denoland-deno/test_napi/src/properties.rs

// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.

use napi_sys::PropertyAttributes::*;
use napi_sys::Status::napi_ok;
use napi_sys::*;
use std::ptr;

pub fn init(env: napi_env, exports: napi_value) {
  let mut number: napi_value = ptr::null_mut();
  assert!(unsafe { napi_create_double(env, 1.0, &mut number) } == napi_ok);

  // Key name as napi_value representing `v8::String`
  let mut name_value: napi_value = ptr::null_mut();
  assert!(
    unsafe {
      napi_create_string_utf8(
        env,
        "key_v8_string".as_ptr() as *const i8,
        usize::MAX,
        &mut name_value,
      )
    } == napi_ok
  );

  // Key symbol
  let mut symbol_description: napi_value = ptr::null_mut();
  let mut name_symbol: napi_value = ptr::null_mut();
  assert!(
    unsafe {
      napi_create_string_utf8(
        env,
        "key_v8_symbol".as_ptr() as *const i8,
        usize::MAX,
        &mut symbol_description,
      )
    } == napi_ok
  );
  assert!(
    unsafe { napi_create_symbol(env, symbol_description, &mut name_symbol) }
      == napi_ok
  );

  let properties = &[
    napi_property_descriptor {
      utf8name: "test_property_rw\0".as_ptr() as *const i8,
      name: ptr::null_mut(),
      method: None,
      getter: None,
      setter: None,
      data: ptr::null_mut(),
      attributes: enumerable | writable,
      value: number,
    },
    napi_property_descriptor {
      utf8name: "test_property_r\0".as_ptr() as *const i8,
      name: ptr::null_mut(),
      method: None,
      getter: None,
      setter: None,
      data: ptr::null_mut(),
      attributes: enumerable,
      value: number,
    },
    napi_property_descriptor {
      utf8name: ptr::null(),
      name: name_value,
      method: None,
      getter: None,
      setter: None,
      data: ptr::null_mut(),
      attributes: enumerable,
      value: number,
    },
    napi_property_descriptor {
      utf8name: ptr::null(),
      name: name_symbol,
      method: None,
      getter: None,
      setter: None,
      data: ptr::null_mut(),
      attributes: enumerable,
      value: number,
    },
  ];

  unsafe {
    napi_define_properties(env, exports, properties.len(), properties.as_ptr())
  };
}