Create test FeatureEngagementTracker component

Provides a test FeatureEngagementTracker that makes all non-relevant conditions
true so you can test per-feature specific conditions/configurations.

Bug: 734132
Change-Id: I83e6f0be55870ae1eb812d0688d0cb416672ab3f
Reviewed-on: https://chromium-review.googlesource.com/570509
Commit-Queue: Catherine Chung <catherinechung@google.com>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487923}

components/feature_engagement_tracker/BUILD.gn

@@ -22,6 +22,9 @@ group("unit_tests") {
 
   deps = [
     "//components/feature_engagement_tracker/internal:unit_tests",
+
+    # TODO(crbug.com/744694 - following line will soon be removed)
+    "//components/feature_engagement_tracker/test:test_support",
   ]
 
   data_deps = [

components/feature_engagement_tracker/internal/BUILD.gn

@@ -11,6 +11,7 @@ static_library("internal") {
   visibility = [
     ":*",
     "//components/feature_engagement_tracker",
+    "//components/feature_engagement_tracker/test:test_support",
   ]
 
   sources = [

components/feature_engagement_tracker/test/BUILD.gn

+# 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.
+
+source_set("test_support") {
+  testonly = true
+
+  sources = [
+    "test_feature_engagement_tracker.cc",
+    "test_feature_engagement_tracker.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/feature_engagement_tracker/internal",
+    "//components/feature_engagement_tracker/public",
+  ]
+}

components/feature_engagement_tracker/test/test_feature_engagement_tracker.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 "components/feature_engagement_tracker/test/test_feature_engagement_tracker.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/threading/sequenced_task_runner_handle.h"
+#include "components/feature_engagement_tracker/internal/chrome_variations_configuration.h"
+#include "components/feature_engagement_tracker/internal/feature_config_condition_validator.h"
+#include "components/feature_engagement_tracker/internal/feature_config_storage_validator.h"
+#include "components/feature_engagement_tracker/internal/feature_engagement_tracker_impl.h"
+#include "components/feature_engagement_tracker/internal/in_memory_store.h"
+#include "components/feature_engagement_tracker/internal/init_aware_model.h"
+#include "components/feature_engagement_tracker/internal/model_impl.h"
+#include "components/feature_engagement_tracker/internal/never_availability_model.h"
+#include "components/feature_engagement_tracker/internal/system_time_provider.h"
+#include "components/feature_engagement_tracker/public/feature_engagement_tracker.h"
+#include "components/feature_engagement_tracker/public/feature_list.h"
+
+namespace feature_engagement_tracker {
+
+// static
+std::unique_ptr<FeatureEngagementTracker> CreateTestFeatureEngagementTracker() {
+  auto configuration = base::MakeUnique<ChromeVariationsConfiguration>();
+  configuration->ParseFeatureConfigs(GetAllFeatures());
+
+  auto storage_validator = base::MakeUnique<FeatureConfigStorageValidator>();
+  storage_validator->InitializeFeatures(GetAllFeatures(), *configuration);
+
+  auto raw_model = base::MakeUnique<ModelImpl>(
+      base::MakeUnique<InMemoryStore>(), std::move(storage_validator));
+
+  auto model = base::MakeUnique<InitAwareModel>(std::move(raw_model));
+
+  return base::MakeUnique<FeatureEngagementTrackerImpl>(
+      std::move(model), base::MakeUnique<NeverAvailabilityModel>(),
+      std::move(configuration),
+      base::MakeUnique<FeatureConfigConditionValidator>(),
+      base::MakeUnique<SystemTimeProvider>());
+}
+
+}  // namespace feature_engagement_tracker

components/feature_engagement_tracker/test/test_feature_engagement_tracker.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_FEATURE_ENGAGEMENT_TRACKER_TEST_TEST_FEATURE_ENGAGEMENT_TRACKER_H_
+#define COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_TEST_TEST_FEATURE_ENGAGEMENT_TRACKER_H_
+
+#include <memory>
+
+namespace feature_engagement_tracker {
+class FeatureEngagementTracker;
+
+// Provides a test FeatureEngagementTracker that makes all non-relevant
+// conditions true so you can test per-feature specific configurations.
+// Note: Your feature config params must have |"availability": "ANY"|
+// or the FeatureConfigConditionValidator will return false.
+std::unique_ptr<FeatureEngagementTracker> CreateTestFeatureEngagementTracker();
+
+}  // namespace feature_engagement_tracker
+
+#endif  // COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_TEST_TEST_FEATURE_ENGAGEMENT_TRACKER_H_