C++ migration: make Timestamp class a part of public API (#944)

* move Timestamp from model/ to the root directory;
* move Timestamp to top-level firebase namespace and update all references;
* add conversions to and from native date types;
* add a specialization of std::hash;
* add comments to public member functions;
* rename nanos -> nanoseconds;
* add public headers, including Timestamp, to CMake;
* increase test coverage.

2 files changed, 0 insertions, 50 deletions

diff --git a/Firestore/core/test/firebase/firestore/model/CMakeLists.txt b/Firestore/core/test/firebase/firestore/model/CMakeLists.txt
index 0d581bc..2c2281f 100644
--- a/Firestore/core/test/firebase/firestore/model/CMakeLists.txt
+++ b/Firestore/core/test/firebase/firestore/model/CMakeLists.txt
@@ -24,7 +24,6 @@ cc_test(
     no_document_test.cc
     resource_path_test.cc
     snapshot_version_test.cc
-    timestamp_test.cc
   DEPENDS
     firebase_firestore_model
 )
diff --git a/Firestore/core/test/firebase/firestore/model/timestamp_test.cc b/Firestore/core/test/firebase/firestore/model/timestamp_test.cc
deleted file mode 100644
index 55ee378..0000000
--- a/Firestore/core/test/firebase/firestore/model/timestamp_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright 2018 Google
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "Firestore/core/src/firebase/firestore/model/timestamp.h"
-
-#include <vector>
-
-#include "gtest/gtest.h"
-
-namespace firebase {
-namespace firestore {
-namespace model {
-
-TEST(Timestamp, Getter) {
-  const Timestamp timestamp_zero;
-  EXPECT_EQ(0, timestamp_zero.seconds());
-  EXPECT_EQ(0, timestamp_zero.nanos());
-
-  const Timestamp timestamp(100, 200);
-  EXPECT_EQ(100, timestamp.seconds());
-  EXPECT_EQ(200, timestamp.nanos());
-
-  const Timestamp timestamp_now = Timestamp::Now();
-  EXPECT_LT(0, timestamp_now.seconds());
-  EXPECT_LE(0, timestamp_now.nanos());
-}
-
-TEST(Timestamp, Comparison) {
-  EXPECT_TRUE(Timestamp() < Timestamp(1, 2));
-  EXPECT_TRUE(Timestamp(1, 2) < Timestamp(2, 1));
-  EXPECT_TRUE(Timestamp(2, 1) < Timestamp(2, 2));
-}
-
-}  // namespace model
-}  // namespace firestore
-}  // namespace firebase