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packages/smoke/test/codegen/testing_resolver_utils.dart

+// Copyright (c) 2014, 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.
+
+/// Utility functions to test the code generation tools with the resolver.
+// Note, this is just for simple tests, so we restricted the logic to only
+// support root-relative imports. For more sophisticated stuff, you should be
+// using the test helpers in `package:code_transformers`.
+library smoke.test.codegen.testing_resolver_utils;
+
+import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/java_io.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/sdk_io.dart' show DirectoryBasedDartSdk;
+import 'package:code_transformers/tests.dart' show testingDartSdkDirectory;
+
+class LibraryProvider {
+  final AnalysisContext _analyzer;
+  final Map<String, Source> _allSources;
+  LibraryProvider(this._analyzer, this._allSources);
+  LibraryElement libraryFor(String uri) =>
+      _analyzer.computeLibraryElement(_allSources[uri]);
+}
+
+LibraryProvider initAnalyzer(Map<String, String> contents) {
+  var analyzer = AnalysisEngine.instance.createAnalysisContext();
+  var options = new AnalysisOptionsImpl()
+    ..cacheSize = 256
+    ..preserveComments = false
+    ..analyzeFunctionBodies = false;
+  analyzer.analysisOptions = options;
+  var sdk = new DirectoryBasedDartSdk(new JavaFile(testingDartSdkDirectory));
+  sdk.context.analysisOptions = options;
+  var changes = new ChangeSet();
+  var allSources = {};
+  contents.forEach((url, code) {
+    var source = new _SimpleSource(url, code, allSources);
+    allSources[url] = source;
+    changes.addedSource(source);
+  });
+  analyzer.applyChanges(changes);
+
+  analyzer.sourceFactory = new SourceFactory(
+      [new DartUriResolver(sdk), new _SimpleUriResolver(allSources)]);
+
+  return new LibraryProvider(analyzer, allSources);
+}
+
+class _SimpleUriResolver implements UriResolver {
+  final Map<String, Source> allSources;
+  _SimpleUriResolver(this.allSources);
+
+  Source resolveAbsolute(Uri uri, [Uri actualUri]) => allSources['$uri'];
+
+  Source fromEncoding(UriKind kind, Uri uri) =>
+      throw new UnimplementedError('fromEncoding not implemented');
+
+  Uri restoreAbsolute(Source source) =>
+      throw new UnimplementedError('restoreAbsolute not implemented');
+}
+
+class _SimpleSource extends Source {
+  final Uri uri;
+  final String path;
+  final String rawContents;
+  final Map<String, Source> allSources;
+
+  _SimpleSource(this.path, this.rawContents, this.allSources)
+      : uri = Uri.parse('file:///path');
+
+  operator ==(other) =>
+      other is _SimpleSource && rawContents == other.rawContents;
+  int get hashCode => rawContents.hashCode;
+
+  bool exists() => true;
+  String get encoding => '$uriKind/$path';
+  String get fullName => path;
+  TimestampedData<String> get contents =>
+      new TimestampedData<String>(modificationStamp, rawContents);
+
+  int get modificationStamp => 1;
+  String get shortName => path;
+  UriKind get uriKind => UriKind.FILE_URI;
+  final bool isInSystemLibrary = false;
+
+  // Since this is just for simple tests we just restricted this mock
+  // to root-relative imports. For more sophisticated stuff, you should be
+  // using the test helpers in `package:code_transformers`.
+  Source resolveRelative(Uri uri) {
+    if (uri.path.startsWith('/')) return allSources['${uri.path}'];
+    throw new UnimplementedError('relative URIs not supported: $uri');
+  }
+
+  // Since this is just for simple tests we just restricted this mock
+  // to root-relative imports. For more sophisticated stuff, you should be
+  // using the test helpers in `package:code_transformers`.
+  Uri resolveRelativeUri(Uri uri) {
+    if (!uri.path.startsWith('/')) {
+      throw new UnimplementedError('relative URIs not supported: $uri');
+    }
+    return uri;
+  }
+
+  void getContentsToReceiver(Source_ContentReceiver receiver) {
+    receiver.accept(rawContents, modificationStamp);
+  }
+}