Remove the checker and corresponding dead code

test/testing.dart

 // Copyright (c) 2015, 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.
 
 library dev_compiler.src.testing;
 
 import 'dart:mirrors';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, AnalysisEngine, AnalysisOptionsImpl;
-import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:cli_util/cli_util.dart' show getSdkDir;
-import 'package:logging/logging.dart';
 import 'package:path/path.dart' as path;
-import 'package:source_span/source_span.dart';
-import 'package:test/test.dart';
 
-import 'package:dev_compiler/strong_mode.dart';
 import 'package:dev_compiler/src/analysis_context.dart';
 
 import 'package:dev_compiler/src/server/dependency_graph.dart'
     show runtimeFilesForServerMode;
-import 'package:dev_compiler/src/info.dart';
 import 'package:dev_compiler/src/options.dart';
-import 'package:dev_compiler/src/utils.dart';
 
 /// Shared analysis context used for compilation.
 final AnalysisContext realSdkContext = () {
-  var context = createAnalysisContextWithSources(
-      new StrongModeOptions(),
-      new SourceResolverOptions(
-          dartSdkPath: getSdkDir().path,
-          customUrlMappings: {
-            'package:expect/expect.dart': _testCodegenPath('expect.dart'),
-            'package:async_helper/async_helper.dart':
-                _testCodegenPath('async_helper.dart'),
-            'package:unittest/unittest.dart': _testCodegenPath('unittest.dart'),
-            'package:dom/dom.dart': _testCodegenPath('sunflower', 'dom.dart')
-          }));
+  var context = createAnalysisContextWithSources(new SourceResolverOptions(
+      dartSdkPath: getSdkDir().path,
+      customUrlMappings: {
+        'package:expect/expect.dart': _testCodegenPath('expect.dart'),
+        'package:async_helper/async_helper.dart':
+            _testCodegenPath('async_helper.dart'),
+        'package:unittest/unittest.dart': _testCodegenPath('unittest.dart'),
+        'package:dom/dom.dart': _testCodegenPath('sunflower', 'dom.dart')
+      }));
   (context.analysisOptions as AnalysisOptionsImpl).cacheSize = 512;
   return context;
 }();
 
 String _testCodegenPath(String p1, [String p2]) =>
     path.join(testDirectory, 'codegen', p1, p2);
 
 final String testDirectory =
     path.dirname((reflectClass(_TestUtils).owner as LibraryMirror).uri.path);
 
 class _TestUtils {}
 
-/// Run the checker on a program with files contents as indicated in
-/// [testFiles].
-///
-/// This function makes several assumptions to make it easier to describe error
-/// expectations:
-///
-///   * a file named `/main.dart` exists in [testFiles].
-///   * all expected failures are listed in the source code using comments
-///   immediately in front of the AST node that should contain the error.
-///   * errors are formatted as a token `level:Type`, where `level` is the
-///   logging level were the error would be reported at, and `Type` is the
-///   concrete subclass of [StaticInfo] that denotes the error.
-///
-/// For example, to check that an assignment produces a warning about a boxing
-/// conversion, you can describe the test as follows:
-///
-///     testChecker({
-///       '/main.dart': '''
-///           testMethod() {
-///             dynamic x = /*warning:Box*/3;
-///           }
-///       '''
-///     });
-///
-void testChecker(String name, Map<String, String> testFiles,
-    {String sdkDir, customUrlMappings: const {}}) {
-  test(name, () {
-    expect(testFiles.containsKey('/main.dart'), isTrue,
-        reason: '`/main.dart` is missing in testFiles');
-
-    var provider = createTestResourceProvider(testFiles);
-    var uriResolver = new TestUriResolver(provider);
-    // Enable task model strong mode
-    AnalysisEngine.instance.useTaskModel = true;
-    var context = AnalysisEngine.instance.createAnalysisContext();
-    context.analysisOptions.strongMode = true;
-    context.sourceFactory = createSourceFactory(
-        new SourceResolverOptions(
-            customUrlMappings: customUrlMappings,
-            useMockSdk: sdkDir == null,
-            dartSdkPath: sdkDir),
-        fileResolvers: [uriResolver]);
-
-    var checker =
-        new StrongChecker(context, new StrongModeOptions(hints: true));
-
-    // Run the checker on /main.dart.
-    var mainSource = uriResolver.resolveAbsolute(new Uri.file('/main.dart'));
-    var initialLibrary =
-        context.resolveCompilationUnit2(mainSource, mainSource);
-
-    // Extract expectations from the comments in the test files, and
-    // check that all errors we emit are included in the expected map.
-    var allLibraries = reachableLibraries(initialLibrary.element.library);
-    for (var lib in allLibraries) {
-      for (var unit in lib.units) {
-        if (unit.source.uri.scheme == 'dart') continue;
-
-        var errorInfo = checker.computeErrors(unit.source);
-        new _ExpectedErrorVisitor(errorInfo.errors).validate(unit.unit);
-      }
-    }
-  });
-}
-
 /// Creates a [MemoryResourceProvider] with test data
 MemoryResourceProvider createTestResourceProvider(
     Map<String, String> testFiles) {
   var provider = new MemoryResourceProvider();
   runtimeFilesForServerMode.forEach((filepath) {
     testFiles['/dev_compiler_runtime/$filepath'] =
         '/* test contents of $filepath */';
   });
   testFiles.forEach((key, value) {
     var scheme = 'package:';
@@ skipping 13 matching lines @@
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     if (uri.scheme == 'package') {
       return (provider.getResource('/packages/' + uri.path) as File)
           .createSource(uri);
     }
     return super.resolveAbsolute(uri, actualUri);
   }
 }
-
-class _ExpectedErrorVisitor extends UnifyingAstVisitor {
-  final Set<AnalysisError> _actualErrors;
-  CompilationUnit _unit;
-  String _unitSourceCode;
-
-  _ExpectedErrorVisitor(List<AnalysisError> actualErrors)
-      : _actualErrors = new Set.from(actualErrors);
-
-  validate(CompilationUnit unit) {
-    _unit = unit;
-    // This reads the file. Only safe because tests use MemoryFileSystem.
-    _unitSourceCode = unit.element.source.contents.data;
-
-    // Visit the compilation unit.
-    unit.accept(this);
-
-    if (_actualErrors.isNotEmpty) {
-      var actualMsgs = _actualErrors.map(_formatActualError).join('\n');
-      fail('Unexpected errors reported by checker:\n\n$actualMsgs');
-    }
-  }
-
-  visitNode(AstNode node) {
-    var token = node.beginToken;
-    var comment = token.precedingComments;
-    // Use error marker found in an immediately preceding comment,
-    // and attach it to the outermost expression that starts at that token.
-    if (comment != null) {
-      while (comment.next != null) {
-        comment = comment.next;
-      }
-      if (comment.end == token.offset && node.parent.beginToken != token) {
-        var commentText = '$comment';
-        var start = commentText.lastIndexOf('/*');
-        var end = commentText.lastIndexOf('*/');
-        if (start != -1 && end != -1) {
-          expect(start, lessThan(end));
-          var errors = commentText.substring(start + 2, end).split(',');
-          var expectations =
-              errors.map(_ErrorExpectation.parse).where((x) => x != null);
-
-          for (var e in expectations) _expectError(node, e);
-        }
-      }
-    }
-    return super.visitNode(node);
-  }
-
-  void _expectError(AstNode node, _ErrorExpectation expected) {
-    // See if we can find the expected error in our actual errors
-    for (var actual in _actualErrors) {
-      if (actual.offset == node.offset && actual.length == node.length) {
-        var actualMsg = _formatActualError(actual);
-        expect(_actualErrorLevel(actual), expected.level,
-            reason: 'expected different error code at:\n\n$actualMsg');
-        expect(errorCodeName(actual.errorCode), expected.typeName,
-            reason: 'expected different error type at:\n\n$actualMsg');
-
-        // We found it. Stop the search.
-        _actualErrors.remove(actual);
-        return;
-      }
-    }
-
-    var span = _createSpan(node.offset, node.length);
-    var levelName = expected.level.name.toLowerCase();
-    var msg = span.message(expected.typeName, color: colorOf(levelName));
-    fail('expected error was not reported at:\n\n$levelName: $msg');
-  }
-
-  Level _actualErrorLevel(AnalysisError actual) {
-    return const <ErrorSeverity, Level>{
-      ErrorSeverity.ERROR: Level.SEVERE,
-      ErrorSeverity.WARNING: Level.WARNING,
-      ErrorSeverity.INFO: Level.INFO
-    }[actual.errorCode.errorSeverity];
-  }
-
-  String _formatActualError(AnalysisError actual) {
-    var span = _createSpan(actual.offset, actual.length);
-    var levelName = _actualErrorLevel(actual).name.toLowerCase();
-    var msg = span.message(actual.message, color: colorOf(levelName));
-    return '$levelName: [${errorCodeName(actual.errorCode)}] $msg';
-  }
-
-  SourceSpan _createSpan(int offset, int len) {
-    return createSpanHelper(_unit.lineInfo, offset, offset + len,
-        _unit.element.source, _unitSourceCode);
-  }
-}
-
-/// Describes an expected message that should be produced by the checker.
-class _ErrorExpectation {
-  final Level level;
-  final String typeName;
-  _ErrorExpectation(this.level, this.typeName);
-
-  static _ErrorExpectation _parse(String descriptor) {
-    var tokens = descriptor.split(':');
-    expect(tokens.length, 2, reason: 'invalid error descriptor');
-    var name = tokens[0].toUpperCase();
-    var typeName = tokens[1];
-
-    var level =
-        Level.LEVELS.firstWhere((l) => l.name == name, orElse: () => null);
-    expect(level, isNotNull,
-        reason: 'invalid level in error descriptor: `${tokens[0]}`');
-    expect(typeName, isNotNull,
-        reason: 'invalid type in error descriptor: ${tokens[1]}');
-    return new _ErrorExpectation(level, typeName);
-  }
-
-  static _ErrorExpectation parse(String descriptor) {
-    descriptor = descriptor.trim();
-    var tokens = descriptor.split(' ');
-    if (tokens.length == 1) return _parse(tokens[0]);
-    expect(tokens.length, 4, reason: 'invalid error descriptor');
-    expect(tokens[1], "should", reason: 'invalid error descriptor');
-    expect(tokens[2], "be", reason: 'invalid error descriptor');
-    if (tokens[0] == "pass") return null;
-    // TODO(leafp) For now, we just use whatever the current expectation is,
-    // eventually we could do more automated reporting here.
-    return _parse(tokens[0]);
-  }
-
-  String toString() => '$level $typeName';
-}