test(napi): add class specs

.eslintrc.yml

@@ -203,11 +203,11 @@ rules:
 
 overrides:
   - files:
-      - ./**/*.js
+      - ./test_module/**/*.js
     plugins:
       - '@typescript-eslint'
     parserOptions:
-      project: ./tsconfig.json
+      project: ./test_module/tsconfig.json
     rules:
       '@typescript-eslint/prefer-nullish-coalescing': 0
       '@typescript-eslint/prefer-optional-chain': 0

test_module/__test__/class.spec.js

@@ -0,0 +1,13 @@
+const test = require('ava')
+
+const bindings = require('../index.node')
+
+test('should create class', (t) => {
+  const TestClass = bindings.createTestClass()
+  const fixture = 20
+  const testClass = new TestClass(fixture)
+  t.is(testClass.count, fixture)
+  const add = 101
+  testClass.addCount(add)
+  t.is(testClass.count, fixture + add)
+})

test_module/src/class.rs

@@ -0,0 +1,34 @@
+use std::convert::TryInto;
+
+use napi::{CallContext, JsFunction, JsNumber, JsObject, JsUndefined, Property, Result};
+
+#[js_function(1)]
+pub fn create_test_class(ctx: CallContext) -> Result<JsFunction> {
+  let add_count_method = Property::new("addCount").with_method(add_count);
+  let properties = vec![add_count_method];
+  ctx
+    .env
+    .define_class("TestClass", test_class_constructor, properties)
+}
+
+#[js_function(1)]
+pub fn test_class_constructor(mut ctx: CallContext<JsObject>) -> Result<JsUndefined> {
+  let count = ctx.get::<JsNumber>(0)?;
+  ctx
+    .this
+    .set_named_property("count", ctx.env.create_int32(count.try_into()?)?)?;
+  ctx.env.get_undefined()
+}
+
+#[js_function(1)]
+pub fn add_count(mut ctx: CallContext<JsObject>) -> Result<JsUndefined> {
+  let add: i32 = ctx.get::<JsNumber>(0)?.try_into()?;
+  let count: i32 = ctx
+    .this
+    .get_named_property::<JsNumber>("count")?
+    .try_into()?;
+  ctx
+    .this
+    .set_named_property("count", ctx.env.create_int32(count + add)?)?;
+  ctx.env.get_undefined()
+}

test_module/src/lib.rs

@@ -15,6 +15,7 @@ mod napi5;
 mod tokio_rt;
 
 mod buffer;
+mod class;
 mod either;
 mod external;
 mod function;
@@ -56,6 +57,7 @@ fn init(module: &mut Module) -> Result<()> {
   module.create_named_method("testCallFunctionWithThis", call_function_with_this)?;
   module.create_named_method("eitherNumberString", either_number_string)?;
   module.create_named_method("dynamicArgumentLength", dynamic_argument_length)?;
+  module.create_named_method("createTestClass", class::create_test_class)?;
   #[cfg(napi4)]
   module.create_named_method("testExecuteTokioReadfile", test_execute_tokio_readfile)?;
   #[cfg(napi4)]

test_module/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "allowJs": true
+  },
+  "include": ["."]
+}