pkg/analyzer/lib/src/test_utilities/mock_sdk.dart

// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:convert';

import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/dart/analysis/experiments.dart';
import 'package:analyzer/src/generated/sdk.dart';
import 'package:meta/meta.dart';

final MockSdkLibrary _LIB_ASYNC = MockSdkLibrary('async', [
  MockSdkLibraryUnit('async/async.dart', '''
library dart.async;

import 'dart:_internal' show Since;
import 'dart:math';

part 'stream.dart';

abstract class Future<T> {
  factory Future(FutureOr<T> computation()) {
    throw 0;
  }

  factory Future.delayed(Duration duration, [FutureOr<T> computation()?]) {
    throw 0;
  }

  factory Future.error(Object error, [StackTrace? stackTrace]) {
    throw 0;
  }

  factory Future.microtask(FutureOr<T> computation()) {
    throw 0;
  }

  factory Future.value([FutureOr<T>? result]) {
    throw 0;
  }

  Future<T> catchError(Function onError, {bool test(Object error)});

  Future<R> then<R>(FutureOr<R> onValue(T value), {Function? onError});

  Future<T> whenComplete(action());

  static Future<List<T>> wait<T>(Iterable<Future<T>> futures,
    {void cleanUp(T successValue)?}) => throw 0;
}

abstract class FutureOr<T> {}

abstract class Completer<T> {
  factory Completer() {
    throw 0;
  }

  factory Completer.sync() {
    throw 0;
  }

  Future<T> get future;
  bool get isCompleted;

  void complete([FutureOr<T>? value]);
  void completeError(Object error, [StackTrace? stackTrace]);
}

abstract class Timer {
  factory Timer(Duration duration, void Function() callback) {
    throw 0;
  }
  static void run(void callback()) {}
}

@Since("2.15")
void unawaited(Future<void>? future) {}
'''),
  MockSdkLibraryUnit('async/stream.dart', r'''
part of dart.async;

abstract class Stream<T> {
  Stream();
  factory Stream.fromIterable(Iterable<T> data) {
    throw 0;
  }

  @Since("2.5")
  factory Stream.value(T value) {
    throw 0;
  }

  Future<T> get first;

  StreamSubscription<T> listen(void onData(T event)?,
      {Function? onError, void onDone()?, bool? cancelOnError});

  Stream<T> handleError(Function onError, {bool test(dynamic error)});
}

abstract class StreamIterator<T> {}

abstract class StreamSubscription<T> {
  bool get isPaused;

  Future<E> asFuture<E>([E? futureValue]);
  Future cancel();
  void onData(void handleData(T data)?);
  void onError(Function? handleError);
  void onDone(void handleDone()?);
  void pause([Future<void>? resumeSignal]);
  void resume();
}

abstract class StreamTransformer<S, T> {}
'''),
]);

final MockSdkLibrary _LIB_ASYNC2 = MockSdkLibrary('async2', [
  MockSdkLibraryUnit('async2/async2.dart', '''
library dart.async2;

class Future {}
'''),
]);

final MockSdkLibrary _LIB_COLLECTION = MockSdkLibrary('collection', [
  MockSdkLibraryUnit('collection/collection.dart', '''
library dart.collection;

abstract class HashMap<K, V> implements Map<K, V> {
  external factory HashMap(
      {bool Function(K, K)? equals,
      int Function(K)? hashCode,
      bool Function(dynamic)? isValidKey});

  external factory HashMap.identity();

  factory HashMap.from(Map<dynamic, dynamic> other) {
    throw 0;
  }

  factory HashMap.of(Map<K, V> other) {
    throw 0;
  }

  factory HashMap.fromIterable(Iterable iterable,
      {K Function(dynamic element)? key, V Function(dynamic element)? value}) {
    throw 0;
  }

  factory HashMap.fromIterables(Iterable<K> keys, Iterable<V> values) {
    throw 0;
  }

  @Since("2.1")
  factory HashMap.fromEntries(Iterable<MapEntry<K, V>> entries) {
    throw 0;
  }
}

abstract mixin class IterableMixin<E> implements Iterable<E> { }

abstract class LinkedHashMap<K, V> implements Map<K, V> {
  external factory LinkedHashMap(
      {bool Function(K, K)? equals,
      int Function(K)? hashCode,
      bool Function(dynamic)? isValidKey});

  external factory LinkedHashMap.identity();

  factory LinkedHashMap.from(Map<dynamic, dynamic> other) {
    throw 0;
  }

  factory LinkedHashMap.of(Map<K, V> other) {
    throw 0;
  }

  factory LinkedHashMap.fromIterable(Iterable iterable,
      {K Function(dynamic element)? key, V Function(dynamic element)? value}) {
    throw 0;
  }

  factory LinkedHashMap.fromIterables(Iterable<K> keys, Iterable<V> values) {
    throw 0;
  }

  @Since("2.1")
  factory LinkedHashMap.fromEntries(Iterable<MapEntry<K, V>> entries) {
    throw 0;
  }
}

abstract class LinkedHashSet<E> implements Set<E> {
  external factory LinkedHashSet(
      {bool Function(E, E)? equals,
      int Function(E)? hashCode,
      bool Function(dynamic)? isValidKey});

  external factory LinkedHashSet.identity();

  factory LinkedHashSet.from(Iterable<dynamic> elements) {
    throw 0;
  }

  factory LinkedHashSet.of(Iterable<E> elements) {
    throw 0;
  }
}

abstract base mixin class LinkedListEntry<E extends LinkedListEntry<E>> { }

abstract mixin class ListMixin<E> implements List<E> { }

abstract mixin class MapMixin<K, V> implements Map<K, V> { }

abstract mixin class SetMixin<E> implements Set<E> { }

abstract class Queue<E> implements Iterable<E> {
  bool remove(Object? value);
}
'''),
]);

final MockSdkLibrary _LIB_CONVERT = MockSdkLibrary('convert', [
  MockSdkLibraryUnit('convert/convert.dart', '''
library dart.convert;

import 'dart:async';

abstract class Converter<S, T> implements StreamTransformer {}

abstract class Encoding {}

class JsonDecoder extends Converter<String, Object> {}

const JsonCodec json = JsonCodec();

class JsonCodec {
  const JsonCodec();
  String encode(Object? value, {Object? toEncodable(dynamic object)?}) => '';
}

abstract mixin class StringConversionSink { }

typedef StringConversionSinkMixin = StringConversionSink;

String jsonEncode(Object? object,
        {Object? toEncodable(Object? nonEncodable)?}) => '';
'''),
]);

final MockSdkLibrary _LIB_CORE = MockSdkLibrary('core', [
  MockSdkLibraryUnit('core/core.dart', '''
library dart.core;

import "dart:_internal" hide Symbol;
import "dart:_internal" as internal show Symbol;

@Since("2.1")
export 'dart:async' show Future, Stream;

const deprecated = const Deprecated("next release");

const override = const _Override();

external bool identical(Object? a, Object? b);

void print(Object? object) {}

class ArgumentError extends Error {
  ArgumentError([message]);

  @Since("2.1")
  static T checkNotNull<@Since("2.8") T>(T? argument, [String? name]) => argument!;
}

abstract final class BigInt implements Comparable<BigInt> {
  int compareTo(BigInt other) => 0;
  static BigInt parse(String source, {int? radix}) => throw 0;
}

abstract final class bool extends Object {
  external const factory bool.fromEnvironment(String name,
      {bool defaultValue = false});

  external const factory bool.hasEnvironment(String name);

  @Since("2.1")
  bool operator &(bool other);

  @Since("2.1")
  bool operator |(bool other);

  @Since("2.1")
  bool operator ^(bool other);
}

abstract class Comparable<T> {
  int compareTo(T other);
  static int compare(Comparable a, Comparable b) => a.compareTo(b);
}

typedef Comparator<T> = int Function(T a, T b);

class DateTime extends Object {
  external DateTime._now();
  DateTime.now() : this._now();
  external bool isBefore(DateTime other);
  external int get millisecondsSinceEpoch;
}

class Deprecated extends Object {
  final String? message;
  final _DeprecationKind _kind;
  const Deprecated(this.message) : _kind = _DeprecationKind.use;
  const Deprecated.implement([this.message])
    : _kind = _DeprecationKind.implement;
  const Deprecated.extend([this.message]) : _kind = _DeprecationKind.extend;
  const Deprecated.subclass([this.message]) : _kind = _DeprecationKind.subclass;
  const Deprecated.instantiate([this.message])
    : _kind = _DeprecationKind.instantiate;
  const Deprecated.mixin([this.message]) : _kind = _DeprecationKind.mixin;
}

enum _DeprecationKind {
  use, implement, extend, subclass, instantiate, mixin;
}

class pragma {
  final String name;
  final Object? options;
  const pragma(this.name, [this.options]);
}

abstract final class double extends num {
  static const double nan = 0.0 / 0.0;
  static const double infinity = 1.0 / 0.0;
  static const double negativeInfinity = -infinity;
  static const double minPositive = 5e-324;
  static const double maxFinite = 1.7976931348623157e+308;

  bool get isNaN;
  double get sign;
  double operator %(num other);
  double operator *(num other);
  double operator +(num other);
  double operator -(num other);
  double operator -();
  double operator /(num other);
  int operator ~/(num other);

  double abs();
  int ceil();
  double ceilToDouble();
  int floor();
  double floorToDouble();
  double remainder(num other);
  int round();
  double roundToDouble();
  int truncate();
  double truncateToDouble();

  external static double parse(String source,
      [@deprecated double onError(String source)?]);

  external static double? tryParse(String source);
}

class Duration implements Comparable<Duration> {
  static const Duration zero = Duration(seconds: 0);

  const Duration({int days = 0,
      int hours = 0,
      int minutes = 0,
      int seconds = 0,
      int milliseconds = 0,
      int microseconds = 0});

  int compareTo(Duration other) => 0;
}

@Since("2.14")
abstract class Enum {
  // These two getters are a departure here, from the real SDK. Here we have
  // concrete getters; the SDK has abstract gettesr. The real implementations
  // of enums require a significant amount of desugaring.
  // (See the spec:
  // https://github.com/dart-lang/language/blob/main/accepted/2.17/enhanced-enums/feature-specification.md#implementation).
  // As an alternative to desugaring, we make these getters concrete.
  int get index => -1; // Enum; this comment is necessary for notification_navigation_test.
  String get _name => '';
}

abstract class _Enum implements Enum {
  final int index;
  final String _name;
  const _Enum(this.index, this._name);
}

class Error {
  Error();
  static String safeToString(Object? object) => '';
  external StackTrace? get stackTrace;
}

class Exception {
  factory Exception([var message]) {
    throw 0;
  }
}

class FormatException implements Exception {}

abstract final class Function {}

abstract final class int extends num {
  external const factory int.fromEnvironment(String name,
      {int defaultValue = 0});

  bool get isEven => false;
  bool get isNegative;
  bool get isOdd;
  int get sign;

  int operator &(int other);
  int operator -();
  int operator <<(int shiftAmount);
  int operator >>(int shiftAmount);
  int operator >>>(int shiftAmount);
  int operator ^(int other);
  int operator |(int other);
  int operator ~();

  int abs();
  int ceil();
  int gcd(int other);
  String toString();
  int truncate();

  external static int parse(String source,
      {int? radix, @deprecated int onError(String source)?});

  external static int? tryParse(String source, {int? radix});
}

abstract class Invocation {}

abstract mixin class Iterable<E> {
  E get first;
  bool get isEmpty;
  bool get isNotEmpty;
  Iterator<E> get iterator;
  int get length;

  const Iterable();

  const factory Iterable.empty() = EmptyIterable<E>;

  bool contains(Object? element);

  Iterable<T> expand<T>(Iterable<T> toElements(E element));

  E firstWhere(bool test(E element), {E orElse()?});

  T fold<T>(T initialValue, T combine(T previousValue, E element));

  void forEach(void action(E element));

  E lastWhere(bool test(E element), {E orElse()?});

  Iterable<T> map<T>(T toElement(E e));

  E singleWhere(bool test(E element), {E orElse()?});

  List<E> toList({bool growable = true});

  Set<E> toSet();

  Iterable<E> where(bool test(E element));
  Iterable<T> whereType<T>();
}

abstract class Iterator<E> {
  E get current;
  bool moveNext();
}

abstract class List<E> implements Iterable<E> {
  external factory List.filled(int length, E fill, {bool growable = false});
  external factory List.empty({bool growable = false});
  external factory List.from(Iterable elements, {bool growable = true});
  external factory List.of(Iterable<E> elements, {bool growable = true});
  external factory List.generate(int length, E generator(int index),
      {bool growable = true});
  external factory List.unmodifiable(Iterable elements);

  E get last => throw 0;
  set length(int newLength) {}
  E operator [](int index);
  void operator []=(int index, E value);
  void set first(E value);

  void add(E value);
  void addAll(Iterable<E> iterable);
  Map<int, E> asMap();
  void clear();
  int indexOf(E element, [int start = 0]);
  bool remove(Object? value);

  E removeLast();
}

abstract class Map<K, V> {
  external factory Map();
  external factory Map.from(Map other);
  external Map.of(Map<K, V> other);
  external factory Map.unmodifiable(Map<dynamic, dynamic> other);
  external factory Map.identity();

  external factory Map.fromIterable(Iterable iterable,
      {K key(dynamic element)?, V value(dynamic element)?});

  external factory Map.fromIterables(Iterable<K> keys, Iterable<V> values);
  external factory Map.fromEntries(Iterable<MapEntry<K, V>> entries);

  Iterable<K> get keys;
  bool get isEmpty;
  bool get isNotEmpty;
  int get length;
  Iterable<V> get values;

  V? operator [](Object? key);
  void operator []=(K key, V value);

  void addAll(Map<K, V> other);
  Map<RK, RV> cast<RK, RV>();
  bool containsKey(Object? key);
  bool containsValue(Object? value);
  void forEach(void action(K key, V value));
  V putIfAbsent(K key, V ifAbsent());
  V? remove(Object? key);
}

final class Null extends Object {
  factory Null._uninstantiable() {
    throw 0;
  }
}

final class MapEntry<K, V> {
  final K key;
  final V value;
  const factory MapEntry(K key, V value) = MapEntry<K, V>._;
  const MapEntry._(this.key, this.value);
}

sealed class num implements Comparable<num> {
  num operator %(num other);
  num operator *(num other);
  num operator +(num other);
  num operator -(num other);
  num operator -();
  double operator /(num other);
  bool operator <(num other);
  int operator <<(int other);
  bool operator <=(num other);
  bool operator ==(Object other);
  bool operator >(num other);
  bool operator >=(num other);
  int operator >>(int other);
  int operator ^(int other);
  int operator |(int other);
  int operator ~();
  int operator ~/(num other);

  num abs();
  num clamp(num lowerLimit, num upperLimit);
  int floor();
  num remainder(num other);
  int round();
  double toDouble();
  int toInt();
}

abstract class Match {
  int get start;
}

class Object {
  const Object();

  external int get hashCode;
  external Type get runtimeType;

  external bool operator ==(Object other);

  external String toString();
  external dynamic noSuchMethod(Invocation invocation);

  @Since("2.14")
  static int hash(Object? object1, Object? object2) => 0;

  @Since("2.14")
  static int hashAll(Iterable<Object?> objects) => 0;

  @Since("2.14")
  static int hashAllUnordered(Iterable<Object?> objects) => 0;
}

abstract class Pattern {
  Iterable<Match> allMatches(String string, [int start = 0]);
}

abstract final class Record {}

abstract class RegExp implements Pattern {
  external factory RegExp(String source, {bool unicode = false});
}

abstract class Set<E> implements Iterable<E> {
  external factory Set();
  external factory Set.identity();
  external factory Set.from(Iterable elements);
  external factory Set.of(Iterable<E> elements);

  Set<R> cast<R>();

  bool add(E value);
  void addAll(Iterable<E> elements);
  bool containsAll(Iterable<Object?> other);
  Set<E> difference(Set<Object?> other);
  Set<E> intersection(Set<Object?> other);
  E? lookup(Object? object);
  bool remove(Object? value);
  void removeAll(Iterable<Object?> elements);
  void retainAll(Iterable<Object?> elements);

  static Set<T> castFrom<S, T>(Set<S> source, {Set<R> Function<R>()? newSet}) =>
      throw '';
}

abstract class Sink {
  void close();
}

class StackTrace {}

abstract final class String implements Comparable<String>, Pattern {
  external factory String.fromCharCodes(Iterable<int> charCodes,
      [int start = 0, int? end]);

  external factory String.fromCharCode(int charCode);

  external const factory String.fromEnvironment(String name,
      {String defaultValue = ""});

  List<int> get codeUnits;
  bool get isEmpty => false;
  bool get isNotEmpty => false;
  int get length => 0;

  bool operator ==(Object other);
  String operator [](int index);
  String operator +(String other);
  String operator *(int times);

  int codeUnitAt(int index);
  bool contains(String other, [int startIndex = 0]);
  int indexOf(Pattern pattern, [int start = 0]);
  int lastIndexOf(Pattern pattern, [int? start]);
  bool startsWith(Pattern pattern, [int index = 0]);
  List<String> split(Pattern pattern);
  String splitMapJoin(Pattern pattern,
      {String Function(Match)? onMatch, String Function(String)? onNonMatch});
  String substring(int startIndex, [int? endIndex]);
  String toLowerCase();
  String toUpperCase();
}

class StringBuffer implements StringSink {
  external void write(Object? object);
}

abstract interface class StringSink {}

class Symbol {
  const factory Symbol(String name) = internal.Symbol;
}

class Type {}

class TypeError extends Error {}

class UnsupportedError {
  UnsupportedError(String message);
}

class Uri {
  factory Uri({
    String? scheme,
    String? userInfo,
    String? host,
    int? port,
    String? path,
    Iterable<String>? pathSegments,
    String? query,
    Map<String, dynamic /*String?|Iterable<String>*/ >? queryParameters,
    String? fragment,
  }) {
    throw 0;
  }

  static List<int> parseIPv6Address(String host, [int start = 0, int? end]) {
    throw 0;
  }
}

class _Override {
  const _Override();
}

@Since("2.15")
extension EnumName on Enum {
  String get name => _name;
}
'''),
]);

final MockSdkLibrary _LIB_FFI = MockSdkLibrary('ffi', [
  MockSdkLibraryUnit('ffi/ffi.dart', '''
@Since('2.6')
library dart.ffi;

import 'dart:typed_data';

abstract final class NativeType {}

@Since('3.4')
abstract final class SizedNativeType implements NativeType {}

@Since('2.9')
abstract final class Handle implements NativeType {}

@Since('2.12')
abstract base class Opaque implements NativeType {}

final class Void implements NativeType {}

final class Int8 implements SizedNativeType {
  const Int8();
}

final class Uint8 implements SizedNativeType {
  const Uint8();
}

final class Int16 implements SizedNativeType {
  const Int16();
}

final class Uint16 implements SizedNativeType {
  const Uint16();
}

final class Int32 implements SizedNativeType {
  const Int32();
}

final class Uint32 implements SizedNativeType {
  const Uint32();
}

final class Int64 implements SizedNativeType {
  const Int64();
}

final class Uint64 implements SizedNativeType {
  const Uint64();
}

final class Float implements SizedNativeType {
  const Float();
}

final class Double implements SizedNativeType {
  const Double();
}

@AbiSpecificIntegerMapping({
  Abi.androidArm: Int32(),
  Abi.androidArm64: Int64(),
  Abi.androidIA32: Int32(),
  Abi.androidX64: Int64(),
  Abi.androidRiscv64: Int64(),
  Abi.fuchsiaArm64: Int64(),
  Abi.fuchsiaX64: Int64(),
  Abi.fuchsiaRiscv64: Int64(),
  Abi.iosArm: Int32(),
  Abi.iosArm64: Int64(),
  Abi.iosX64: Int64(),
  Abi.linuxArm: Int32(),
  Abi.linuxArm64: Int64(),
  Abi.linuxIA32: Int32(),
  Abi.linuxX64: Int64(),
  Abi.linuxRiscv32: Int32(),
  Abi.linuxRiscv64: Int64(),
  Abi.macosArm64: Int64(),
  Abi.macosX64: Int64(),
  Abi.windowsArm64: Int64(),
  Abi.windowsIA32: Int32(),
  Abi.windowsX64: Int64(),
})
final class IntPtr extends AbiSpecificInteger {
  const IntPtr();
}

final class Pointer<T extends NativeType> implements SizedNativeType {
  external factory Pointer.fromAddress(int ptr);

  static Pointer<NativeFunction<T>> fromFunction<T extends Function>(
      @DartRepresentationOf("T") Function f,
      [Object exceptionalReturn]) {}

  external Pointer<U> cast<U extends NativeType>();

}

final Pointer<Never> nullptr = Pointer.fromAddress(0);

class NativeCallable<T extends Function> {
  NativeCallable.isolateLocal(
      @DartRepresentationOf("T") Function callback,
      {Object? exceptionalReturn}) {}

  NativeCallable.listener(@DartRepresentationOf("T") Function callback) {}

  Pointer<NativeFunction<T>> get nativeFunction;

  void close();
}

extension NativeFunctionPointer<NF extends Function>
    on Pointer<NativeFunction<NF>> {
  external DF asFunction<DF extends Function>({bool isLeaf = false});
}

abstract final class _Compound implements NativeType {}

abstract base class Struct extends _Compound implements SizedNativeType {
  @Since('3.4')
  external static T create<T extends Struct>([TypedData typedData, int offset]);
}

@Since('2.14')
abstract base class Union extends _Compound implements SizedNativeType {
  @Since('3.4')
  external static T create<T extends Union>([TypedData typedData, int offset]);
}

extension IntAddress on int {
  external Pointer<Never> address;
}

@Since('2.13')
final class Packed {
  final int memberAlignment;

  const Packed(this.memberAlignment);
}

abstract final class DynamicLibrary {
  external factory DynamicLibrary.open(String name);

  external Pointer<T> lookup<T extends NativeType>(String symbolName);
}

extension DynamicLibraryExtension on DynamicLibrary {
  external F lookupFunction<T extends Function, F extends Function>(
      String symbolName, {bool isLeaf:false});
}

abstract final class NativeFunction<T extends Function> implements NativeType {}

final class DartRepresentationOf {
  const DartRepresentationOf(String nativeType);
}

@Since('2.13')
final class Array<T extends NativeType> extends _Compound {
  const factory Array(
    int dimension1, [
    int dimension2,
    int dimension3,
    int dimension4,
    int dimension5,
  ]) = _ArraySize<T>;

  const factory Array.multi(List<int> dimensions) = _ArraySize<T>.multi;

  @Since('3.6')
  const factory Array.variable([
    int dimension2,
    int dimension3,
    int dimension4,
    int dimension5,
  ]) = _ArraySize<T>.variable;

  @Since('3.7')
  const factory Array.variableWithVariableDimension([
    int dimension1,
    int dimension2,
    int dimension3,
    int dimension4,
    int dimension5,
  ]) = _ArraySize<T>.variableWithVariableDimension;

  @Since('3.6')
  const factory Array.variableMulti(
    List<int> dimensions, {
    @Since('3.7') int variableDimension,
  }) = _ArraySize<T>.variableMulti;
}

final class _ArraySize<T extends NativeType> implements Array<T> {
  final int? dimension1;
  final int? dimension2;
  final int? dimension3;
  final int? dimension4;
  final int? dimension5;

  final List<int>? dimensions;

  final int? variableDimension;

  const _ArraySize(
    this.dimension1, [
    this.dimension2,
    this.dimension3,
    this.dimension4,
    this.dimension5,
  ])  : dimensions = null,
        variableDimension = null;

  const _ArraySize.multi(this.dimensions)
      : dimension1 = null,
        dimension2 = null,
        dimension3 = null,
        dimension4 = null,
        dimension5 = null,
        variableDimension = null;

  const _ArraySize.variable([
    this.dimension2,
    this.dimension3,
    this.dimension4,
    this.dimension5,
  ])  : dimension1 = 0,
        dimensions = null,
        variableDimension = 0;

  const _ArraySize.variableWithVariableDimension([
    this.dimension1,
    this.dimension2,
    this.dimension3,
    this.dimension4,
    this.dimension5,
  ])  : dimensions = null,
        variableDimension = dimension1;

  const _ArraySize.variableMulti(
    List<int> nestedDimensions, {
    int variableDimension = 0,
  })  : dimensions = nestedDimensions,
        dimension1 = null,
        dimension2 = null,
        dimension3 = null,
        dimension4 = null,
        dimension5 = null,
        variableDimension = variableDimension;
}

extension StructPointer<T extends Struct> on Pointer<T> {
  external T get ref;

  external T operator [](int index);

  @Since('3.7')
  external T refWithFinalizer(
    Pointer<NativeFinalizerFunction> finalizer, {
    Pointer<Void>? token,
  });
}

@Since('2.19')
final class Native<T> {
  final String? symbol;
  final String? asset;
  final bool isLeaf;

  const Native({
    this.asset,
    this.isLeaf: false,
    this.symbol,
  });

  external static Pointer<T> addressOf<T extends NativeType>(
      @DartRepresentationOf('T') Object object);
}

final class DefaultAsset {
  final String id;
  const DefaultAsset(this.id);
}

final class Asset {
  final String asset;
  const Asset(this.asset);
}

final class Abi {
  static const androidArm = _androidArm;
  static const androidArm64 = _androidArm64;
  static const androidIA32 = _androidIA32;
  static const linuxX64 = _linuxX64;
  static const macosX64 = _macosX64;

  static const _androidArm = Abi._(_Architecture.arm, _OS.android);
  static const _androidArm64 = Abi._(_Architecture.arm64, _OS.android);
  static const _androidIA32 = Abi._(_Architecture.ia32, _OS.android);
  static const _linuxX64 = Abi._(_Architecture.x64, _OS.linux);
  static const _macosX64 = Abi._(_Architecture.x64, _OS.macos);

  final _OS _os;

  final _Architecture _architecture;

  const Abi._(this._architecture, this._os);
}

enum _Architecture {
  arm,
  arm64,
  ia32,
  x64,
}

enum _OS {
  android,
  fuchsia,
  ios,
  linux,
  macos,
  windows,
}

@Since('2.16')
base class AbiSpecificInteger implements SizedNativeType {
  const AbiSpecificInteger();
}

@Since('2.16')
final class AbiSpecificIntegerMapping {
  final Map<Abi, NativeType> mapping;

  const AbiSpecificIntegerMapping(this.mapping);
}

@AbiSpecificIntegerMapping({})
final class Int extends AbiSpecificInteger {
  const Int();
}

@Since('2.17')
abstract interface class Finalizable {
  factory Finalizable._() => throw UnsupportedError("");
}

typedef NativeFinalizerFunction =
    NativeFunction<Void Function(Pointer<Void> token)>;

@Since('3.0')
abstract final class VarArgs<T extends Record> implements NativeType {}

@Since('3.5')
extension Int8ListAddress on Int8List {
  external Pointer<Int8> get address;
}

extension ArrayAddress<T extends NativeType> on Array<T> {
  external Pointer<T> get address;
}

@Since('3.5')
extension Uint8ListAddress on Uint8List {
  external Pointer<Uint8> get address;
}
'''),
]);

final MockSdkLibrary _LIB_HTML_DART2JS = MockSdkLibrary('html', [
  MockSdkLibraryUnit('html/dart2js/html_dart2js.dart', '''
library dart.dom.html;

import 'dart:async';

class Event {}

class MouseEvent extends Event {}

class FocusEvent extends Event {}

class KeyEvent extends Event {}

abstract class ElementStream<T extends Event> implements Stream<T> {}

abstract class Element {
  factory Element.html(String html,
          {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) =>
      new HtmlElement();

  /// Stream of `cut` events handled by this [Element].
  ElementStream<Event> get onCut => throw 0;

  String get id => throw 0;

  set id(String value) => throw 0;

  DocumentFragment createFragment(String html,
          {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) => null;

  void setInnerHtml(String html,
          {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {}
}

class HtmlElement extends Element {
  int tabIndex;
  ElementStream<Event> get onChange => throw 0;
  ElementStream<MouseEvent> get onClick => throw 0;
  ElementStream<KeyEvent> get onKeyUp => throw 0;
  ElementStream<KeyEvent> get onKeyDown => throw 0;

  bool get hidden => throw 0;
  set hidden(bool value) {}

  void set className(String s) {}
  void set readOnly(bool b) {}
  void set tabIndex(int i) {}

  String _innerHtml;
  String get innerHtml {
    throw 'not the real implementation';
  }

  set innerHtml(String value) {
    // stuff
  }
}

class AnchorElement extends HtmlElement {
  factory AnchorElement({String href}) {
    AnchorElement e = JS('returns:AnchorElement;creates:AnchorElement;new:true',
        '#.createElement(#)', document, "a");
    if (href != null) e.href = href;
    return e;
  }

  String href;
  String _privateField;
}

class BodyElement extends HtmlElement {
  factory BodyElement() => document.createElement("body");

  ElementStream<Event> get onUnload => throw 0;
}

class ButtonElement extends HtmlElement {
  factory ButtonElement._() {
    throw new UnsupportedError("Not supported");
  }
  factory ButtonElement() => document.createElement("button");

  bool autofocus;
}

class EmbedElement extends HtmlEment {
  String src;
}

class HeadingElement extends HtmlElement {
  factory HeadingElement._() {
    throw new UnsupportedError("Not supported");
  }
  factory HeadingElement.h1() => document.createElement("h1");
  factory HeadingElement.h2() => document.createElement("h2");
  factory HeadingElement.h3() => document.createElement("h3");
}

class ImageElement extends HtmlEment {
  String src;
}

class InputElement extends HtmlElement {
  factory InputElement._() {
    throw new UnsupportedError("Not supported");
  }
  factory InputElement() => document.createElement("input");

  String value;
  String validationMessage;
}

class IFrameElement extends HtmlElement {
  factory IFrameElement._() {
    throw new UnsupportedError("Not supported");
  }
  factory IFrameElement() => JS(
      'returns:IFrameElement;creates:IFrameElement;new:true',
      '#.createElement(#)',
      document,
      "iframe");

  String src;
  set srcdoc(String? value) native;
}

class OptionElement extends HtmlElement {
  factory OptionElement(
      {String data: '', String value: '', bool selected: false}) {}

  factory OptionElement._(
      [String data, String value, bool defaultSelected, bool selected]) {}
}

class ScriptElement extends HtmlElement {
  String src;
  String type;
}

class TableSectionElement extends HtmlElement {
  List<TableRowElement> get rows => throw 0;

  TableRowElement addRow() {}

  TableRowElement insertRow(int index) => throw 0;

  factory TableSectionElement._() {
    throw new UnsupportedError("Not supported");
  }

  @Deprecated("Internal Use Only")
  external static Type get instanceRuntimeType;

  @Deprecated("Internal Use Only")
  TableSectionElement.internal_() : super.internal_();
}

class TemplateElement extends HtmlElement {
  factory TemplateElement._() {
    throw new UnsupportedError("Not supported");
  }
  factory TemplateElement() => document.createElement("template");
}

class AudioElement extends MediaElement {
  factory AudioElement._([String src]) {
    if (src != null) {
      return AudioElement._create_1(src);
    }
    return AudioElement._create_2();
  }

  static AudioElement _create_1(src) => JS('AudioElement', 'new Audio(#)', src);
  static AudioElement _create_2() => JS('AudioElement', 'new Audio()');
  AudioElement.created() : super.created();

  factory AudioElement([String src]) => new AudioElement._(src);
}

class MediaElement extends Element {}

class WindowBase {}

class Window extends WindowBase {
  WindowBase open(String url, String name, [String options]) => null;
}

class NodeValidator {}

class NodeTreeSanitizer {}

class DocumentFragment {
  DocumentFragment.html(String html,
          {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {}
}

dynamic JS(a, b, c, d) {}

class File {}
'''),
]);

final MockSdkLibrary _LIB_INTERCEPTORS = MockSdkLibrary('_interceptors', [
  MockSdkLibraryUnit('_internal/js_runtime/lib/interceptors.dart', '''
library dart._interceptors;
'''),
]);

final MockSdkLibrary _LIB_INTERNAL = MockSdkLibrary('_internal', [
  MockSdkLibraryUnit('_internal/internal.dart', '''
library dart._internal;

import 'dart:core' hide Symbol;
import 'dart:core' as core show Symbol;

class EmptyIterable<E> implements Iterable<E> {
  const EmptyIterable();
}

class ExternalName {
  final String name;
  const ExternalName(this.name);
}

@Since("2.2")
class Since {
  final String version;
  const Since(this.version);
}

class Symbol implements core.Symbol {
  external const Symbol(String name);
}
'''),
], categories: '');

final MockSdkLibrary _LIB_IO = MockSdkLibrary('io', [
  MockSdkLibraryUnit('io/io.dart', '''
library dart.io;

import 'dart:convert';

Never exit(int code) => throw code;

int get exitCode => 0;

void set exitCode(int code) {}

abstract class Directory implements FileSystemEntity {
  factory Directory(String path) {
    throw 0;
  }
}

abstract class File implements FileSystemEntity {
  factory File(String path) {
    throw 0;
  }

  Future<DateTime> lastModified();
  DateTime lastModifiedSync();
  IOSink openWrite();
}

abstract class FileSystemEntity {
  static Future<bool> isDirectory(String path) async => true;
  static bool isDirectorySync(String path) => true;

  static Future<bool> isFile(String path) async => true;
  static bool isFileSync(String path) => true;

  static Future<bool> isLink(String path) async => true;
  static bool isLinkSync(String path) => true;

  static Future<FileSystemEntityType> type(String path,
          {bool followLinks: true}) =>
      throw 0;
  static FileSystemEntityType typeSync(String path,
          {bool followLinks = true}) =>
      throw 0;

  Future<bool> exists();
  bool existsSync();

  Future<FileStat> stat();
  FileStat statSync();
}

class IOSink implements Sink<List<int>> {
  Future<dynamic> close() {}
  void write(Object? object) {}
}

class Platform {
  @deprecated
  static final bool isAndroid = (operatingSystem == "android");

  @deprecated
  static final String localHostname = 'hostname';
}

class ProcessStartMode {
  static const normal = const ProcessStartMode._internal(0);
  const ProcessStartMode._internal(int mode);
}

abstract class Process {
  external static Future<Process> start(
    String executable,
    List<String> arguments, {
    String? workingDirectory,
    Map<String, String>? environment,
    bool includeParentEnvironment: true,
    bool runInShell: false,
    ProcessStartMode mode: ProcessStartMode.normal,
  });

  external static Future<ProcessResult> run(
    String executable,
    List<String> arguments, {
    String? workingDirectory,
    Map<String, String>? environment,
    bool includeParentEnvironment: true,
    bool runInShell: false,
    Encoding? stdoutEncoding,
    Encoding? stderrEncoding,
  });
}

abstract class Socket {
  void destroy() {}

  static Future<Socket> connect(dynamic host, int port) async => Socket();
}
'''),
]);

final MockSdkLibrary _LIB_ISOLATE = MockSdkLibrary('isolate', [
  MockSdkLibraryUnit('isolate/isolate.dart', '''
library dart.isolate;

abstract class SendPort {}

class Isolate {
  external static Future<Isolate> spawnUri(
    Uri uri,
    List<String> args,
    var message, {
    bool paused = false,
    SendPort? onExit,
    SendPort? onError,
    bool errorsAreFatal = true,
    bool? checked,
    Map<String, String>? environment,
    Uri? packageConfig,
    bool automaticPackageResolution = false,
    String? debugName,
  });
}
'''),
]);

final MockSdkLibrary _LIB_JS = MockSdkLibrary('js', [
  MockSdkLibraryUnit('js/js.dart', '''
library dart.js;

class JsObject {}
'''),
]);

final MockSdkLibrary _LIB_JS_ANNOTATIONS = MockSdkLibrary('_js_annotations', [
  MockSdkLibraryUnit('js/_js_annotations.dart', '''
library _js_annotations;

class JS {
  final String? name;
  const JS([this.name]);
}

class _StaticInterop {
  const _StaticInterop();
}

const _StaticInterop staticInterop = _StaticInterop();
'''),
]);

final MockSdkLibrary _LIB_JS_INTEROP = MockSdkLibrary('js_interop', [
  MockSdkLibraryUnit('js/js_interop.dart', '''
library;

import 'dart:typed_data';

export 'dart:_js_annotations' show staticInterop;

class JS {
  final String? name;
  const JS([this.name]);
}

extension type JSAny._(Object _) implements Object {}

extension type JSBoolean._(bool _) implements JSAny {}

extension type JSString._(String _) implements JSAny {}

extension type JSNumber._(num _) implements JSAny {}

extension type JSObject._(Object _) implements JSAny {}

extension type JSArray<T extends JSAny?>._(List _) implements JSObject {}

extension type JSTypedArray._(TypedData _) implements JSObject {}

extension type JSUint8List._(Uint8List _) implements JSTypedArray {}

extension JSAnyUtilityExtension on JSAny? {
  external bool typeofEquals(String typeString);

  external bool instanceof(JSFunction constructor);

  bool instanceOfString(String constructorName) => false;

  @Since('3.4')
  external bool isA<T extends JSAny?>();

  external Object? dartify();
}

extension NullableObjectUtilExtension on Object? {
  external JSAny? jsify();
}
'''),
]);

final MockSdkLibrary _LIB_MATH = MockSdkLibrary('math', [
  MockSdkLibraryUnit('math/math.dart', '''
library dart.math;

const double e = 2.718281828459045;
const double pi = 3.1415926535897932;
const double ln10 = 2.302585092994046;

T min<T extends num>(T a, T b) => throw 0;
T max<T extends num>(T a, T b) => throw 0;

external double cos(num radians);
external double sin(num radians);
external double sqrt(num radians);
external double tan(num radians);

class Random {
  bool nextBool() => true;
  double nextDouble() => 2.0;
  int nextInt() => 1;
}

class Point<T extends num> {}
'''),
]);

final MockSdkLibrary _LIB_TYPED_DATA = MockSdkLibrary('typed_data', [
  MockSdkLibraryUnit('typed_data/typed_data.dart', '''
library dart.typed_data;

abstract final class Uint8List {
  external factory Uint8List(int length);
}

abstract final class Int8List {
  external factory Int8List(int length);
}

abstract final class Float32List {
  external factory Float32List(int length);
}

abstract final class Float64List {
  external factory Float64List(int length);
}
'''),
]);

final MockSdkLibrary _LIB_WASM = MockSdkLibrary('_wasm', [
  MockSdkLibraryUnit('_wasm/wasm.dart', ''),
]);

final List<MockSdkLibrary> _LIBRARIES = [
  _LIB_ASYNC,
  _LIB_ASYNC2,
  _LIB_COLLECTION,
  _LIB_CONVERT,
  _LIB_CORE,
  _LIB_FFI,
  _LIB_HTML_DART2JS,
  _LIB_INTERCEPTORS,
  _LIB_INTERNAL,
  _LIB_IO,
  _LIB_ISOLATE,
  _LIB_JS,
  _LIB_JS_ANNOTATIONS,
  _LIB_JS_INTEROP,
  _LIB_MATH,
  _LIB_TYPED_DATA,
  _LIB_WASM,
];

/// Creates a reduced approximation of Dart SDK in the [root].
///
/// It has enough libraries to run analyzer and analysis server tests,
/// but some libraries, classes, and methods are missing.
void createMockSdk({
  required ResourceProvider resourceProvider,
  required Folder root,
  @internal List<MockSdkLibrary> additionalLibraries = const [],
}) {
  var lib = root.getChildAssumingFolder('lib');
  var libInternal = lib.getChildAssumingFolder('_internal');

  var currentVersion = ExperimentStatus.currentVersion;
  var currentVersionStr = '${currentVersion.major}.${currentVersion.minor}.0';
  root.getChildAssumingFile('version').writeAsStringSync(currentVersionStr);

  var librariesBuffer = StringBuffer();
  librariesBuffer.writeln('const Map<String, LibraryInfo> libraries = const {');

  for (var library in [..._LIBRARIES, ...additionalLibraries]) {
    for (var unit in library.units) {
      var file = lib.getChildAssumingFile(unit.path);
      file.writeAsStringSync(unit.content);
    }
    librariesBuffer.writeln(
      '  "${library.name}": const LibraryInfo("${library.path}", '
      'categories: "${library.categories}"),',
    );
  }

  librariesBuffer.writeln('};');
  libInternal
      .getChildAssumingFile('sdk_library_metadata/lib/libraries.dart')
      .writeAsStringSync('$librariesBuffer');

  libInternal
      .getChildAssumingFile('allowed_experiments.json')
      .writeAsStringSync(
        json.encode({
          'version': 1,
          'experimentSets': {
            'sdkExperiments': <String>['class-modifiers', 'sealed-class'],
          },
          'sdk': {
            'default': {'experimentSet': 'sdkExperiments'},
          },
          'packages': <String, Object>{},
        }),
      );
}

class MockSdkLibrary implements SdkLibrary {
  final String name;
  final String categories;
  final List<MockSdkLibraryUnit> units;

  MockSdkLibrary(this.name, this.units, {this.categories = 'Shared'});

  @override
  String get category => throw UnimplementedError();

  @override
  bool get isDart2JsLibrary => throw UnimplementedError();

  @override
  bool get isDocumented => throw UnimplementedError();

  @override
  bool get isImplementation => throw UnimplementedError();

  @override
  bool get isInternal => shortName.startsWith('dart:_');

  @override
  bool get isShared => throw UnimplementedError();

  @override
  bool get isVmLibrary => throw UnimplementedError();

  @override
  String get path => units[0].path;

  @override
  String get shortName => 'dart:$name';
}

class MockSdkLibraryUnit {
  final String path;
  final String content;

  MockSdkLibraryUnit(this.path, this.content);
}