ActivationStateComputingThrottle unit tests

components/subresource_filter/content/browser/async_document_subresource_filter_test_utils.h

+// Copyright 2017 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.
+
+#ifndef COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_ASYNC_DOCUMENT_SUBRESOURCE_FILTER_TEST_UTILS_H_
+#define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_ASYNC_DOCUMENT_SUBRESOURCE_FILTER_TEST_UTILS_H_
+
+#include "components/subresource_filter/content/browser/async_document_subresource_filter.h"

[engedy, 2017/03/10 10:56:57]

nit: Include activation_state.h instead and get rid of this?

[Charlie Harrison, 2017/03/10 17:12:47]

Done.

+
+#include "base/bind.h"

[engedy, 2017/03/10 10:56:58]

nit: callback_forward.h

[Charlie Harrison, 2017/03/10 17:12:47]

Done.

+#include "base/macros.h"
+
+namespace subresource_filter {
+namespace testing {
+
+// This test class is intended to be used in conjunction with an
+// AsyncDocumentSubresourceFilter, and can be used to expect a certain
+// activation result occured.
+class TestActivationStateCallbackReceiver {
+ public:
+  TestActivationStateCallbackReceiver() = default;
+
+  base::Callback<void(ActivationState)> GetCallback();
+  void ExpectReceivedOnce(const ActivationState& expected_state) const;
+
+ private:
+  void Callback(ActivationState activation_state);
+
+  ActivationState last_activation_state_;
+  int callback_count_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(TestActivationStateCallbackReceiver);
+};
+
+}  // namespace testing
+}  // namespace subresource_filter
+
+#endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_ASYNC_DOCUMENT_SUBRESOURCE_FILTER_TEST_UTILS_H_