fix(findOneAndUpdate): ensure that update documents contain atomic operators

Fixes NODE-1470

Author: kvwalker

lib/collection.js

@@ -2107,6 +2107,12 @@ Collection.prototype.findOneAndUpdate = function(filter, update, options, callba
   if (update == null || typeof update !== 'object')
     throw toError('update parameter must be an object');
 
+  const err = checkForAtomicOperators(update);
+  if (err) {
+    if (typeof callback === 'function') return callback(err);
+    return this.s.promiseLibrary.reject(err);
+  }
+
   return executeOperation(this.s.topology, findOneAndUpdate, [
     this,
     filter,

test/functional/crud_api_tests.js

@@ -1023,6 +1023,35 @@ describe('CRUD API', function() {
     }
   });
 
+  it('should correctly throw error if update doc for findOneAndUpdate lacks atomic operator', function(done) {
+    let configuration = this.configuration;
+    let client = configuration.newClient(configuration.writeConcernMax(), { poolSize: 1 });
+    client.connect(function(err, client) {
+      expect(err).to.not.exist;
+      let db = client.db(configuration.db);
+      let col = db.collection('t21_1');
+      col.insertOne({ a: 1, b: 2, c: 3 }, function(err, r) {
+        expect(err).to.not.exist;
+        expect(r.insertedCount).to.equal(1);
+
+        // empty update document
+        col.findOneAndUpdate({ a: 1 }, {}, function(err, r) {
+          expect(err).to.exist;
+          expect(r).to.not.exist;
+
+          // update document non empty but still lacks atomic operator
+          col.findOneAndUpdate({ a: 1 }, { b: 5 }, function(err, r) {
+            expect(err).to.exist;
+            expect(r).to.not.exist;
+
+            client.close();
+            done();
+          });
+        });
+      });
+    });
+  });
+
   it('should correctly throw error if update doc for updateOne lacks atomic operator', {
     // Add a tag that our runner can trigger on
     // in this case we are setting that node needs to be higher than 0.10.X to run