Use serverClock in WriteResult

Author: op

src/firestore-document.js

@@ -111,7 +111,7 @@ MockFirestoreDocument.prototype.create = function (data, callback) {
       var base = self._getData();
       err = err || self._validateDoesNotExist(base);
       if (err === null) {
-        var time = Timestamp.fromDate(new Date());
+        var time = Timestamp.fromMillis(utils.getServerTime());
         var result = new WriteResult(time);
         self._dataChanged(data);
         resolve(result);

src/timestamp.js

@@ -6,8 +6,12 @@ function Timestamp(seconds, nanoseconds) {
 }
 
 Timestamp.fromDate = function(date) {
-  var sec = Math.floor(date.getTime() / 1000);
-  var ns = (date.getTime() % 1000) * 1000 * 1000;
+  return Timestamp.fromMillis(date.getTime());
+};
+
+Timestamp.fromMillis = function(ms) {
+  var sec = Math.floor(ms / 1000);
+  var ns = (ms % 1000) * 1000 * 1000;
   return new Timestamp(sec, ns);
 };
 

test/unit/firestore-document.js

@@ -10,6 +10,7 @@ chai.use(require('sinon-chai'));
 var expect = chai.expect;
 var _ = require('../../src/lodash');
 var Firestore = require('../../').MockFirestore;
+var Firebase = require('../../').MockFirebase;
 
 describe('MockFirestoreDocument', function () {
 
@@ -94,10 +95,14 @@ describe('MockFirestoreDocument', function () {
 
   describe('#create', function () {
     it('creates a new doc', function (done) {
+      Firebase.setClock(function() {
+        return 1234567890123;
+      });
       var createDoc = db.doc('createDoc');
 
       createDoc.create({prop: 'title'}).then(function (result) {
         expect(result).to.have.property('writeTime');
+        expect(result.writeTime.seconds).to.equal(1234567890);
       }).catch(done);
 
       createDoc.get().then(function (snap) {

test/unit/timestamp.js

@@ -13,6 +13,13 @@ describe('Timestamp', function () {
       expect(timestamp.nanoseconds).to.equal(123000000);
     });
   });
+  describe('fromMillis', function () {
+    it('should convert from milliseconds', function () {
+      var timestamp = Timestamp.fromMillis(1234567890123);
+      expect(timestamp.seconds).to.equal(1234567890);
+      expect(timestamp.nanoseconds).to.equal(123000000);
+    });
+  });
   describe('#toDate', function () {
     it('should convert to date', function () {
       var ts = new Timestamp(1234567890, 123456789);