NODE-477 Added test case showing insertOne with w:0 working as expected

Author: christkv

test/functional/crud_api_tests.js

@@ -793,6 +793,31 @@ exports['should correctly execute removeMany with no selector'] = {
       db.collection('t6_1').deleteMany(function(err, r) {
         test.equal(null, err);
 
+        db.close();
+        test.done();
+      });
+    });
+  }
+}
+
+exports['should correctly execute insertOne with w:0'] = {
+  // 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
+  metadata: { requires: { topology: ['single', 'replicaset', 'sharded', 'ssl', 'heap', 'wiredtiger'] } },
+  
+  // The actual test we wish to run
+  test: function(configuration, test) {
+    var db = configuration.newDbInstance(configuration.writeConcernMax(), {poolSize:1, auto_reconnect:false});
+    // Establish connection to db
+    db.open(function(err, db) {
+      test.equal(null, err);
+      
+      var col = db.collection('shouldCorrectlyExecuteInsertOneWithW0');
+      
+      col.insertOne({a:1}, {w:0}, function(err,result) {
+        test.equal(null, err);
+        test.equal(1, result.result.ok);
+
         db.close();
         test.done();
       });