Support IPH NotifyEvent calls before Initialize

components/feature_engagement_tracker/internal/init_aware_model_unittest.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/internal/init_aware_model.h"
+
+#include <memory>
+
+#include "base/bind.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/optional.h"
+#include "components/feature_engagement_tracker/internal/proto/event.pb.h"
+#include "components/feature_engagement_tracker/internal/test/event_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::Return;
+using testing::SaveArg;
+using testing::Sequence;
+
+namespace feature_engagement_tracker {
+
+namespace {
+
+class MockModel : public Model {
+ public:
+  MockModel() = default;
+  ~MockModel() override = default;
+
+  // Model implementation.
+  MOCK_METHOD2(Initialize,
+               void(const OnModelInitializationFinished&, uint32_t));
+  MOCK_CONST_METHOD0(IsReady, bool());
+  MOCK_CONST_METHOD1(GetEvent, Event*(const std::string&));
+  MOCK_METHOD2(IncrementEvent, void(const std::string&, uint32_t));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockModel);
+};
+
+class InitAwareModelTest : public testing::Test {
+ public:
+  InitAwareModelTest() : mocked_model_(nullptr) {
+    load_callback_ = base::Bind(&InitAwareModelTest::OnModelInitialized,
+                                base::Unretained(this));
+  }
+
+  ~InitAwareModelTest() override = default;
+
+  void SetUp() override {
+    auto mocked_model = base::MakeUnique<MockModel>();
+    mocked_model_ = mocked_model.get();
+    model_ = base::MakeUnique<InitAwareModel>(std::move(mocked_model));
+  }
+
+ protected:
+  void OnModelInitialized(bool success) { load_success_ = success; }
+
+  std::unique_ptr<InitAwareModel> model_;
+  MockModel* mocked_model_;
+
+  // Load callback tracking.
+  base::Optional<bool> load_success_;
+  Model::OnModelInitializationFinished load_callback_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InitAwareModelTest);
+};
+
+}  // namespace
+
+TEST_F(InitAwareModelTest, PassThroughIsReady) {
+  EXPECT_CALL(*mocked_model_, IsReady()).Times(1);
+  model_->IsReady();
+}
+
+TEST_F(InitAwareModelTest, PassThroughGetEvent) {
+  Event foo;
+  foo.set_name("foo");
+  test::SetEventCountForDay(&foo, 1, 1);
+
+  EXPECT_CALL(*mocked_model_, GetEvent(foo.name()))
+      .WillRepeatedly(Return(&foo));
+  EXPECT_CALL(*mocked_model_, GetEvent("bar")).WillRepeatedly(Return(nullptr));
+
+  test::VerifyEventsEqual(&foo, model_->GetEvent(foo.name()));
+  EXPECT_EQ(nullptr, model_->GetEvent("bar"));
+}
+
+TEST_F(InitAwareModelTest, PassThroughIncrementEvent) {
+  EXPECT_CALL(*mocked_model_, IsReady()).WillRepeatedly(Return(true));
+
+  Sequence sequence;
+  EXPECT_CALL(*mocked_model_, IncrementEvent("foo", 0U)).InSequence(sequence);
+  EXPECT_CALL(*mocked_model_, IncrementEvent("bar", 1U)).InSequence(sequence);
+
+  model_->IncrementEvent("foo", 0U);
+  model_->IncrementEvent("bar", 1U);
+}
+
+TEST_F(InitAwareModelTest, QueuedIncrementEvent) {
+  {
+    EXPECT_CALL(*mocked_model_, IsReady()).WillRepeatedly(Return(false));
+    EXPECT_CALL(*mocked_model_, IncrementEvent(_, _)).Times(0);
+
+    model_->IncrementEvent("foo", 0U);
+    model_->IncrementEvent("bar", 1U);
+  }
+
+  Model::OnModelInitializationFinished callback;
+  EXPECT_CALL(*mocked_model_, Initialize(_, 2U))
+      .WillOnce(SaveArg<0>(&callback));
+  model_->Initialize(load_callback_, 2U);
+
+  {
+    Sequence sequence;
+    EXPECT_CALL(*mocked_model_, IncrementEvent("foo", 0U))
+        .Times(1)
+        .InSequence(sequence);
+    EXPECT_CALL(*mocked_model_, IncrementEvent("bar", 1U))
+        .Times(1)
+        .InSequence(sequence);
+
+    callback.Run(true);
+    EXPECT_TRUE(load_success_.value());
+  }
+
+  EXPECT_CALL(*mocked_model_, IsReady()).WillRepeatedly(Return(true));
+  EXPECT_CALL(*mocked_model_, IncrementEvent("qux", 3U)).Times(1);
+  model_->IncrementEvent("qux", 3U);
+}
+
+}  // namespace feature_engagement_tracker