fix(napi-derive): return instance from non-default constructor class

Fix https://github.com/napi-rs/napi-rs/issues/933

examples/napi/__test__/typegen.spec.ts.md

@@ -145,11 +145,16 @@ Generated by [AVA](https://avajs.dev).
       /** This is static... */␊
       static getDogKind(): Kind␊
       returnOtherClass(): Dog␊
+      returnOtherClassWithCustomConstructor(): Bird␊
     }␊
     export class Dog {␊
       name: string␊
       constructor(name: string)␊
     }␊
+    export class Bird {␊
+      name: string␊
+      constructor(name: string)␊
+    }␊
     /** Smoking test for type generation */␊
     export class Blake2BHasher {␊
       static withKey(key: Blake2bKey): Blake2BHasher␊

examples/napi/__test__/values.spec.ts

@@ -70,6 +70,7 @@ import {
   returnNull,
   returnUndefined,
   Dog,
+  Bird,
 } from '../'
 
 test('export const', (t) => {
@@ -127,6 +128,7 @@ test('class', (t) => {
   dog.name = '可乐'
   t.is(dog.name, '可乐')
   t.deepEqual(dog.returnOtherClass(), new Dog('Doge'))
+  t.deepEqual(dog.returnOtherClassWithCustomConstructor(), new Bird('parrot'))
 })
 
 test('class factory', (t) => {

examples/napi/index.d.ts

@@ -135,11 +135,16 @@ export class Animal {
   /** This is static... */
   static getDogKind(): Kind
   returnOtherClass(): Dog
+  returnOtherClassWithCustomConstructor(): Bird
 }
 export class Dog {
   name: string
   constructor(name: string)
 }
+export class Bird {
+  name: string
+  constructor(name: string)
+}
 /** Smoking test for type generation */
 export class Blake2BHasher {
   static withKey(key: Blake2bKey): Blake2BHasher

examples/napi/src/class.rs

@@ -67,6 +67,11 @@ impl Animal {
       name: "Doge".to_owned(),
     }
   }
+
+  #[napi]
+  pub fn return_other_class_with_custom_constructor(&self) -> Bird {
+    Bird::new("parrot".to_owned())
+  }
 }
 
 #[napi(constructor)]
@@ -74,6 +79,19 @@ pub struct Dog {
   pub name: String,
 }
 
+#[napi]
+pub struct Bird {
+  pub name: String,
+}
+
+#[napi]
+impl Bird {
+  #[napi(constructor)]
+  pub fn new(name: String) -> Self {
+    Bird { name }
+  }
+}
+
 /// Smoking test for type generation
 #[napi]
 #[repr(transparent)]