content/public/test/web_contents_tester.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_
   6 #define CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_
   7
   8 #include "content/public/common/page_transition_types.h"
   9
  10 class GURL;
  11 struct WebPreferences;
  12
  13 namespace content {
  14
  15 class BrowserContext;
  16 struct Referrer;
  17 class RenderViewHost;
  18 class SiteInstance;
  19 class WebContents;
  20
  21 // This interface allows embedders of content/ to write tests that depend on a
  22 // test version of WebContents.  This interface can be retrieved from any
  23 // WebContents that was retrieved via a call to
  24 // RenderViewHostTestHarness::GetWebContents() (directly or indirectly) or
  25 // constructed explicitly via CreateTestWebContents.
  26 //
  27 // Tests within content/ can directly static_cast WebContents objects retrieved
  28 // or created as described above to TestWebContents.
  29 //
  30 // Design note: We considered two alternatives to this separate test interface
  31 // approach:
  32 //
  33 // a) Define a TestWebContents interface that inherits from WebContents, and
  34 // have the concrete TestWebContents inherit from it as well as from
  35 // WebContentsImpl.  This approach was discarded as it introduces a diamond
  36 // inheritance pattern, which means we wouldn't be e.g. able to downcast from
  37 // WebContents to WebContentsImpl using static_cast.
  38 //
  39 // b) Define a TestWebContents interface that inherits from WebContents, and
  40 // have the concrete TestWebContents implement it, using composition of a
  41 // WebContentsImpl to implement most methods.  This approach was discarded as
  42 // there is a fundamental assumption in content/ that a WebContents* can be
  43 // downcast to a WebContentsImpl*, and this wouldn't be true for TestWebContents
  44 // objects.
  45 class WebContentsTester {
  46  public:
  47   // Retrieves a WebContentsTester to drive tests of the specified WebContents.
  48   // As noted above you need to be sure the 'contents' object supports testing,
  49   // i.e. is either created using one of the Create... functions below, or is
  50   // retrieved via RenderViewHostTestHarness::GetWebContents().
  51   static WebContentsTester* For(WebContents* contents);
  52
  53   // Creates a WebContents enabled for testing.
  54   static WebContents* CreateTestWebContents(
  55       BrowserContext* browser_context,
  56       SiteInstance* instance);
  57
  58   // Simulates the appropriate RenderView (pending if any, current otherwise)
  59   // sending a navigate notification for the NavigationController pending entry.
  60   virtual void CommitPendingNavigation() = 0;
  61
  62   virtual RenderViewHost* GetPendingRenderViewHost() const = 0;
  63
  64   // Creates a pending navigation to the given URL with the default parameters
  65   // and then commits the load with a page ID one larger than any seen. This
  66   // emulates what happens on a new navigation.
  67   virtual void NavigateAndCommit(const GURL& url) = 0;
  68
  69   // Sets the loading state to the given value.
  70   virtual void TestSetIsLoading(bool value) = 0;
  71
  72   // Simulates the current RVH notifying that it has unloaded so that the
  73   // pending RVH navigation can proceed.
  74   // Does nothing if no cross-navigation is pending.
  75   virtual void ProceedWithCrossSiteNavigation() = 0;
  76
  77   virtual void TestDidNavigate(RenderViewHost* render_view_host,
  78                                int page_id,
  79                                const GURL& url,
  80                                PageTransition transition) = 0;
  81
  82   virtual void TestDidNavigateWithReferrer(
  83       RenderViewHost* render_view_host,
  84       int page_id,
  85       const GURL& url,
  86       const Referrer& referrer,
  87       PageTransition transition) = 0;
  88
  89   // Promote GetWebkitPrefs to public.
  90   virtual WebPreferences TestGetWebkitPrefs() = 0;
  91 };
  92
  93 }  // namespace content
  94
  95 #endif  // CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_