[Sync] Move some code into new class JsMutationEventObserver

chrome/browser/sync/js/js_mutation_event_observer_unittest.cc

+// Copyright (c) 2011 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/sync/js/js_mutation_event_observer.h"
+
+#include "base/basictypes.h"
+#include "base/message_loop.h"
+#include "base/values.h"
+#include "chrome/browser/sync/js/js_event_details.h"
+#include "chrome/browser/sync/js/js_test_util.h"
+#include "chrome/browser/sync/syncable/model_type.h"
+#include "chrome/browser/sync/util/weak_handle.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace browser_sync {
+namespace {
+
+using ::testing::InSequence;
+using ::testing::StrictMock;
+
+class JsMutationEventObserverTest : public testing::Test {
+ protected:
+  JsMutationEventObserverTest() {
+    js_mutation_event_observer_.SetJsEventHandler(
+        mock_js_event_handler_.AsWeakHandle());
+  }
+
+ private:
+  // This must be destroyed after the member variables below in order
+  // for WeakHandles to be destroyed properly.
+  MessageLoop message_loop_;
+
+ protected:
+  StrictMock<MockJsEventHandler> mock_js_event_handler_;
+  JsMutationEventObserver js_mutation_event_observer_;
+
+  void PumpLoop() {
+    message_loop_.RunAllPending();
+  }
+};
+
+TEST_F(JsMutationEventObserverTest, OnChangesApplied) {
+  InSequence dummy;
+
+  // We don't test with passwords as that requires additional setup.
+
+  // Build a list of example ChangeRecords.
+  sync_api::ChangeRecord changes[syncable::MODEL_TYPE_COUNT];
+  for (int i = syncable::AUTOFILL_PROFILE;
+       i < syncable::MODEL_TYPE_COUNT; ++i) {
+    changes[i].id = i;
+    switch (i % 3) {
+      case 0:
+        changes[i].action =
+            sync_api::ChangeRecord::ACTION_ADD;
+        break;
+      case 1:
+        changes[i].action =
+            sync_api::ChangeRecord::ACTION_UPDATE;
+        break;
+      default:
+        changes[i].action =
+            sync_api::ChangeRecord::ACTION_DELETE;
+        break;
+    }
+  }
+
+  // For each i, we call OnChangesApplied() with the first arg equal
+  // to i cast to ModelType and the second argument with the changes
+  // starting from changes[i].
+
+  // Set expectations for each data type.
+  for (int i = syncable::AUTOFILL_PROFILE;
+       i < syncable::MODEL_TYPE_COUNT; ++i) {
+    const std::string& model_type_str =
+        syncable::ModelTypeToString(syncable::ModelTypeFromInt(i));
+    DictionaryValue expected_details;
+    expected_details.SetString("modelType", model_type_str);
+    expected_details.SetString("writeTransactionId", "0");
+    ListValue* expected_changes = new ListValue();
+    expected_details.Set("changes", expected_changes);
+    for (int j = i; j < syncable::MODEL_TYPE_COUNT; ++j) {
+      expected_changes->Append(changes[j].ToValue());
+    }
+    EXPECT_CALL(mock_js_event_handler_,
+                HandleJsEvent("onChangesApplied",
+                             HasDetailsAsDictionary(expected_details)));
+  }
+
+  // Fire OnChangesApplied() for each data type.
+  for (int i = syncable::AUTOFILL_PROFILE;
+       i < syncable::MODEL_TYPE_COUNT; ++i) {
+    sync_api::ChangeRecordList
+        local_changes(changes + i, changes + arraysize(changes));
+    js_mutation_event_observer_.OnChangesApplied(
+        syncable::ModelTypeFromInt(i),
+        0, sync_api::ImmutableChangeRecordList(&local_changes));
+  }
+
+  PumpLoop();
+}
+
+TEST_F(JsMutationEventObserverTest, OnChangesComplete) {
+  InSequence dummy;
+
+  for (int i = syncable::FIRST_REAL_MODEL_TYPE;
+       i < syncable::MODEL_TYPE_COUNT; ++i) {
+    DictionaryValue expected_details;
+    expected_details.SetString(
+        "modelType",
+        syncable::ModelTypeToString(syncable::ModelTypeFromInt(i)));
+    EXPECT_CALL(mock_js_event_handler_,
+                HandleJsEvent("onChangesComplete",
+                             HasDetailsAsDictionary(expected_details)));
+  }
+
+  for (int i = syncable::FIRST_REAL_MODEL_TYPE;
+       i < syncable::MODEL_TYPE_COUNT; ++i) {
+    js_mutation_event_observer_.OnChangesComplete(
+        syncable::ModelTypeFromInt(i));
+  }
+  PumpLoop();
+}
+
+}  // namespace
+}  // namespace browser_sync