      w.webContents.on('page-title-updated', function () {
+        assert.equal(w.webContents.getTitle(), 'PDF')
+        done()
+      })
+      w.webContents.loadURL(pdfSource)
+    })
+
+    it('should not open when pdf is requested as sub resource', function (done) {
+      webFrame.registerURLSchemeAsPrivileged('file', {
+        secure: false,
+        bypassCSP: false,
+        allowServiceWorkers: false,
+        corsEnabled: false
+      })
+      fetch(pdfSource).then(function (res) {
+        assert.equal(res.status, 200)
+        assert.notEqual(document.title, 'PDF')
+        done()
+      }).catch(function (e) {
+        done(e)
+      })
+    })
+  })
 })