Align Node error objects with Node 12.2.0.

Author: jdalton

src/errors.js

@@ -144,12 +144,23 @@ function init() {
     return class NodeError extends Super {
       constructor(...args) {
         const template = templateMap.get(code)
+
         super(template(...args))
 
-        if (code === "MODULE_NOT_FOUND") {
-          this.code = code
-          this.name = super.name
-        }
+        const name = toString(get(this, "name"))
+
+        // Add the error code to the name to include it in the stack trace.
+        Reflect.defineProperty(this, "name", {
+          configurable: true,
+          value: name + " [" + code + "]",
+          writable: true
+        })
+
+        // Access the stack to generate the error message including the error
+        // code from the name.
+        get(this, "stack")
+        // Reset the name to the actual name.
+        Reflect.deleteProperty(this, "name")
       }
 
       get code() {
@@ -159,14 +170,6 @@ function init() {
       set code(value) {
         setProperty(this, "code", value)
       }
-
-      get name() {
-        return super.name + " [" + code + "]"
-      }
-
-      set name(value) {
-        setProperty(this, "name", value)
-      }
     }
   }
 

test/misc-tests.js

@@ -49,30 +49,9 @@ const defNs = createNamespace({
 function checkError(error, code) {
   const { message } = error
 
-  checkErrorProps(error, code, message)
-  checkErrorCustomProps(error, code, message)
-  checkErrorProps(error, code, message)
-}
-
-function checkErrorCustomProps(error, code, message) {
-  error.code = "ERR_CUSTOM"
-
-  assert.strictEqual(error.code, "ERR_CUSTOM")
-  assert.strictEqual(error.toString(), "Error [" + code + "]: " + message)
-
-  error.name = "Custom"
-
-  assert.strictEqual(error.name, "Custom")
-  assert.strictEqual(error.toString(), "Custom: " + message)
-
-  Reflect.deleteProperty(error, "code")
-  Reflect.deleteProperty(error, "name")
-}
-
-function checkErrorProps(error, code, message) {
   assert.strictEqual(error.code, code)
-  assert.strictEqual(error.name, "Error [" + code + "]")
-  assert.strictEqual(error.toString(), "Error [" + code + "]: " + message)
+  assert.strictEqual(error.message, message)
+  assert.strictEqual(error.name, "Error")
   assert.deepStrictEqual(Object.keys(error), [])
   assert.deepStrictEqual(Object.getOwnPropertySymbols(error), [])
 }