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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.use serde::Serialize;use serde_json::json;use serde_v8::utils::{js_exec, v8_do};
#[derive(Debug, Serialize, PartialEq)]struct MathOp {  pub a: u64,  pub b: u64,  pub operator: Option<String>,}
// Utility JS code (obj equality, etc...)const JS_UTILS: &str = r#"// Shallow obj equality (don't use deep objs for now)function objEqual(a, b) {  const ka = Object.keys(a);  const kb = Object.keys(b);  return ka.length === kb.length && ka.every(k => a[k] === b[k]);}
function arrEqual(a, b) {  return a.length === b.length && a.every((v, i) => v === b[i]);}"#;const JS_POLLUTE: &str = r#"Object.defineProperty(Array.prototype, "0", {  set: function (v) {    throw new Error("Polluted Array 0 set");  },});
Object.defineProperty(Object.prototype, "a", {  set: (v) => {    throw new Error("Polluted Object 'a' set");  }});"#;
fn sercheck<T: Serialize>(val: T, code: &str, pollute: bool) -> bool {  let mut equal = false;
  v8_do(|| {    // Setup isolate    let isolate = &mut v8::Isolate::new(v8::CreateParams::default());    let handle_scope = &mut v8::HandleScope::new(isolate);    let context = v8::Context::new(handle_scope);    let scope = &mut v8::ContextScope::new(handle_scope, context);
    // Load util functions    js_exec(scope, JS_UTILS);    if pollute {      js_exec(scope, JS_POLLUTE);    }    // TryCatch scope (to catch pollution exceptions)    let scope = &mut v8::TryCatch::new(scope);
    // Set value as "x" in global scope    let global = context.global(scope);    let v8_key = serde_v8::to_v8(scope, "x").unwrap();    let v8_val = serde_v8::to_v8(scope, val).unwrap();    global.set(scope, v8_key, v8_val);
    // Pollution check    if let Some(message) = scope.message() {      let msg = message.get(scope).to_rust_string_lossy(scope);      panic!("JS Exception: {}", msg);    }
    // Execute equality check in JS (e.g: x == ...)    let v = js_exec(scope, code);    // Cast to bool    equal = serde_v8::from_v8(scope, v).unwrap();  });
  equal}
macro_rules! sertest {  ($fn_name:ident, $rust:expr, $src:expr) => {    #[test]    fn $fn_name() {      assert!(        sercheck($rust, $src, false),        "Expected: {} where x={:?}",        $src,        $rust,      );    }  };}
macro_rules! sertest_polluted {  ($fn_name:ident, $rust:expr, $src:expr) => {    #[test]    fn $fn_name() {      assert!(        sercheck($rust, $src, true),        "Expected: {} where x={:?}",        $src,        $rust,      );    }  };}
sertest!(ser_char, 'é', "x === 'é'");sertest!(ser_option_some, Some(true), "x === true");sertest!(ser_option_null, None as Option<bool>, "x === null");sertest!(ser_unit_null, (), "x === null");sertest!(ser_bool, true, "x === true");sertest!(ser_u64, 9007199254740991_u64, "x === 9007199254740991");sertest!(ser_big_int, 9007199254740992_i64, "x === 9007199254740992n");sertest!(  ser_neg_big_int,  -9007199254740992_i64,  "x === -9007199254740992n");sertest!(ser_f64, 12345.0, "x === 12345.0");sertest!(ser_string, "Hello", "x === 'Hello'");sertest!(ser_bytes, b"\x01\x02\x03", "arrEqual(x, [1, 2, 3])");sertest!(ser_vec_u64, vec![1, 2, 3, 4, 5], "arrEqual(x, [1,2,3,4,5])");sertest!(  ser_vec_string,  vec!["hello", "world"],  "arrEqual(x, ['hello', 'world'])");sertest!(ser_tuple, (123, true, ()), "arrEqual(x, [123, true, null])");sertest!(  ser_mathop,  MathOp {    a: 1,    b: 3,    operator: None  },  "objEqual(x, {a: 1, b: 3, operator: null})");
sertest!(  ser_map,  {    let map: std::collections::BTreeMap<&str, u32> =      vec![("a", 1), ("b", 2), ("c", 3)].drain(..).collect();    map  },  "objEqual(x, {a: 1, b: 2, c: 3})");
////// JSON tests: json!() compatibility////sertest!(ser_json_bool, json!(true), "x === true");sertest!(ser_json_null, json!(null), "x === null");sertest!(  ser_json_int,  json!(9007199254740991_u64),  "x === 9007199254740991");sertest!(  ser_json_big_int,  json!(9007199254740992_i64),  "x === 9007199254740992n");sertest!(  ser_json_neg_big_int,  json!(-9007199254740992_i64),  "x === -9007199254740992n");sertest!(ser_json_f64, json!(123.45), "x === 123.45");sertest!(ser_json_string, json!("Hello World"), "x === 'Hello World'");sertest!(ser_json_obj_empty, json!({}), "objEqual(x, {})");sertest!(  ser_json_obj,  json!({"a": 1, "b": 2, "c": true}),  "objEqual(x, {a: 1, b: 2, c: true})");sertest!(  ser_json_vec_int,  json!([1, 2, 3, 4, 5]),  "arrEqual(x, [1,2,3,4,5])");sertest!(  ser_json_vec_string,  json!(["Goodbye", "Dinosaurs 👋☄️"]),  "arrEqual(x, ['Goodbye', 'Dinosaurs 👋☄️'])");sertest!(  ser_json_tuple,  json!([true, 42, "nabla"]),  "arrEqual(x, [true, 42, 'nabla'])");
////// Pollution tests////
sertest_polluted!(  ser_polluted_obj,  MathOp {    a: 1,    b: 2,    operator: None  },  "objEqual(x, { a: 1, b: 2, operator: null })");
sertest_polluted!(  ser_polluted_tuple,  (true, 123, false),  "arrEqual(x, [true, 123, false])");
sertest_polluted!(ser_polluted_vec, vec![1, 2, 3], "arrEqual(x, [1, 2, 3])");