Move ChangeBuilder to analyzer_plugin

pkg/analyzer_plugin/test/support/mock_sdk.dart

+// Copyright (c) 2017, 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 'package:analyzer/file_system/file_system.dart' as resource;
+import 'package:analyzer/file_system/memory_file_system.dart' as resource;
+import 'package:analyzer/src/context/context.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/idl.dart' show PackageBundle;
+import 'package:analyzer/src/summary/summary_file_builder.dart';
+
+/**
+ * A utility class that will create a Mock SDK on the virtual disk managed by a
+ * memory resource provider.
+ */
+class MockSdk implements DartSdk {
+  static const MockSdkLibrary LIB_CORE = const MockSdkLibrary(
+      'dart:core',
+      '/lib/core/core.dart',
+      '''
+library dart.core;
+
+import 'dart:async';
+import 'dart:_internal';
+
+class Object {
+  const Object() {}
+  bool operator ==(other) => identical(this, other);
+  String toString() => 'a string';
+  int get hashCode => 0;
+  Type get runtimeType => null;
+  dynamic noSuchMethod(Invocation invocation) => null;
+}
+
+class Function {}
+class StackTrace {}
+class Symbol {}
+class Type {}
+
+abstract class Comparable<T> {
+  int compareTo(T other);
+}
+
+abstract class String implements Comparable<String> {
+  external factory String.fromCharCodes(Iterable<int> charCodes,
+                                        [int start = 0, int end]);
+  bool get isEmpty => false;
+  bool get isNotEmpty => false;
+  int get length => 0;
+  String toUpperCase();
+  List<int> get codeUnits;
+}
+
+class bool extends Object {}
+
+abstract class num implements Comparable<num> {
+  bool operator <(num other);
+  bool operator <=(num other);
+  bool operator >(num other);
+  bool operator >=(num other);
+  num operator +(num other);
+  num operator -(num other);
+  num operator *(num other);
+  num operator /(num other);
+  int operator ^(int other);
+  int operator &(int other);
+  int operator |(int other);
+  int operator <<(int other);
+  int operator >>(int other);
+  int operator ~/(num other);
+  num operator %(num other);
+  int operator ~();
+  int toInt();
+  double toDouble();
+  num abs();
+  int round();
+}
+
+abstract class int extends num {
+  bool get isEven => false;
+  int operator -();
+  external static int parse(String source,
+                            { int radix,
+                              int onError(String source) });
+}
+
+abstract class double extends num {
+  static const double NAN = 0.0 / 0.0;
+  static const double INFINITY = 1.0 / 0.0;
+  static const double NEGATIVE_INFINITY = -INFINITY;
+  static const double MIN_POSITIVE = 5e-324;
+  static const double MAX_FINITE = 1.7976931348623157e+308;
+
+  double remainder(num other);
+  double operator +(num other);
+  double operator -(num other);
+  double operator *(num other);
+  double operator %(num other);
+  double operator /(num other);
+  int operator ~/(num other);
+  double operator -();
+  double abs();
+  double get sign;
+  int round();
+  int floor();
+  int ceil();
+  int truncate();
+  double roundToDouble();
+  double floorToDouble();
+  double ceilToDouble();
+  double truncateToDouble();
+  external static double parse(String source,
+                               [double onError(String source)]);
+}
+
+class DateTime extends Object {}
+class Null extends Object {}
+
+class Deprecated extends Object {
+  final String expires;
+  const Deprecated(this.expires);
+}
+const Object deprecated = const Deprecated("next release");
+
+class Iterator<E> {
+  bool moveNext();
+  E get current;
+}
+
+abstract class Iterable<E> {
+  Iterator<E> get iterator;
+  bool get isEmpty;
+  Iterable/*<R>*/ map/*<R>*/(/*=R*/ f(E e));
+}
+
+class List<E> implements Iterable<E> {
+  List();
+  void add(E value) {}
+  void addAll(Iterable<E> iterable) {}
+  E operator [](int index) => null;
+  void operator []=(int index, E value) {}
+  Iterator<E> get iterator => null;
+  void clear() {}
+
+  bool get isEmpty => false;
+  E get first => null;
+  E get last => null;
+
+  Iterable/*<R>*/ map/*<R>*/(/*=R*/ f(E e)) => null;
+
+  /*=R*/ fold/*<R>*/(/*=R*/ initialValue,
+      /*=R*/ combine(/*=R*/ previousValue, E element)) => null;
+
+}
+
+abstract class Map<K, V> extends Object {
+  bool containsKey(Object key);
+  Iterable<K> get keys;
+}
+
+external bool identical(Object a, Object b);
+
+void print(Object object) {}
+
+class Uri {
+  static List<int> parseIPv6Address(String host, [int start = 0, int end]) {
+    int parseHex(int start, int end) {
+      return 0;
+    }
+    return null;
+  }
+}
+''');
+
+  static const MockSdkLibrary LIB_ASYNC = const MockSdkLibrary(
+      'dart:async',
+      '/lib/async/async.dart',
+      '''
+library dart.async;
+
+import 'dart:math';
+
+class Future<T> {
+  factory Future(computation()) => null;
+  factory Future.delayed(Duration duration, [T computation()]) => null;
+  factory Future.value([value]) => null;
+  static Future wait(List<Future> futures) => null;
+}
+
+class FutureOr<T> {}
+
+class Stream<T> {}
+abstract class StreamTransformer<S, T> {}
+''');
+
+  static const MockSdkLibrary LIB_COLLECTION = const MockSdkLibrary(
+      'dart:collection',
+      '/lib/collection/collection.dart',
+      '''
+library dart.collection;
+
+abstract class HashMap<K, V> implements Map<K, V> {}
+abstract class LinkedHashMap<K, V> implements Map<K, V> {}
+''');
+
+  static const MockSdkLibrary LIB_CONVERT = const MockSdkLibrary(
+      'dart:convert',
+      '/lib/convert/convert.dart',
+      '''
+library dart.convert;
+
+import 'dart:async';
+
+abstract class Converter<S, T> implements StreamTransformer {}
+class JsonDecoder extends Converter<String, Object> {}
+''');
+
+  static const MockSdkLibrary LIB_MATH = const MockSdkLibrary(
+      'dart:math',
+      '/lib/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) => null;
+T max<T extends num>(T a, T b) => null;
+external double cos(num radians);
+external num pow(num x, num exponent);
+external double sin(num radians);
+external double sqrt(num x);
+class Random {
+  bool nextBool() => true;
+  double nextDouble() => 2.0;
+  int nextInt() => 1;
+}
+''');
+
+  static const MockSdkLibrary LIB_HTML = const MockSdkLibrary(
+      'dart:html',
+      '/lib/html/dartium/html_dartium.dart',
+      '''
+library dart.html;
+class HtmlElement {}
+''');
+
+  static const MockSdkLibrary LIB_INTERNAL = const MockSdkLibrary(
+      'dart:_internal',
+      '/lib/internal/internal.dart',
+      '''
+library dart._internal;
+external void printToConsole(String line);
+''');
+
+  static const List<SdkLibrary> LIBRARIES = const [
+    LIB_CORE,
+    LIB_ASYNC,
+    LIB_COLLECTION,
+    LIB_CONVERT,
+    LIB_MATH,
+    LIB_HTML,
+    LIB_INTERNAL,
+  ];
+
+  static const String librariesContent = r'''
+const Map<String, LibraryInfo> libraries = const {
+  "async": const LibraryInfo("async/async.dart"),
+  "collection": const LibraryInfo("collection/collection.dart"),
+  "convert": const LibraryInfo("convert/convert.dart"),
+  "core": const LibraryInfo("core/core.dart"),
+  "html": const LibraryInfo("html/dartium/html_dartium.dart"),
+  "math": const LibraryInfo("math/math.dart"),
+  "_internal": const LibraryInfo("internal/internal.dart"),
+};
+''';
+
+  final resource.MemoryResourceProvider provider;
+
+  /**
+   * The [AnalysisContext] which is used for all of the sources.
+   */
+  InternalAnalysisContext _analysisContext;
+
+  /**
+   * The cached linked bundle of the SDK.
+   */
+  PackageBundle _bundle;
+
+  MockSdk(
+      {bool generateSummaryFiles: false,
+      resource.ResourceProvider resourceProvider})
+      : provider = resourceProvider ?? new resource.MemoryResourceProvider() {
+    LIBRARIES.forEach((SdkLibrary library) {
+      provider.newFile(library.path, (library as MockSdkLibrary).content);
+    });
+    provider.newFile(
+        provider.convertPath(
+            '/lib/_internal/sdk_library_metadata/lib/libraries.dart'),
+        librariesContent);
+    if (generateSummaryFiles) {
+      List<int> bytes = _computeLinkedBundleBytes();
+      provider.newFileWithBytes(
+          provider.convertPath('/lib/_internal/spec.sum'), bytes);
+      provider.newFileWithBytes(
+          provider.convertPath('/lib/_internal/strong.sum'), bytes);
+    }
+  }
+
+  @override
+  AnalysisContext get context {
+    if (_analysisContext == null) {
+      _analysisContext = new SdkAnalysisContext(null);
+      SourceFactory factory = new SourceFactory([new DartUriResolver(this)]);
+      _analysisContext.sourceFactory = factory;
+    }
+    return _analysisContext;
+  }
+
+  @override
+  List<SdkLibrary> get sdkLibraries => LIBRARIES;
+
+  @override
+  String get sdkVersion => throw unimplemented;
+
+  UnimplementedError get unimplemented => new UnimplementedError();
+
+  @override
+  List<String> get uris {
+    List<String> uris = <String>[];
+    for (SdkLibrary library in LIBRARIES) {
+      uris.add(library.shortName);
+    }
+    return uris;
+  }
+
+  @override
+  Source fromFileUri(Uri uri) {
+    String filePath = provider.pathContext.fromUri(uri);
+    for (SdkLibrary library in sdkLibraries) {
+      String libraryPath = provider.convertPath(library.path);
+      if (filePath == libraryPath) {
+        try {
+          resource.File file = provider.getResource(filePath);
+          Uri dartUri = Uri.parse(library.shortName);
+          return file.createSource(dartUri);
+        } catch (exception) {
+          return null;
+        }
+      }
+      String libraryRootPath = provider.pathContext.dirname(libraryPath) +
+          provider.pathContext.separator;
+      if (filePath.startsWith(libraryRootPath)) {
+        String pathInLibrary = filePath.substring(libraryRootPath.length);
+        String uriStr = '${library.shortName}/$pathInLibrary';
+        try {
+          resource.File file = provider.getResource(filePath);
+          Uri dartUri = Uri.parse(uriStr);
+          return file.createSource(dartUri);
+        } catch (exception) {
+          return null;
+        }
+      }
+    }
+    return null;
+  }
+
+  @override
+  PackageBundle getLinkedBundle() {
+    if (_bundle == null) {
+      resource.File summaryFile =
+          provider.getFile(provider.convertPath('/lib/_internal/spec.sum'));
+      List<int> bytes;
+      if (summaryFile.exists) {
+        bytes = summaryFile.readAsBytesSync();
+      } else {
+        bytes = _computeLinkedBundleBytes();
+      }
+      _bundle = new PackageBundle.fromBuffer(bytes);
+    }
+    return _bundle;
+  }
+
+  @override
+  SdkLibrary getSdkLibrary(String dartUri) {
+    // getSdkLibrary() is only used to determine whether a library is internal
+    // to the SDK.  The mock SDK doesn't have any internals, so it's safe to
+    // return null.
+    return null;
+  }
+
+  @override
+  Source mapDartUri(String dartUri) {
+    const Map<String, String> uriToPath = const {
+      "dart:core": "/lib/core/core.dart",
+      "dart:html": "/lib/html/dartium/html_dartium.dart",
+      "dart:async": "/lib/async/async.dart",
+      "dart:collection": "/lib/collection/collection.dart",
+      "dart:convert": "/lib/convert/convert.dart",
+      "dart:math": "/lib/math/math.dart",
+      "dart:_internal": "/lib/internal/internal.dart",
+    };
+
+    String path = uriToPath[dartUri];
+    if (path != null) {
+      resource.File file = provider.getResource(path);
+      Uri uri = new Uri(scheme: 'dart', path: dartUri.substring(5));
+      return file.createSource(uri);
+    }
+
+    // If we reach here then we tried to use a dartUri that's not in the
+    // table above.
+    return null;
+  }
+
+  /**
+   * Compute the bytes of the linked bundle associated with this SDK.
+   */
+  List<int> _computeLinkedBundleBytes() {
+    List<Source> librarySources = sdkLibraries
+        .map((SdkLibrary library) => mapDartUri(library.shortName))
+        .toList();
+    return new SummaryBuilder(
+            librarySources, context, context.analysisOptions.strongMode)
+        .build();
+  }
+}
+
+class MockSdkLibrary implements SdkLibrary {
+  @override
+  final String shortName;
+
+  @override
+  final String path;
+
+  final String content;
+
+  const MockSdkLibrary(this.shortName, this.path, this.content);
+
+  @override
+  String get category => throw unimplemented;
+
+  @override
+  bool get isDart2JsLibrary => throw unimplemented;
+
+  @override
+  bool get isDocumented => throw unimplemented;
+
+  @override
+  bool get isImplementation => false;
+
+  @override
+  bool get isInternal => shortName.startsWith('dart:_');
+
+  @override
+  bool get isShared => throw unimplemented;
+
+  @override
+  bool get isVmLibrary => throw unimplemented;
+
+  UnimplementedError get unimplemented => new UnimplementedError();
+}