Fixed test

test/db.test.js

@@ -251,8 +251,7 @@ describe('Database', function () {
     it('If a bulk insert violates a constraint, all changes are rolled back', function (done) {
       var docs = [{ a: 5, b: 'hello' }, { a: 42, b: 'world' }, { a: 5, b: 'bloup' }, { a: 7 }];
     
-      d.ensureIndex({ fieldName: 'a', unique: true });
-    
+      d.ensureIndex({ fieldName: 'a', unique: true }, function () {   // Important to specify callback here to make sure filesystem synced
         d.insert(docs, function (err) {
           err.errorType.should.equal('uniqueViolated');
         
@@ -266,6 +265,10 @@ describe('Database', function () {
             done();
           });
         });
+
+
+      });
+      
     });
 
     it('Can insert a doc with id 0', function (done) {