Proxy errors include EINVAL errno.

Author: rolftimmermans

src/proxy.cc

@@ -52,13 +52,13 @@ Napi::Value Proxy::Run(const Napi::CallbackInfo& info) {
     if (Env().IsExceptionPending()) return Env().Undefined();
 
     if (front->endpoints == 0) {
-        Napi::Error::New(Env(), "Front-end socket must be bound or connected")
+        ErrnoException(Env(), EINVAL, "Front-end socket must be bound or connected")
             .ThrowAsJavaScriptException();
         return Env().Undefined();
     }
 
     if (back->endpoints == 0) {
-        Napi::Error::New(Env(), "Back-end socket must be bound or connected")
+        ErrnoException(Env(), EINVAL, "Back-end socket must be bound or connected")
             .ThrowAsJavaScriptException();
         return Env().Undefined();
     }

test/unit/proxy-run-test.ts

@@ -56,6 +56,8 @@ for (const proto of testProtos("tcp", "ipc", "inproc")) {
       } catch (err) {
         assert.instanceOf(err, Error)
         assert.equal(err.message, "Back-end socket must be bound or connected")
+        assert.equal(err.code, "EINVAL")
+        assert.typeOf(err.errno, "number")
       }
     })
 
@@ -70,6 +72,8 @@ for (const proto of testProtos("tcp", "ipc", "inproc")) {
       } catch (err) {
         assert.instanceOf(err, Error)
         assert.equal(err.message, "Back-end socket must be bound or connected")
+        assert.equal(err.code, "EINVAL")
+        assert.typeOf(err.errno, "number")
       }
     })
   })