feat: match legacy toString output for NumberDecimal type

Author: tcannon91

snippets/mongocompat/mongotypes.js

@@ -443,9 +443,14 @@ if (typeof NumberDecimal !== 'undefined') {
     if (!NumberDecimal.prototype) {
         NumberDecimal.prototype = {};
     }
+    NumberDecimal.prototype.nativeToString = NumberDecimal.prototype.toString
 
     NumberDecimal.prototype.tojson = function() {
-        return this.toString();
+        return this.nativeToString();
+    };
+
+    NumberDecimal.prototype.toString = function() {
+        return `NumberDecimal("${this.nativeToString()}")`;
     };
 }
 

snippets/mongocompat/test.js

@@ -22,3 +22,6 @@ assert.strictEqual(minLong.bottom, 0);
 assert.strictEqual(minLong.exactValueString, "-9223372036854775808");
 const nl2 = NumberLong("200");
 assert.strictEqual(maxLong.compare(nl2), 1);
+const decimal = NumberDecimal("1.1");
+assert.strictEqual(decimal.toString(), 'NumberDecimal("1.1")');
+assert.strictEqual(decimal.tojson(), '1.1');