feat: impl FromNapiValue for serde_json::Number, fix it for Null, throw for impossible types (#1052)

fix #1013

Co-authored-by: zeroslope <jsx55242@foxmail.com>

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

@@ -123,6 +123,7 @@ Generated by [AVA](https://avajs.dev).
     }␊
     export function readPackageJson(): PackageJson␊
     export function getPackageJsonName(packageJson: PackageJson): string␊
+    export function testSerdeRoundtrip(data: any): any␊
     export function contains(source: string, target: string): boolean␊
     export function concatStr(s: string): string␊
     export function concatUtf16(s: string): string␊

examples/napi/__test__/values.spec.ts

@@ -80,6 +80,7 @@ import {
   receiveMutClassOrNumber,
   getStrFromObject,
   returnJsFunction,
+  testSerdeRoundtrip,
 } from '../'
 
 test('export const', (t) => {
@@ -299,6 +300,34 @@ test('serde-json', (t) => {
   t.is(getPackageJsonName(packageJson), 'napi-rs')
 })
 
+test('serde-roundtrip', (t) => {
+  t.is(testSerdeRoundtrip(1), 1)
+  t.is(testSerdeRoundtrip(1.2), 1.2)
+  t.is(testSerdeRoundtrip(-1), -1)
+
+  t.deepEqual(testSerdeRoundtrip([1, 1.2, -1]), [1, 1.2, -1])
+  t.deepEqual(testSerdeRoundtrip({ a: 1, b: 1.2, c: -1 }), {
+    a: 1,
+    b: 1.2,
+    c: -1,
+  })
+  t.throws(() => testSerdeRoundtrip(NaN))
+
+  t.is(testSerdeRoundtrip(null), null)
+
+  let err = t.throws(() => testSerdeRoundtrip(undefined))
+  t.is(err!.message, 'undefined cannot be represented as a serde_json::Value')
+
+  err = t.throws(() => testSerdeRoundtrip(() => {}))
+  t.is(
+    err!.message,
+    'JS functions cannot be represented as a serde_json::Value',
+  )
+
+  err = t.throws(() => testSerdeRoundtrip(Symbol.for('foo')))
+  t.is(err!.message, 'JS symbols cannot be represented as a serde_json::Value')
+})
+
 test('buffer', (t) => {
   let buf = getBuffer()
   t.is(buf.toString('utf-8'), 'Hello world')

examples/napi/index.d.ts

@@ -113,6 +113,7 @@ export interface PackageJson {
 }
 export function readPackageJson(): PackageJson
 export function getPackageJsonName(packageJson: PackageJson): string
+export function testSerdeRoundtrip(data: any): any
 export function contains(source: string, target: string): boolean
 export function concatStr(s: string): string
 export function concatUtf16(s: string): string

examples/napi/src/serde.rs

@@ -25,3 +25,8 @@ fn read_package_json() -> Result<PackageJson> {
 fn get_package_json_name(package_json: PackageJson) -> String {
   package_json.name
 }
+
+#[napi]
+fn test_serde_roundtrip(data: Value) -> Value {
+  data
+}