Settings reset prompt: Add a test for the default settings fetcher.

chrome/browser/safe_browsing/settings_reset_prompt/default_settings_fetcher_browsertest.cc

+// 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.
+
+#include "chrome/browser/safe_browsing/settings_reset_prompt/default_settings_fetcher.h"
+
+#include <memory>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "chrome/browser/profile_resetter/brandcoded_default_settings.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace safe_browsing {
+namespace {
+
+class DefaultSettingsFetcherTest : public InProcessBrowserTest {
+ public:
+  void FetchedSettings(std::unique_ptr<BrandcodedDefaultSettings> settings) {
+    EXPECT_FALSE(settings_);
+    EXPECT_FALSE(fetched_settings_called);
+
+    fetched_settings_called = true;
+    settings_ = std::move(settings);
+  }
+
+ protected:
+  bool fetched_settings_called = false;
+  std::unique_ptr<BrandcodedDefaultSettings> settings_;
+};
+
+IN_PROC_BROWSER_TEST_F(DefaultSettingsFetcherTest, FetchingSettingsSucceeded) {
+  // The default settings that we will pretend were fetched. Keep the raw
+  // pointer here so that we can compare it to what was passed to the callback.
+  BrandcodedDefaultSettings* default_settings = new BrandcodedDefaultSettings();
+
+  DefaultSettingsFetcher::FetchDefaultSettingsForTesting(
+      base::Bind(&DefaultSettingsFetcherTest::FetchedSettings,
+                 base::Unretained(this)),
+      base::WrapUnique(default_settings));
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_TRUE(fetched_settings_called);
+  EXPECT_EQ(default_settings, settings_.get());
+}
+
+IN_PROC_BROWSER_TEST_F(DefaultSettingsFetcherTest, FetchingSettingsFailed) {
+  // Pretend that fetching default settings failed by passing in a nullptr to
+  // |FetchDefaultSettingsForTesting()|. The callback should still receive
+  // default-constructed default settings.
+  DefaultSettingsFetcher::FetchDefaultSettingsForTesting(
+      base::Bind(&DefaultSettingsFetcherTest::FetchedSettings,
+                 base::Unretained(this)),
+      nullptr);
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_TRUE(fetched_settings_called);
+  EXPECT_TRUE(settings_);
+}
+
+}  // namespace
+}  // namespace safe_browsing