Align with mongo implementation per comment

Author: LijieZhang1998

snippets/mongocompat/mongotypes.js

@@ -226,7 +226,7 @@ Array.shuffle = function(arr) {
     return arr;
 };
 
-Array.tojson = function(a, indent, nolint, depth) {
+Array.tojson = function(a, indent, nolint, depth, sortedKeys) {
     if (!Array.isArray(a)) {
         throw new Error("The first argument to Array.tojson must be an array");
     }
@@ -256,7 +256,7 @@ Array.tojson = function(a, indent, nolint, depth) {
         indent += "\t";
 
     for (var i = 0; i < a.length; i++) {
-        s += indent + tojson(a[i], indent, nolint, depth + 1, false);
+        s += indent + tojson(a[i], indent, nolint, depth + 1, sortedKeys);
         if (i < a.length - 1) {
             s += "," + elementSeparator;
         }

snippets/mongocompat/test.js

@@ -153,3 +153,11 @@ const objWithBson = {
 const sortedBsonJson = tojson(objWithBson, "", true, 0, true);
 assert(sortedBsonJson.indexOf('"a"') < sortedBsonJson.indexOf('"b"'), 'sortedkey=true should sort keys with BSON types');
 assert(sortedBsonJson.indexOf('"b"') < sortedBsonJson.indexOf('"c"'), 'sortedkey=true should sort keys with BSON types');
+const arrayWithObjects = [{ z: 1, a: 2 }, { y: 3, b: 4 }];
+const sortedArrayJson = Array.tojson(arrayWithObjects, "", true, 0, true);
+const unsortedArrayJson = Array.tojson(arrayWithObjects, "", true, 0, false);
+const defaultArrayJson = Array.tojson(arrayWithObjects, "", true, 0);
+assert(sortedArrayJson.indexOf('"a"') < sortedArrayJson.indexOf('"z"'), 'Array.tojson with sortedKeys=true should sort object keys in array elements');
+assert(sortedArrayJson.indexOf('"b"') < sortedArrayJson.indexOf('"y"'), 'Array.tojson with sortedKeys=true should sort object keys in array elements');
+assert(unsortedArrayJson.indexOf('"z"') < unsortedArrayJson.indexOf('"a"'), 'Array.tojson with sortedKeys=false should not sort keys');
+assert(defaultArrayJson.indexOf('"z"') < defaultArrayJson.indexOf('"a"'), 'Array.tojson without sortedKeys should not sort keys');