json-stable-stringify - npm Package Compare versions

Comparing version 0.1.0 to 0.1.1

index.js

@@ -8,2 +8,4 @@ var json = typeof JSON !== 'undefined' ? JSON : require('jsonify');
     if (typeof space === 'number') space = Array(space+1).join(' ');
+    var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
+    
     var cmp = opts.cmp && (function (f) {
@@ -19,5 +21,7 @@ return function (node) {
     
+    var seen = [];
     return (function stringify (node, level) {
         var indent = space ? ('\n' + new Array(level + 1).join(space)) : '';
         var colonSeparator = space ? ': ' : ':';
+        
         if (typeof node !== 'object' || node === null) {
@@ -35,2 +39,8 @@ return json.stringify(node);
         else {
+            if (seen.indexOf(node) !== -1) {
+                if (cycles) return stringify('__cycle__');
+                throw new TypeError('Converting circular structure to JSON');
+            }
+            else seen.push(node);
+            
             var keys = objectKeys(node).sort(cmp && cmp(node));
@@ -40,3 +50,6 @@ var out = [];
                 var key = keys[i];
-                var keyValue = stringify(key,0) + colonSeparator + stringify(node[key],level+1);
+                var keyValue = stringify(key,0)
+                    + colonSeparator
+                    + stringify(node[key],level+1)
+                ;
                 out.push(indent + space + keyValue);
@@ -43,0 +56,0 @@ }

package.json

 {
   "name": "json-stable-stringify",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results",
@@ -5,0 +5,0 @@ "main": "index.js",

test/nested.js

@@ -9,1 +9,21 @@ var test = require('tape');
 });
+
+test('cyclic (default)', function (t) {
+    t.plan(1);
+    var one = { a: 1 };
+    var two = { a: 2, one: one };
+    one.two = two;
+    try {
+    	stringify(one);
+    } catch (ex) {
+    	t.equal(ex.toString(), 'TypeError: Converting circular structure to JSON');
+    }
+});
+
+test('cyclic (specifically allowed)', function (t) {
+    t.plan(1);
+    var one = { a: 1 };
+    var two = { a: 2, one: one };
+    one.two = two;
+    t.equal(stringify(one, {cycles:true}), '{"a":1,"two":{"a":2,"one":"__cycle__"}}');
+});

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Improved metrics

Total package byte prevSize

10167

increased by9.94%

Lines of code

176

increased by18.92%

No dependency changes