fix: use properly camel cased form of mapReduce for command

Author: mbroadst

lib/operations/map_reduce.js

@@ -60,7 +60,7 @@ class MapReduceOperation extends OperationBase {
     let options = this.options;
 
     const mapCommandHash = {
-      mapreduce: coll.collectionName,
+      mapReduce: coll.collectionName,
       map: map,
       reduce: reduce
     };

test/functional/collations.test.js

@@ -209,7 +209,7 @@ describe('Collation', function() {
     }
   });
 
-  it('Successfully pass through collation to mapreduce command', {
+  it('Successfully pass through collation to mapReduce command', {
     metadata: { requires: { generators: true, topology: 'single' } },
 
     test: function() {
@@ -223,7 +223,7 @@ describe('Collation', function() {
         var doc = request.document;
         if (doc.ismaster) {
           request.reply(primary[0]);
-        } else if (doc.mapreduce) {
+        } else if (doc.mapReduce) {
           commandResult = doc;
           request.reply({ ok: 1, result: 'tempCollection' });
         } else if (doc.endSessions) {

test/functional/command_write_concern.test.js

@@ -733,7 +733,7 @@ describe('Command Write Concern', function() {
     }
   });
 
-  it('successfully pass through writeConcern to dropIndexes command', {
+  it('successfully pass through writeConcern to mapReduce command', {
     metadata: {
       requires: {
         generators: true,
@@ -798,7 +798,7 @@ describe('Command Write Concern', function() {
           var doc = request.document;
           if (doc.ismaster) {
             request.reply(primary[0]);
-          } else if (doc.mapreduce) {
+          } else if (doc.mapReduce) {
             commandResult = doc;
             request.reply({ ok: 1, result: 'tempCollection' });
           } else if (doc.endSessions) {

test/functional/readconcern.test.js

@@ -447,13 +447,13 @@ describe('ReadConcern', function() {
             const reduce = 'function(k,vals) { return 1; }';
 
             // Listen to apm events
-            client.on('commandStarted', filterForCommands('mapreduce', started));
-            client.on('commandSucceeded', filterForCommands('mapreduce', succeeded));
+            client.on('commandStarted', filterForCommands('mapReduce', started));
+            client.on('commandSucceeded', filterForCommands('mapReduce', succeeded));
 
             // Execute mapReduce
             collection.mapReduce(map, reduce, { out: { replace: 'tempCollection' } }, err => {
               expect(err).to.not.exist;
-              validateTestResults(started, succeeded, 'mapreduce');
+              validateTestResults(started, succeeded, 'mapReduce');
               done();
             });
           }

test/functional/readpreference.test.js

@@ -256,7 +256,7 @@ describe('ReadPreference', function() {
   /**
    * @ignore
    */
-  it('Should fail due to not using mapreduce inline with read preference', {
+  it('Should fail due to not using mapReduce inline with read preference', {
     metadata: { requires: { mongodb: '>=2.6.0', topology: ['single', 'ssl'] } },
 
     // The actual test we wish to run

test/unit/bypass_validation.test.js

@@ -79,7 +79,7 @@ describe('bypass document validation', function() {
 
     test.server.setMessageHandler(request => {
       const doc = request.document;
-      if (doc.mapreduce) {
+      if (doc.mapReduce) {
         try {
           expect(doc.bypassDocumentValidation).equal(config.expected);
           request.reply({