chore: add tests for N-API symbol (#19205)

test_napi/src/lib.rs

@@ -23,6 +23,7 @@ pub mod primitives;
 pub mod promise;
 pub mod properties;
 pub mod strings;
+pub mod symbol;
 pub mod tsfn;
 pub mod typedarray;
 
@@ -160,6 +161,7 @@ unsafe extern "C" fn napi_register_module_v1(
   tsfn::init(env, exports);
   mem::init(env, exports);
   bigint::init(env, exports);
+  symbol::init(env, exports);
 
   init_cleanup_hook(env, exports);
 

test_napi/src/symbol.rs

@@ -0,0 +1,39 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use crate::assert_napi_ok;
+use crate::napi_get_callback_info;
+use crate::napi_new_property;
+use napi_sys::ValueType::napi_string;
+use napi_sys::*;
+
+extern "C" fn symbol_new(
+  env: napi_env,
+  info: napi_callback_info,
+) -> napi_value {
+  let (args, argc, _) = napi_get_callback_info!(env, info, 1);
+
+  let mut description: napi_value = std::ptr::null_mut();
+
+  if argc >= 1 {
+    let mut ty = -1;
+    assert_napi_ok!(napi_typeof(env, args[0], &mut ty));
+    assert_eq!(ty, napi_string);
+    description = args[0];
+  }
+
+  let mut symbol: napi_value = std::ptr::null_mut();
+  assert_napi_ok!(napi_create_symbol(env, description, &mut symbol));
+
+  symbol
+}
+
+pub fn init(env: napi_env, exports: napi_value) {
+  let properties = &[napi_new_property!(env, "symbolNew", symbol_new)];
+
+  assert_napi_ok!(napi_define_properties(
+    env,
+    exports,
+    properties.len(),
+    properties.as_ptr()
+  ));
+}

test_napi/symbol_test.js

@@ -0,0 +1,49 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { assert, assertEquals, loadTestLibrary } from "./common.js";
+
+const testSymbol = loadTestLibrary();
+
+Deno.test("napi symbol1", () => {
+  const sym = testSymbol.symbolNew("test");
+  assertEquals(sym.toString(), "Symbol(test)");
+
+  const myObj = {};
+  const fooSym = testSymbol.symbolNew("foo");
+  const otherSym = testSymbol.symbolNew("bar");
+  myObj.foo = "bar";
+  myObj[fooSym] = "baz";
+  myObj[otherSym] = "bing";
+  assertEquals(myObj.foo, "bar");
+  assertEquals(myObj[fooSym], "baz");
+  assertEquals(myObj[otherSym], "bing");
+});
+
+Deno.test("napi symbol2", () => {
+  const sym = testSymbol.symbolNew("test");
+  assertEquals(sym.toString(), "Symbol(test)");
+
+  const myObj = {};
+  const fooSym = testSymbol.symbolNew("foo");
+  myObj.foo = "bar";
+  myObj[fooSym] = "baz";
+
+  assertEquals(Object.keys(myObj), ["foo"]);
+  assertEquals(Object.getOwnPropertyNames(myObj), ["foo"]);
+  assertEquals(Object.getOwnPropertySymbols(myObj), [fooSym]);
+});
+
+Deno.test("napi symbol3", () => {
+  assert(testSymbol.symbolNew() !== testSymbol.symbolNew());
+  assert(testSymbol.symbolNew("foo") !== testSymbol.symbolNew("foo"));
+  assert(testSymbol.symbolNew("foo") !== testSymbol.symbolNew("bar"));
+
+  const foo1 = testSymbol.symbolNew("foo");
+  const foo2 = testSymbol.symbolNew("foo");
+  const object = {
+    [foo1]: 1,
+    [foo2]: 2,
+  };
+  assertEquals(object[foo1], 1);
+  assertEquals(object[foo2], 2);
+});