src: expose V8's IsNativeError() in util bindings

cjihrig · cjihrig · commit e522bcd774c6 · 2017-04-25T12:25:55.000-04:00
Refs: #12400 PR-URL: #12546 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/src/node_util.cc b/src/node_util.cc
@@ -25,6 +25,7 @@ using v8::Value;
   V(isExternal, IsExternal)                                                   \
   V(isMap, IsMap)                                                             \
   V(isMapIterator, IsMapIterator)                                             \
+  V(isNativeError, IsNativeError)                                             \
   V(isPromise, IsPromise)                                                     \
   V(isRegExp, IsRegExp)                                                       \
   V(isSet, IsSet)                                                             \
diff --git a/test/parallel/test-util.js b/test/parallel/test-util.js
@@ -23,6 +23,7 @@
 const common = require('../common');
 const assert = require('assert');
 const util = require('util');
+const binding = process.binding('util');
 const context = require('vm').runInNewContext;
 
 // isArray
@@ -153,3 +154,20 @@ util.print('test');
 util.puts('test');
 util.debug('test');
 util.error('test');
+
+{
+  // binding.isNativeError()
+  assert.strictEqual(binding.isNativeError(new Error()), true);
+  assert.strictEqual(binding.isNativeError(new TypeError()), true);
+  assert.strictEqual(binding.isNativeError(new SyntaxError()), true);
+  assert.strictEqual(binding.isNativeError(new (context('Error'))()), true);
+  assert.strictEqual(binding.isNativeError(new (context('TypeError'))()), true);
+  assert.strictEqual(binding.isNativeError(new (context('SyntaxError'))()),
+                     true);
+  assert.strictEqual(binding.isNativeError({}), false);
+  assert.strictEqual(binding.isNativeError({ name: 'Error', message: '' }),
+                     false);
+  assert.strictEqual(binding.isNativeError([]), false);
+  assert.strictEqual(binding.isNativeError(Object.create(Error.prototype)),
+                     false);
+}
