fix: boron node version test failures

Author: nbbeeken

lib/db.js

@@ -440,7 +440,7 @@ Db.prototype.collection = function(name, options, callback) {
   }
 
   // Merge in all needed options and ensure correct writeConcern merging from db level
-  options = conditionallyMergeWriteConcern(options, this.s.options, COLLECTION_OPTION_KEYS, true);
+  options = conditionallyMergeWriteConcern(options, this.s.options);
 
   // Execute
   if (options == null || !options.strict) {

lib/utils.js

@@ -534,7 +534,9 @@ function decorateWithExplain(command, explain) {
 }
 
 const emitProcessWarning = msg =>
-  process.emitWarning(msg, { type: 'DeprecationWarning', code: MONGODB_WARNING_CODE });
+  +process.version[1] <= 6
+    ? process.emitWarning(msg, 'DeprecationWarning', MONGODB_WARNING_CODE)
+    : process.emitWarning(msg, { type: 'DeprecationWarning', code: MONGODB_WARNING_CODE });
 // eslint-disable-next-line no-console
 const emitConsoleWarning = msg => console.error(msg);
 const emitDeprecationWarning = process.emitWarning ? emitProcessWarning : emitConsoleWarning;

test/functional/deprecate_warning.test.js

@@ -71,10 +71,16 @@ describe('Deprecation Warnings', function() {
             .trim();
 
           // ensure warning message matches expected
-          expect(warning).to.equal(
-            '[MONGODB DRIVER] DeprecationWarning: testDeprecationFlags option [maxScan]' +
-              defaultMessage
-          );
+          if (+process.version[1] <= 6) {
+            expect(warning).to.equal(
+              'DeprecationWarning: testDeprecationFlags option [maxScan]' + defaultMessage
+            );
+          } else {
+            expect(warning).to.equal(
+              '[MONGODB DRIVER] DeprecationWarning: testDeprecationFlags option [maxScan]' +
+                defaultMessage
+            );
+          }
 
           // ensure each following line is from the stack trace, i.e. 'at config.deprecatedOptions.forEach.deprecatedOption'
           split.pop();