fix: preserve err.code

cabinjs · Jan 13, 2023 · bde7c3f · bde7c3f
1 parent 9af004d
commit bde7c3f
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Showing 2 changed files with 20 additions and 2 deletions.
diff --git a/src/index.js b/src/index.js
@@ -254,10 +254,16 @@ function maskProps(obj, props, options) {
 
   // for...in is much faster than Object.entries or any alternative
   for (const key in obj) {
-    if (typeof obj[key] === 'object')
+    if (typeof obj[key] === 'object') {
+      // preserve "err.code" property
+      let code;
+      if (obj[key] instanceof Error && obj[key].code) code = obj[key].code;
       obj[key] = maskProps(obj[key], props, options);
-    else if (isString(obj[key]))
+      // reset the masked code value
+      if (code) obj[key].code = code;
+    } else if (isString(obj[key])) {
       obj[key] = maskString(key, obj[key], props, options);
+    }
   }
 
   return obj;

diff --git a/test/basic.js b/test/basic.js
@@ -629,3 +629,15 @@ test('parses ip address', (t) => {
     '127.0.0.1'
   );
 });
+
+test('preserves error code', (t) => {
+  const err = new Error('oops');
+  err.code = 1;
+  const obj = parseRequest({
+    req: {
+      body: { err }
+    }
+  });
+  const body = JSON.parse(obj.request.body);
+  t.is(body.err.code, 1);
+});