Implement a ResourceThrottle for URL overriding in Chrome on Android.

chrome/browser/renderer_host/intercept_navigation_resource_throttle_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "chrome/browser/renderer_host/intercept_navigation_resource_throttle.h"
+#include "chrome/test/base/chrome_render_view_host_test_harness.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/resource_context.h"
+#include "content/public/browser/resource_dispatcher_host.h"
+#include "content/public/browser/resource_dispatcher_host_delegate.h"
+#include "content/public/browser/resource_request_info.h"
+#include "content/public/browser/resource_throttle.h"
+#include "content/public/browser/resource_throttle_controller.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_delegate.h"
+#include "content/test/mock_resource_context.h"
+#include "content/test/test_browser_thread.h"
+#include "net/url_request/url_request.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using namespace content;
+using namespace ::testing;
+
+namespace {
+
+const char* kTestUrl = "http://www.test.com/";
+
+void ContinueTestCase() {
+  BrowserThread::PostTask(
+      BrowserThread::UI,
+      FROM_HERE,
+      MessageLoop::QuitClosure());
+}
+
+} // namespace
+
+// MockWebContentsDelegate ----------------------------------------------------
+
+class MockWebContentsDelegate : public content::WebContentsDelegate {
+ public:
+  MOCK_METHOD4(ShouldIgnoreNavigation, bool(WebContents* source,
+                                            const GURL& url,
+                                            const content::Referrer& referrer,
+                                            bool is_content_initiated));
+};
+
+// MockResourceThrottleController
+class MockResourceThrottleController
+    : public content::ResourceThrottleController {
+ public:
+  enum Status {
+    UNKNOWN,
+    RESUMED,
+    CANCELLED
+  };
+
+  MockResourceThrottleController()
+      : status_(UNKNOWN) {
+  }
+
+  Status status() const { return status_; }
+
+  // content::ResourceThrottleController
+  virtual void Cancel() {
+    DCHECK(status_ == UNKNOWN);
+    status_ = CANCELLED;
+    ContinueTestCase();
+  }
+  virtual void Resume() {
+    DCHECK(status_ == UNKNOWN);
+    status_ = RESUMED;
+    ContinueTestCase();
+  }
+
+ private:
+  Status status_;
+};
+
+// TestIOThreadState ----------------------------------------------------------
+
+class TestIOThreadState {
+ public:
+  TestIOThreadState(int render_process_id, int render_view_id)
+      : request_(GURL(kTestUrl), NULL),
+        throttle_(&request_) {
+      DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+      if (render_process_id != MSG_ROUTING_NONE &&
+          render_view_id != MSG_ROUTING_NONE) {
+        ResourceRequestInfo::AllocateForTesting(&request_,
+                                                ResourceType::MAIN_FRAME,
+                                                &resource_context_,
+                                                render_process_id,
+                                                render_view_id);
+      }
+      throttle_.set_controller_for_testing(&throttle_controller_);
+  }
+
+  void ThrottleWillStartRequest(bool* defer) {
+    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+    throttle_.WillStartRequest(defer);
+  }
+
+  bool request_resumed() const {
+    return throttle_controller_.status() ==
+        MockResourceThrottleController::RESUMED;
+  }
+
+  bool request_cancelled() const {
+    return throttle_controller_.status() ==
+        MockResourceThrottleController::CANCELLED;
+  }
+
+ private:
+  content::MockResourceContext resource_context_;
+  net::URLRequest request_;
+  InterceptNavigationResourceThrottle throttle_;
+  MockResourceThrottleController throttle_controller_;
+};
+
+// InterceptNavigationResourceThrottleTest ------------------------------------
+
+class InterceptNavigationResourceThrottleTest
+  : public ChromeRenderViewHostTestHarness {
+ public:
+  InterceptNavigationResourceThrottleTest()
+      : ui_thread_(BrowserThread::UI, &message_loop_),
+        io_thread_(BrowserThread::IO),
+        io_thread_state_(NULL) {
+  }
+
+  virtual void SetUp() OVERRIDE {
+    ChromeRenderViewHostTestHarness::SetUp();
+
+    io_thread_.StartIOThread();
+  }
+
+  virtual void TearDown() OVERRIDE {
+    web_contents()->SetDelegate(NULL);
+    BrowserThread::PostTask(
+        BrowserThread::IO,
+        FROM_HERE,
+        base::Bind(&base::DeletePointer<TestIOThreadState>, io_thread_state_));
+
+    ChromeRenderViewHostTestHarness::TearDown();
+  }
+
+  void SetIOThreadState(TestIOThreadState* io_thread_state) {
+    io_thread_state_ = io_thread_state;
+  }
+
+  void RunThrottleWillStartRequestOnIOThread(
+      int render_process_id,
+      int render_view_id,
+      bool* defer) {
+    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+    TestIOThreadState* io_thread_state =
+        new TestIOThreadState(render_process_id, render_view_id);
+
+    SetIOThreadState(io_thread_state);
+    io_thread_state->ThrottleWillStartRequest(defer);
+
+    if (!*defer) {
+      ContinueTestCase();
+    }
+  }
+
+ protected:
+  enum ShouldIgnoreNavigationCallbackAction {
+    IgnoreNavigation,
+    DontIgnoreNavigation
+  };
+
+  void SetUpWebContentsDelegateAndRunMessageLoop(
+      ShouldIgnoreNavigationCallbackAction callback_action,
+      bool* defer) {
+    scoped_ptr<MockWebContentsDelegate> web_contents_delegate(
+        new MockWebContentsDelegate());
+    EXPECT_FALSE(web_contents()->GetDelegate());
+    web_contents()->SetDelegate(web_contents_delegate.get());
+
+    ON_CALL(*web_contents_delegate,
+            ShouldIgnoreNavigation(_, Eq(GURL(kTestUrl)), _, _))
+      .WillByDefault(Return(callback_action == IgnoreNavigation));
+    EXPECT_CALL(*web_contents_delegate,
+                ShouldIgnoreNavigation(_, Eq(GURL(kTestUrl)), _, _))
+      .Times(1);
+
+    BrowserThread::PostTask(
+        BrowserThread::IO,
+        FROM_HERE,
+        base::Bind(
+            &InterceptNavigationResourceThrottleTest::
+                RunThrottleWillStartRequestOnIOThread,
+            base::Unretained(this),
+            contents()->GetRenderViewHost()->GetProcess()->GetID(),
+            contents()->GetRenderViewHost()->GetRoutingID(),
+            base::Unretained(defer)));
+
+    // Wait for the request to finish processing.
+    message_loop_.Run();
+  }
+
+  content::TestBrowserThread ui_thread_;
+  content::TestBrowserThread io_thread_;
+  TestIOThreadState* io_thread_state_;
+};
+
+TEST_F(InterceptNavigationResourceThrottleTest,
+       RequestDeferredAndResumedIfNavigationNotIgnored) {
+  bool defer = false;
+  SetUpWebContentsDelegateAndRunMessageLoop(DontIgnoreNavigation, &defer);
+
+  EXPECT_TRUE(defer);
+  EXPECT_TRUE(io_thread_state_);
+  EXPECT_TRUE(io_thread_state_->request_resumed());
+}
+
+TEST_F(InterceptNavigationResourceThrottleTest,
+       RequestDeferredAndCancelledIfNavigationIgnored) {
+  bool defer = false;
+  SetUpWebContentsDelegateAndRunMessageLoop(IgnoreNavigation, &defer);
+
+  EXPECT_TRUE(defer);
+  EXPECT_TRUE(io_thread_state_);
+  EXPECT_TRUE(io_thread_state_->request_cancelled());
+}
+
+TEST_F(InterceptNavigationResourceThrottleTest,
+       RequestNotDeferredForRequestNotAssociatedWithARenderView) {
+  bool defer = false;
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(
+          &InterceptNavigationResourceThrottleTest::
+              RunThrottleWillStartRequestOnIOThread,
+          base::Unretained(this),
+          MSG_ROUTING_NONE,
+          MSG_ROUTING_NONE,
+          base::Unretained(&defer)));
+
+  // Wait for the request to finish processing.
+  message_loop_.Run();
+
+  EXPECT_FALSE(defer);
+}